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Friday, June 30, 2023

Rehabilitation (penology)

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Rehabilitation_(penology)

Rehabilitation is the process of re-educating and preparing those who have committed a crime, to re-enter society.  The goal is to address all of the underlying root causes of crime in order to ensure inmates will be able to live a crime-free lifestyle once they are released from prison. It generally involves psychological approaches which target the cognitive distortions associated with specific kinds of crime committed by individual offenders, but it may also entail more general education like reading skills and career training. The goal is to re-integrate offenders back into society.

Methods

A successful rehabilitation of a prisoner is also helped if convicted persons:

  • are not placed in health-threateningly bad conditions, enjoy access to medical care and are protected from other forms of serious ill-treatment,
  • are able to maintain ties to the outside world,
  • learn new skills to assist them with working life on the outside,
  • enjoy clear and detailed statutory regulations clarifying the safeguards applicable and governing the use and disposal of any record of data relating to criminal matters.

See also prisoners' rights.

Applications

Norway

Norway's prison system is based on the principle of normalization and away from retribution to focus on rehabilitation. Inmates have access to amenities they would have outside of prison, such as an exclusive mini fridge, flat-screen TV, private bathroom, and access to outdoor environment. This, along with a shared kitchen and living area "to create a sense of family" among inmates and the absence of traditional prison uniforms contributes to Norway's rehabilitative normalcy system. The prison's structure is composed of Units A, B and C, with Unit A housing those in need of psychiatric or medical attention, thus being the most prohibitive of the three. Halden fengsel, referred to as the "world's most humane maximum-security prison", embodies the country's goal of reintegration by aiding inmates in sorting out housing and employment before leaving the prison. Rehabilitative measures involve education, job training, workshops to acquire a trade, and therapy along with the humane treatment they receive from personnel who have to complete three years of training to become prison guards.

The effectiveness of Norway's methods is evident as they hold the lowest recidivism rate worldwide at 20% as of December 2014. In comparison, in 2007, 14 prisons in England and Wales had reconviction rates of more than 70%, which cost an average of £40,000 a year for each prisoner. This has been accused of being "a huge investment in failure" and a "a total lack of consideration for potential future victims of released prisoners". "Better out than in" is Norway's Correctional Service unofficial motto that is in view with their rehabilitative system as a justice to society by integrating inmates as functioning members of society upon release.

Meditation

Vipassanā 10-day meditation courses were first taught in prisons in India in 1975. They have since been conducted in the US (1997–present), UK (1998), Spain (2003), Israel (2007) and Ireland (2015). Vipassana meditation aims to reduce negative mental states such as anger and aggression, and provide a path to inner peace.

Medical

Certain criminals can be treated chemically so that they do not become criminals again. 

Legislation

Europe

As established by the Council of Europe committee of ministers, "a crime policy aimed at crime prevention and the social reintegration of offenders should be pursued and developed".

"The European Court of Human Rights, also, has stated in various judgments that, while punishment remains one of the aims of imprisonment, the emphasis in European penal policy is now on the rehabilitative aim of imprisonment, particularly towards the end of a long prison sentence. ... A prospect of release is necessary, because human dignity requires that there must be a chance for a prisoner to atone for his offence and move towards rehabilitation. A review system is also needed because, over the course of a very long sentence, the balance between the grounds of detention (punishment, deterrence, public protection and rehabilitation) can shift to the point that detention can no longer be justified."

Germany

Per the German constitution, "Everyone has the right to life and to inviolability of his person. The freedom of the individual is inviolable. These rights may only be encroached upon pursuant to a law".

Italy

Per the Italian constitution, "Punishment cannot consist in treatment contrary to human dignity and must aim at rehabilitating the condemned".

United Kingdom

The Rehabilitation of Offenders Act 1974 of the UK Parliament enables some criminal convictions to be ignored after a rehabilitation period.

United States

The United States Code states that sentencing judges shall make imprisonment decisions "recognizing that imprisonment is not an appropriate means of promoting correction and rehabilitation".

In 2015 a number of reformers, including Koch family foundations, the ACLU, the Center for American Progress, Families Against Mandatory Minimums, the Coalition for Public Safety, and the MacArthur Foundation, announced a bipartisan resolution to reform the criminal justice system in the United States. Their efforts were lauded by President Obama who noted these reforms will improve rehabilitation and workforce opportunities for those who have served their sentences.

Over the last few decades, the United States prison population has increased significantly. While prisons are considered punishment, they also are intended to have the purpose of future crime prevention. A recent study found that of $74 billion total spent on incarceration among federal, state and local prisons, less than 1% of that was spent on prevention and treatment. Incarceration not only harms the individual as intended, but also has unintended negative effects on the inmate's family, community, and overall society. Inmate education has been shown to reduce recidivism. Evidence shows that inmates overwhelmingly take advantage of education programs if they are available to them and if they can afford them. A recent study showed the earning a GED while incarcerate reduced recidivism rates by 14% for those under 21, and 5% for those over 21. Substance abuse is also a major issue in the prison system. Between 1996 and 2006, despite a modest population increase of 12%, the number of incarcerated individuals rose by 33% and the number of substance-abusing individuals rose by 43%. Existing treatment programs have shown solid evidence that drug treatment programs, along with support after release, are effective at reducing recidivism. Emotional and mental health counseling is a core component of successful inmate rehabilitation. Without the proper innate motivation and desire from the inmate, attempts to educate or assist with substance abuse are less effective. A study revealed that more than half of those incarcerated had a mental health problem, defined as a recent history or symptoms of a mental health problem within the previous 12 months. California's juvenile justice system is based on rehabilitation instead of punishment.

Psychopathy and recidivism

Criminal recidivism is highly correlated with psychopathy. The psychopath is defined by an uninhibited gratification in criminal, sexual, or aggressive impulses and the inability to learn from past mistakes. Individuals with this disorder gain satisfaction through their antisocial behavior and lack remorse for their actions.

Findings indicate psychopathic prisoners have 2.5 times higher probability of being released from jail than undiagnosed ones, even though they are more likely to recidivate.

It has been shown that punishment and behavior modification techniques do not improve the behavior of a psychopath. Psychopathic individuals have been regularly observed to become more cunning and better able to hide their behaviour. It has been suggested that traditional therapeutic approaches actually make psychopaths if not worse, then far more adept at manipulating others and concealing their behavior. They are generally considered to be not only incurable but also untreatable.

Psychopaths also have a markedly distorted sense of the potential consequences of their actions, not only for others, but also for themselves. They do not, for example, deeply recognize the risk of being caught, disbelieved or injured as a result of their behaviour.

Criticism

Some criticisms of rehabilitative systems are that they can authorize lengthy restrictions of liberty (to allow time for diagnosis and treatment) and broad assumptions of governmental power over offenders' personalities. Moreover, due process concerns can be implicated by a lack of traditional safeguards of defendants' procedural rights in rehabilitative processes. Some rehabilitative programs, such as drug courts, have also been criticized for widening the net of penal control by sentencing more defendants to prison for violations of treatment regimes than would have gone to prison in the absence of those programs.

Land degradation

From Wikipedia, the free encyclopedia
 
Serious land degradation in Nauru after the depletion of the phosphate cover through mining

Land degradation is a process in which the value of the biophysical environment is affected by a combination of human-induced processes acting upon the land. It is viewed as any change or disturbance to the land perceived to be deleterious or undesirable. Natural hazards are excluded as a cause; however human activities can indirectly affect phenomena such as floods and bush fires.

Expert projections suggest that land degradation will be an important theme of the 21st century, impacting agricultural productivity, biodiversity loss, environmental change, and its effects on food security. It is estimated that up to 40% of the world's agricultural land is seriously degraded.

According to the Special Report on Climate Change and Land of the Intergovernmental Panel on Climate Change: "About a quarter of the Earth's ice-free land area is subject to human-induced degradation (medium confidence). Soil erosion from agricultural fields is estimated to be currently 11 to 20 times (no-tillage) to more than 100 times (conventional tillage) higher than the soil formation rate (medium confidence).".

The United Nations estimate that about 30% of land is degraded worldwide, and about 3.2 billion people reside in these degrading areas. About 12 million hectares of productive land – which roughly equals the size of Greece – is degraded every year. This happens because people exploit the land without protecting it. The United Nations Sustainable Development Goal 15 has a target to restore degraded land and soil and achieve a land degradation-neutral world by 2030.

Consequences

There are four main ways of looking at land degradation and its impact on the environment around it:

  1. A temporary or permanent decline in the productive capacity of the land. This can be seen through a loss of biomass, a loss of actual productivity or in potential productivity, or a loss or change in vegetative cover and soil nutrients.
  2. Action in the land's capacity to provide resources for human livelihoods. This can be measured from a base line of past land use.
  3. Loss of biodiversity: A loss of range of species or ecosystem complexity as a decline in the environmental quality.
  4. Shifting ecological risk: increased vulnerability of the environment or people to destruction or crisis. This is measured through a base line in the form of pre-existing risk of crisis or destruction.

A problem with defining land degradation is that what one group of people might view as degradation, others might view as a benefit or opportunity. For example, planting crops at a location with heavy rainfall and steep slopes would create scientific and environmental concern regarding the risk of soil erosion by water, yet farmers could view the location as a favourable one for high crop yields.

Different types

Potato field with soil erosion

In addition to the usual types of land degradation that have been known for centuries (water, wind and mechanical erosion, physical, chemical and biological degradation), four other types have emerged in the last 50 years:

Overall, more than 36 types of land degradation can be assessed. All are induced or aggravated by human activities, e.g. soil erosion, soil contamination, soil acidification, sheet erosion, silting, aridification, salinization, urbanization, etc.

Causes

The rate of global tree cover loss has approximately doubled since 2001, to an annual loss approaching an area the size of Italy.
 
Overgrazing by livestock can lead to land degradation

Land degradation is a global problem largely related to agricultural use, deforestation and climate change. Causes include:

Soil erosion in a wheat field near Pullman, US

Overcutting of vegetation occurs when people cut forests, woodlands and shrublands—to obtain timber, fuelwood and other products—at a pace exceeding the rate of natural regrowth. This is frequent in semi-arid environments, where fuelwood shortages are often severe.

Overgrazing is the grazing of natural pastures at stocking intensities above the livestock carrying capacity; the resulting decrease in the vegetation cover is a leading cause of wind and water erosion. It is a significant factor in Afghanistan. The growing population pressure, during 1980–1990, has led to decreases in the already small areas of agricultural land per person in six out of eight countries (14% for India and 21% for Pakistan).

Population pressure also operates through other mechanisms. Improper agricultural practices, for instance, occur only under constraints such as the saturation of good lands under population pressure which leads settlers to cultivate too shallow or too steep soils, plough fallow land before it has recovered its fertility, or attempt to obtain multiple crops by irrigating unsuitable soils.

High population density is not always related to land degradation. Rather, it is the practices of the human population that can cause a landscape to become degraded. Populations can be a benefit to the land and make it more productive than it is in its natural state. Land degradation is an important factor of internal displacement in many African and Asian countries.

Severe land degradation affects a significant portion of the Earth's arable lands, decreasing the wealth and economic development of nations. As the land resource base becomes less productive, food security is compromised and competition for dwindling resources increases, the seeds of famine and potential conflict are sown.

Climate change and land degradation

According to the Special Report on Climate Change and Land of the Intergovernmental Panel on Climate Change climate change is one of the causes of land degradation. The report state that: "Climate change exacerbates land degradation, particularly in lowlying coastal areas, river deltas, drylands and in permafrost areas (high confidence). Over the period 1961–2013, the annual area of drylands in drought has increased, on average by slightly more than 1% per year, with large inter-annual variability. In 2015, about 500 (380–620) million people lived within areas which experienced desertification between the year 1980s and 2000s. The highest numbers of people affected are in South and East Asia, the circum Sahara region including North Africa, and the Middle East including the Arabian Peninsula (low confidence). Other dryland regions have also experienced desertification. People living in already degraded or desertified areas are increasingly negatively affected by climate change (high confidence)." Additionally, it is claimed that 74% of the poor are directly affected by land degradation globally.

Significant land degradation from seawater inundation, particularly in river deltas and on low-lying islands, is a potential hazard that was identified in a 2007 IPCC report.

As a result of sea-level rise from climate change, salinity levels can reach levels where agriculture becomes impossible in very low-lying areas.

One way to consider climate change and land degradation is through the discipline of Land Change Science, which, among other things, tracks the long-term consequences of land degradation on the climate of a given area. By understanding the links between land degradation and climate change, scientists can better inform the creation of policies to reduce harm.

In 2009 the European Investment Bank agreed to invest up to $45 million in the Land Degradation Neutrality Fund (LDN Fund). Launched at UNCCD COP 13 in 2017, the LDN Fund invests in projects that generate environmental benefits, socio-economic benefits, and financial returns for investors. The Fund was initially capitalized at US$100 million and is expected to grow to US$300 million.

In the 2022 IPCC report, land degradation is responding more directly to climate change as all types of erosion and SOM declines (soil focus) are increasing. Other land degradation pressures are also being caused by human pressures like managed ecosystems. These systems include human run croplands and pastures.

Landslides also come into effect which is the cause of intensive events such as individual rain storms.

Sensitivity and resilience

Sensitivity and resilience are measures of the vulnerability of a landscape to degradation. These two factors combine to explain the degree of vulnerability. Sensitivity is the degree to which a land system undergoes change due to natural forces, human intervention or a combination of both. Resilience is the ability of a landscape to absorb change, without significantly altering the relationship between the relative importance and numbers of individuals and species that compose the community. It also refers to the ability of the region to return to its original state after being changed in some way. The resilience of a landscape can be increased or decreased through human interaction based upon different methods of land-use management. Land that is degraded becomes less resilient than undegraded land, which can lead to even further degradation through shocks to the landscape.

Military science

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Military_science

Military science is the study of military processes, institutions, and behavior, along with the study of warfare, and the theory and application of organized coercive force. It is mainly focused on theory, method, and practice of producing military capability in a manner consistent with national defense policy. Military science serves to identify the strategic, political, economic, psychological, social, operational, technological, and tactical elements necessary to sustain relative advantage of military force; and to increase the likelihood and favorable outcomes of victory in peace or during a war. Military scientists include theorists, researchers, experimental scientists, applied scientists, designers, engineers, test technicians, and other military personnel.

Military personnel obtain weapons, equipment, and training to achieve specific strategic goals. Military science is also used to establish enemy capability as part of technical intelligence.

In military history, military science had been used during the period of Industrial Revolution as a general term to refer to all matters of military theory and technology application as a single academic discipline, including that of the deployment and employment of troops in peacetime or in battle.

In military education, military science is often the name of the department in the education institution that administers officer candidate education. However, this education usually focuses on the officer leadership training and basic information about employment of military theories, concepts, methods and systems, and graduates are not military scientists on completion of studies, but rather junior military officers.

History

Class in telephony: enlisted men, U. S. Army. The telephone in modern warfare has robbed battle of much of its picturesqueness, romance, and glamor; as the dashing dispatch rider on his foam-flecked steed is antiquated. A message sent by telephone annihilates space and time, whereas the dispatch rider would, in most cases, be annihilated by shrapnel. Published 1917.

Even until the Second World War, military science was written in English starting with capital letters, and was thought of as an academic discipline alongside physics, philosophy and the medical sciences. In part this was due to the general mystique that accompanied education in a world where, as late as the 1880s, 75% of the European population was illiterate. The ability by the officers to make complex calculations required for the equally complex "evolutions" of the troop movements in linear warfare that increasingly dominated the Renaissance and later history, and the introduction of the gunpowder weapons into the equation of warfare only added to the veritable arcana of building fortifications as it seemed to the average individual.

Until the early 19th century, one observer, a British veteran of the Napoleonic Wars, Major John Mitchell, thought that it seemed nothing much had changed from the application of force on a battlefield since the days of the Greeks. He suggested that this was primarily so because as Clausewitz suggested, "unlike in any other science or art, in war the object reacts".

Until this time, and even after the Franco-Prussian War, military science continued to be divided between the formal thinking of officers brought up in the "shadow" of the Napoleonic Wars and younger officers like Ardant du Picq who tended to view fighting performance as rooted in the individual's and group psychology and suggested detailed analysis of this. This set in motion the eventual fascination of the military organisations with application of quantitative and qualitative research to their theories of combat; the attempt to translate military thinking as philosophic concepts into concrete methods of combat.

Military implements, the supply of an army, its organization, tactics, and discipline, have constituted the elements of military science in all ages; but improvement in weapons and accoutrements appears to lead and control all the rest.

The breakthrough of sorts made by Clausewitz in suggesting eight principles on which such methods can be based, in Europe, for the first time presented an opportunity to largely remove the element of chance and error from command decision making process. At this time emphasis was made on the topography (including trigonometry), military art (military science), military history, organisation of the army in the field, artillery and the science of projectiles, field fortifications and permanent fortifications, military legislation, military administration and manoeuvres.

The military science on which the model of German combat operations was built for the First World War remained largely unaltered from the Napoleonic model, but took into the consideration the vast improvements in the firepower and the ability to conduct "great battles of annihilation" through rapid concentration of force, strategic mobility, and the maintenance of the strategic offensive better known as the Cult of the offensive. The key to this, and other modes of thinking about war, remained analysis of military history and attempts to derive tangible lessons that could be replicated again with equal success on another battlefield as a sort of bloody laboratory of military science. Few were bloodier than the fields of the Western Front between 1914 and 1918. The person who probably understood Clausewitz better than most, Marshal Foch, initially participated in events that nearly destroyed the French Army.

It is not, however, true to say that military theorists and commanders were suffering from some collective case of stupidity. Their analysis of military history convinced them that decisive and aggressive strategic offensive was the only doctrine of victory, and feared that overemphasis of firepower, and the resultant dependence on entrenchment would make this all but impossible, and leading to the battlefield stagnant in advantages of the defensive position, destroying troop morale and willingness to fight. Because only the offensive could bring victory, lack of it, and not the firepower, was blamed for the defeat of the Imperial Russian Army in the Russo-Japanese War. Foch thought that "In strategy as well as in tactics one attacks".

In many ways military science was born as a result of the experiences of the Great War. "Military implements" had changed armies beyond recognition with cavalry to virtually disappear in the next 20 years. The "supply of an army" would become a science of logistics in the wake of massive armies, operations and troops that could fire ammunition faster than it could be produced, for the first time using vehicles that used the combustion engine, a watershed of change. Military "organisation" would no longer be that of the linear warfare, but assault teams, and battalions that were becoming multi-skilled with the introduction of machine guns and mortars and, for the first time, forcing military commanders to think not only in terms of rank and file, but force structure.

Tactics changed, too, with infantry for the first time segregated from the horse-mounted troops, and required to cooperate with tanks, aircraft and new artillery tactics. Perception of military discipline, too, had changed. Morale, despite strict disciplinarian attitudes, had cracked in all armies during the war, but the best-performing troops were found to be those where emphasis on discipline had been replaced with display of personal initiative and group cohesiveness such as that found in the Australian Corps during the Hundred Days Offensive. The military sciences' analysis of military history that had failed European commanders was about to give way to a new military science, less conspicuous in appearance, but more aligned to the processes of science of testing and experimentation, the scientific method, and forever "wed" to the idea of the superiority of technology on the battlefield.

Currently military science still means many things to different organisations. In the United Kingdom and much of the European Union the approach is to relate it closely to the civilian application and understanding. For example, in Belgium's Royal Military Academy, military science remains an academic discipline, and is studied alongside social sciences, including such subjects as humanitarian law. The United States Department of Defense defines military science in terms of specific systems and operational requirements, and include among other areas civil defense and force structure.

Employment of military skills

In the first instance military science is concerned with who will participate in military operations, and what sets of skills and knowledge they will require to do so effectively and somewhat ingeniously.

Military organization

Develops optimal methods for the administration and organization of military units, as well as the military as a whole. In addition, this area studies other associated aspects as mobilization/demobilization, and military government for areas recently conquered (or liberated) from enemy control.

Force structuring

Force structuring is the method by which personnel and the weapons and equipment they use are organized and trained for military operations, including combat. Development of force structure in any country is based on strategic, operational, and tactical needs of the national defense policy, the identified threats to the country, and the technological capabilities of the threats and the armed forces.

Force structure development is guided by doctrinal considerations of strategic, operational and tactical deployment and employment of formations and units to territories, areas and zones where they are expected to perform their missions and tasks. Force structuring applies to all Armed Services, but not to their supporting organisations such as those used for defense science research activities.

In the United States force structure is guided by the table of organization and equipment (TOE or TO&E). The TOE is a document published by the U.S. Department of Defense which prescribes the organization, manning, and equipage of units from divisional size and down, but also including the headquarters of Corps and Armies.

Force structuring also provides information on the mission and capabilities of specific units, as well as the unit's current status in terms of posture and readiness. A general TOE is applicable to a type of unit (for instance, infantry) rather than a specific unit (the 3rd Infantry Division). In this way, all units of the same branch (such as Infantry) follow the same structural guidelines which allows for more efficient financing, training, and employment of like units operationally.

Military education and training

Studies the methodology and practices involved in training soldiers, NCOs (non-commissioned officers, i.e. sergeants and corporals), and officers. It also extends this to training small and large units, both individually and in concert with one another for both the regular and reserve organizations. Military training, especially for officers, also concerns itself with general education and political indoctrination of the armed forces.

Military concepts and methods

Much of capability development depends on the concepts which guide use of the armed forces and their weapons and equipment, and the methods employed in any given theatre of war or combat environment.

Military history

Military activity has been a constant process over thousands of years, and the essential tactics, strategy, and goals of military operations have been unchanging throughout history. As an example, one notable maneuver is the double envelopment, considered to be the consummate military maneuver, notably executed by Hannibal at the Battle of Cannae in 216 BCE, and later by Khalid ibn al-Walid at the Battle of Walaja in 633 CE.

Via the study of history, the military seeks to avoid past mistakes, and improve upon its current performance by instilling an ability in commanders to perceive historical parallels during battle, so as to capitalize on the lessons learned. The main areas military history includes are the history of wars, battles, and combats, history of the military art, and history of each specific military service.

Military strategy and doctrines

Military strategy is in many ways the centerpiece of military science. It studies the specifics of planning for, and engaging in combat, and attempts to reduce the many factors to a set of principles that govern all interactions of the field of battle. In Europe these principles were first defined by Clausewitz in his Principles of War. As such, it directs the planning and execution of battles, operations, and wars as a whole. Two major systems prevail on the planet today. Broadly speaking, these may be described as the "Western" system, and the "Russian" system. Each system reflects and supports strengths and weakness in the underlying society.

Modern Western military art is composed primarily of an amalgam of French, German, British, and American systems. The Russian system borrows from these systems as well, either through study, or personal observation in the form of invasion (Napoleon's War of 1812, and The Great Patriotic War), and form a unique product suited for the conditions practitioners of this system will encounter. The system that is produced by the analysis provided by Military Art is known as doctrine.

Western military doctrine relies heavily on technology, the use of a well-trained and empowered NCO cadre, and superior information processing and dissemination to provide a level of battlefield awareness that opponents cannot match. Its advantages are extreme flexibility, extreme lethality, and a focus on removing an opponent's C3I (command, communications, control, and intelligence) to paralyze and incapacitate rather than destroying their combat power directly (hopefully saving lives in the process). Its drawbacks are high expense, a reliance on difficult-to-replace personnel, an enormous logistic train, and a difficulty in operating without high technology assets if depleted or destroyed.

Soviet military doctrine (and its descendants, in CIS countries) relies heavily on masses of machinery and troops, a highly educated (albeit very small) officer corps, and pre-planned missions. Its advantages are that it does not require well educated troops, does not require a large logistic train, is under tight central control, and does not rely on a sophisticated C3I system after the initiation of a course of action. Its disadvantages are inflexibility, a reliance on the shock effect of mass (with a resulting high cost in lives and material), and overall inability to exploit unexpected success or respond to unexpected loss.

Chinese military doctrine is currently in a state of flux as the People's Liberation Army is evaluating military trends of relevance to China. Chinese military doctrine is influenced by a number of sources including an indigenous classical military tradition characterized by strategists such as Sun Tzu, Western and Soviet influences, as well as indigenous modern strategists such as Mao Zedong. One distinctive characteristic of Chinese military science is that it places emphasis on the relationship between the military and society as well as viewing military force as merely one part of an overarching grand strategy.

Each system trains its officer corps in its philosophy regarding military art. The differences in content and emphasis are illustrative. The United States Army principles of war are defined in the U.S. Army Field Manual FM 100–5. The Canadian Forces principles of war/military science are defined by Land Forces Doctrine and Training System (LFDTS) to focus on principles of command, principles of war, operational art and campaign planning, and scientific principles.

Russian Federation armed forces derive their principles of war predominantly from those developed during the existence of the Soviet Union. These, although based significantly on the Second World War experience in conventional war fighting, have been substantially modified since the introduction of the nuclear arms into strategic considerations. The Soviet–Afghan War and the First and Second Chechen Wars further modified the principles that Soviet theorists had divided into the operational art and tactics. The very scientific approach to military science thinking in the Soviet union had been perceived as overly rigid at the tactical level, and had affected the training in the Russian Federation's much reduced forces to instil greater professionalism and initiative in the forces.

The military principles of war of the People's Liberation Army were loosely based on those of the Soviet Union until the 1980s when a significant shift begun to be seen in a more regionally-aware, and geographically-specific strategic, operational and tactical thinking in all services. The PLA is currently influenced by three doctrinal schools which both conflict and complement each other: the People's war, the Regional war, and the Revolution in military affairs that led to substantial increase in the defense spending and rate of technological modernisation of the forces.

The differences in the specifics of Military art notwithstanding, Military science strives to provide an integrated picture of the chaos of battle, and illuminate basic insights that apply to all combatants, not just those who agree with your formulation of the principles.

Military geography

Military geography encompasses much more than simple protestations to take the high ground. Military geography studies the obvious, the geography of theatres of war, but also the additional characteristics of politics, economics, and other natural features of locations of likely conflict (the political "landscape", for example). As an example, the Soviet–Afghan War was predicated on the ability of the Soviet Union to not only successfully invade Afghanistan, but also to militarily and politically flank the Islamic Republic of Iran simultaneously.

Military systems

How effectively and efficiently militaries accomplish their operations, missions and tasks is closely related not only to the methods they use, but the equipment and weapons they use.

Military intelligence

Military intelligence supports the combat commanders' decision making process by providing intelligence analysis of available data from a wide range of sources. To provide that informed analysis the commanders information requirements are identified and input to a process of gathering, analysis, protection, and dissemination of information about the operational environment, hostile, friendly and neutral forces and the civilian population in an area of combat operations, and broader area of interest. Intelligence activities are conducted at all levels from tactical to strategic, in peacetime, the period of transition to war, and during the war.

Most militaries maintain a military intelligence capability to provide analytical and information collection personnel in both specialist units and from other arms and services. Personnel selected for intelligence duties, whether specialist intelligence officers and enlisted soldiers or non-specialist assigned to intelligence may be selected for their analytical abilities and intelligence before receiving formal training.

Military intelligence serves to identify the threat, and provide information on understanding best methods and weapons to use in deterring or defeating it.

Military logistics

The art and science of planning and carrying out the movement and maintenance of military forces. In its most comprehensive sense, it is those aspects or military operations that deal with the design, development, acquisition, storage, distribution, maintenance, evacuation, and disposition of material; the movement, evacuation, and hospitalization of personnel; the acquisition or construction, maintenance, operation, and disposition of facilities; and the acquisition or furnishing of services.

Military technology and equipment

Military technology is not just the study of various technologies and applicable physical sciences used to increase military power. It may also extend to the study of production methods of military equipment, and ways to improve performance and reduce material and/or technological requirements for its production. An example is the effort expended by Nazi Germany to produce artificial rubbers and fuels to reduce or eliminate their dependence on imported POL (petroleum, oil, and lubricants) and rubber supplies.

Military technology is unique only in its application, not in its use of basic scientific and technological achievements. Because of the uniqueness of use, military technological studies strive to incorporate evolutionary, as well as the rare revolutionary technologies, into their proper place of military application.

Military and society

This speciality examines the ways that military and society interact and shape each other. The dynamic intersection where military and society meet is influenced by trends in society and the security environment. This field of study can be linked to works by Clausewitz ("War is the continuation of politics by other means") and Sun Tzu ("If not in the interest of the state, do not act"). The contemporary multi and interdisciplinary field traces its origin to World War II and works by sociologists and political scientists. This field of study includes "all aspects of relations between armed forces, as a political, social and economic institution, and the society, state or political ethnic movement of which they are a part". Topics often included within the purview of military and society include: veterans, women in the military, military families, enlistment and retention, reserve forces, military and religion, military privatization, Civil-military relations, civil-military cooperation, military and popular culture, military and the media, military and disaster assistance, military and the environment and the blurring of military and police functions.

Recruitment and retention

In an all volunteer military, the armed forces relies on market forces and careful recruiting to fill its ranks. It is thus, very important to understand factors that motivate enlistment and reenlistment. Service members must have the mental and physical ability to meet the challenges of military service and adapt to the military's values and culture. Studies show that enlistment motivation generally incorporates both self-interest (pay) and non-market values like adventure, patriotism, and comradeship.

Veterans

The study veterans or members of the military who leave and return to the society is one of the most important subfields of the military and society field of study. Veterans and their issues represent a microcosm of the field. Military recruits represent inputs that flow from the community into the armed forces, veterans are outputs that leave the military and reenter society changed by their time as soldiers, sailors, marines and airmen. Both society and veteran face multiple layers of adaptation and adjustment upon their reentry.

The definition of veteran is surprisingly fluid across countries. In the US veteran's status is established after a service member has completed a minimum period of service. Australia requires deployment to a combat zone. In the UK "Everyone who has performed military service for at least one day and drawn a day's pay is termed a veteran." The study of veterans focuses much attention on their, sometimes, uneasy transition back to civilian society. "Veterans must navigate a complex cultural transition when moving between environments," and they can expect positive and negative transition outcomes. Finding a good job and reestablishing a fulfilling family life is high on their resettlement agenda.

Military life is often violent and dangerous. The trauma of combat often results in post-traumatic stress disorder as well as painful physical health challenges which often lead to homelessness, suicide, substance, and excessive alcohol use, and family dysfunction. Society recognizes its responsibilities to veterans by offering programs and policies designed to redress these problems. Veterans also exert an influence on society often through the political process. For example, how do veterans vote and establish party affiliation? During the 2004 presidential election veterans were basically bipartisan. Veterans who fought in Croatia's war of independence voted for the nationalist parties in greater numbers.

Reserve forces

Reserve forces are service members who serve the armed forces on a part-time basis. These men and women constitute a "reserve" force that countries rely on for their defense, disaster support, and some day-to-day operations etc. In the United States an active reservist spends a weekend a month and two weeks a year in training. The size of a county's reserve force often depends on the type of recruitment method. Nations with a volunteer force tend to have a lower reserve percentage.

Recently the role of the reserves has changed. In many countries it [has] gone from a strategic force, largely static, to an operational force, largely dynamic. After WWII, relatively large standing forces took care of most operational needs. Reserves were held back strategically and deployed in times of emergency for example during the Cuban missile crisis. Subsequently, the strategic and budget situation changed and as a result the active duty military began to rely on reserve force, particularly for combat support and combat service support. Further large-scale military operation, routinely mobilize and deploy reservists 

Lomsky-Feder et al (2008p. 594) introduced the metaphor of reserve forces as Transmigrants who live "betwixt and between the civilian and military worlds". This metaphor captures "their structural duality" and suggests dynamic nature of reservist experience as they navigate commitments to their often conflicting civilian and military worlds. Given their greater likelihood of lengthy deployment, reservists face many of the same stresses as active duty but often with fewer support services.

University studies

Universities (or colleges) around the world also offer a degree(s) in military science:

International military sciences or studies associations

There are many international associations with the core purpose of bringing scholars in the field of Military Science together. Some are inter-disciplinary and have a broad scope, whilst others are confined and specialized focusing on more specific disciplines or subjects. Some are integrated in larger scientific communities like the International Sociological Association (ISA) and the American Psychological Association (APA) where others have grown out of military institutions or individuals who have had a particular interest in areas of military science and are military, defense or armed forces oriented. Some of these associations are:

Military studies journals

The following are notable journals in the field:

Compost

From Wikipedia, the free encyclopedia
Community-level composting in a rural area in Germany

Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical, and biological properties. It is commonly prepared by decomposing plant and food waste, recycling organic materials, and manure. The resulting mixture is rich in plant nutrients and beneficial organisms, such as bacteria, protozoa, nematodes, and fungi. Compost improves soil fertility in gardens, landscaping, horticulture, urban agriculture, and organic farming, reducing dependency on commercial chemical fertilizers. The benefits of compost include providing nutrients to crops as fertilizer, acting as a soil conditioner, increasing the humus or humic acid contents of the soil, and introducing beneficial microbes that help to suppress pathogens in the soil and reduce soil-borne diseases.

At the simplest level, composting requires gathering a mix of "greens" (green waste) and "browns" (brown waste). Greens are materials rich in nitrogen, such as leaves, grass, and food scraps. Browns are woody materials rich in carbon, such as stalks, paper, and wood chips. The materials break down into humus in a process taking months. Composting can be a multistep, closely monitored process with measured inputs of water, air, and carbon- and nitrogen-rich materials. The decomposition process is aided by shredding the plant matter, adding water, and ensuring proper aeration by regularly turning the mixture in a process using open piles or "windrows". Fungi, earthworms, and other detritivores further break up the organic material. Aerobic bacteria and fungi manage the chemical process by converting the inputs into heat, carbon dioxide, and ammonium ions.

Composter made from a hollow log

Composting is an important part of waste management, since food and other compostable materials make up about 20% of waste in landfills, and due to anaerobic conditions, these materials take longer to biodegrade in the landfill. Composting offers an environmentally superior alternative to using organic material for landfill because composting reduces methane emissions due to anaerobic conditions, and provides economic and environmental co-benefits. For example, compost can also be used for land and stream reclamation, wetland construction, and landfill cover.

Fundamentals

Home compost barrel
 
Compost bins at the Evergreen State College organic farm in Washington
 
Materials in a compost pile
 
Food scraps compost heap

Composting is an aerobic method of decomposing organic solid wastes, so can be used to recycle organic material. The process involves decomposing organic material into a humus-like material, known as compost, which is a good fertilizer for plants.

Composting organisms require four equally important ingredients to work effectively:

  • Carbon is needed for energy; the microbial oxidation of carbon produces the heat required for other parts of the composting process. High carbon materials tend to be brown and dry.
  • Nitrogen is needed to grow and reproduce more organisms to oxidize the carbon. High nitrogen materials tend to be green and wet. They can also include colourful fruits and vegetables.
  • Oxygen is required for oxidizing the carbon, the decomposition process. Aerobic bacteria need oxygen levels above 5% to perform the processes needed for composting.
  • Water is necessary in the right amounts to maintain activity without causing locally anaerobic conditions.

Certain ratios of these materials allow microorganisms to work at a rate that will heat up the compost pile. Active management of the pile (e.g., turning over the compost heap) is needed to maintain sufficient oxygen and the right moisture level. The air/water balance is critical to maintaining high temperatures 130–160 °F (54–71 °C) until the materials are broken down.

Composting is most efficient with a carbon-to-nitrogen ratio of about 25:1. Hot composting focuses on retaining heat to increase the decomposition rate, thus producing compost more quickly. Rapid composting is favored by having a carbon-to-nitrogen ratio of about 30 carbon units or less. Above 30, the substrate is nitrogen starved. Below 15, it is likely to outgas a portion of nitrogen as ammonia.

Nearly all dead plant and animal materials have both carbon and nitrogen in different amounts. Fresh grass clippings have an average ratio of about 15:1 and dry autumn leaves about 50:1 depending upon species. Composting is an ongoing and dynamic process; adding new sources of carbon and nitrogen consistently, as well as active management, is important.

Organisms

Organisms can break down organic matter in compost if provided with the correct mixture of water, oxygen, carbon, and nitrogen. They fall into two broad categories: chemical decomposers, which perform chemical processes on the organic waste, and physical decomposers, which process the waste into smaller pieces through methods such as grinding, tearing, chewing, and digesting.

Chemical decomposers

  • Bacteria are the most abundant and important of all the microorganisms found in compost. Bacteria process carbon and nitrogen and excrete plant-available nutrients such as nitrogen, phosphorus, and magnesium. Depending on the phase of composting, mesophilic or thermophilic bacteria may be the most prominent.
    • Mesophilic bacteria get compost to the thermophilic stage through oxidation of organic material. Afterwards, they cure it, which makes the fresh compost more bioavailable for plants.
    • Thermophilic bacteria do not reproduce and are not active between −5 and 25 °C (23 and 77 °F), yet are found throughout soil. They activate once the mesophilic bacteria have begun to breakdown organic matter and increase the temperature to their optimal range. They have been shown to enter soils via rainwater. They are present so broadly because of many factors, including their spores being resilient. Thermophilic bacteria thrive at higher temperatures, reaching 40–60 °C (104–140 °F) in typical mixes. Large-scale composting operations, such as windrow composting, may exceed this temperature, potentially killing beneficial soil microorganisms but also pasteurizing the waste.
    • Actinomycetota are needed to break down paper products such as newspaper, bark, etc., and other large molecules such as lignin and cellulose that are more difficult to decompose. The "pleasant, earthy smell of compost" is attributed to Actinomycetota. They make carbon, ammonia, and nitrogen nutrients available to plants.
  • Fungi such as molds and yeasts help break down materials that bacteria cannot, especially cellulose and lignin in woody material.
  • Protozoa contribute to biodegradation of organic matter and consume inactive bacteria, fungi, and micro-organic particulates.

Physical decomposers

  • Ants create nests, making the soil more porous and transporting nutrients to different areas of the compost.
  • Beetles as grubs feed on decaying vegetables.
  • Earthworms ingest partly composted material and excrete worm castings, making nitrogen, calcium, phosphorus, and magnesium available to plants. The tunnels they create as they move through the compost also increase aeration and drainage.
  • Flies feed on almost all organic material and put bacteria into the compost. Their population is kept in check by mites and the thermophilic temperatures that are unsuitable for fly larvae.
  • Millipedes break down plant material.
  • Rotifers feed on plant particles.
  • Snails and slugs feed on living or fresh plant material. They should be removed from compost before use, as they can damage plants and crops.
  • Sow bugs feed on rotting wood and decaying vegetation.
  • Springtails feed on fungi, molds, and decomposing plants.

Phases of composting

Three year old household compost

Under ideal conditions, composting proceeds through three major phases:

  1. Mesophilic phase: The initial, mesophilic phase is when the decomposition is carried out under moderate temperatures by mesophilic microorganisms.
  2. Thermophilic phase: As the temperature rises, a second, thermophilic phase starts, in which various thermophilic bacteria carry out the decomposition under higher temperatures (50 to 60 °C (122 to 140 °F).)
  3. Maturation phase: As the supply of high-energy compounds dwindles, the temperature starts to decrease, and the mesophilic bacteria once again predominate in the maturation phase.

Hot and cold composting – impact on timing

The time required to compost material relates to the volume of material, the particle size of the inputs (e.g. wood chips break down faster than branches), and the amount of mixing and aeration. Generally, larger piles reach higher temperatures and remain in a thermophilic stage for days or weeks. This is hot composting and is the usual method for large-scale municipal facilities and agricultural operations.

The Berkeley method produces finished compost in 18 days. It requires assembly of at least 1 cubic metre (35 cu ft) of material at the outset and needs turning every two days after an initial four-day phase. Such short processes involve some changes to traditional methods, including smaller, more homogenized particle sizes in the input materials, controlling carbon-to-nitrogen ratio (C:N) at 30:1 or less, and careful monitoring of the moisture level.

Cold composting is a slower process that can take up to a year to complete. It results from smaller piles, including many residential compost piles that receive small amounts of kitchen and garden waste over extended periods. Piles smaller than 1 cubic metre (35 cu ft) tend not to reach and maintain high temperatures. Turning is not necessary with cold composting, although a risk exists that parts of the pile may go anaerobic as it becomes compacted or waterlogged.

Pathogen removal

Composting can destroy some pathogens and seeds, by reaching temperatures above 50 °C (122 °F).[20] Dealing with stabilized compost – i.e. composted material in which microorganisms have finished digesting the organic matter and the temperature has reached between 50 and 70 °C (122 and 158 °F) – poses very little risk, as these temperatures kill pathogens and even make oocysts unviable. The temperature at which a pathogen dies depends on the pathogen, how long the temperature is maintained (seconds to weeks), and pH.

Compost products such as compost tea and compost extracts have been found to have an inhibitory effect on Fusarium oxysporum, Rhizoctonia species, and Pythium debaryanum, plant pathogens that can cause crop diseases. Aerated compost teas are more effective than compost extracts. The microbiota and enzymes present in compost extracts also have a suppressive effect on fungal plant pathogens. Compost is a good source of biocontrol agents like B. subtilis, B. licheniformis, and P. chrysogenum that fight plant pathogens. Sterilizing the compost, compost tea, or compost extracts reduces the effect of pathogen suppression.

Diseases that can be contracted from handling compost

When turning compost that has not gone through phases where temperatures above 50 °C (122 °F) are reached, a mouth mask and gloves must be worn to protect from diseases that can be contracted from handling compost, including:

Oocytes are rendered unviable by temperatures over 50 °C (122 °F).

Environmental benefits

Composting at home reduces the amount of green waste being hauled to dumps or composting facilities. The reduced volume of materials being picked up by trucks results in fewer trips, which in turn lowers the overall emissions from the waste-management fleet.

Materials that can be composted

Potential sources of compostable materials, or feedstocks, include residential, agricultural, and commercial waste streams. Residential food or yard waste can be composted at home, or collected for inclusion in a large-scale municipal composting facility. In some regions, it could also be included in a local or neighborhood composting project.

Organic solid waste

A large compost pile is steaming with the heat generated by thermophilic microorganisms.

The two broad categories of organic solid waste are green and brown. Green waste is generally considered a source of nitrogen and includes pre- and post-consumer food waste, grass clippings, garden trimmings, and fresh leaves. Animal carcasses, roadkill, and butcher residue can also be composted, and these are considered nitrogen sources.

Brown waste is a carbon source. Typical examples are dried vegetation and woody material such as fallen leaves, straw, woodchips, limbs, logs, pine needles, sawdust, and wood ash, but not charcoal ash. Products derived from wood such as paper and plain cardboard are also considered carbon sources.

Animal manure and bedding

On many farms, the basic composting ingredients are animal manure generated on the farm as a nitrogen source, and bedding as the carbon source. Straw and sawdust are common bedding materials. Nontraditional bedding materials are also used, including newspaper and chopped cardboard. The amount of manure composted on a livestock farm is often determined by cleaning schedules, land availability, and weather conditions. Each type of manure has its own physical, chemical, and biological characteristics. Cattle and horse manures, when mixed with bedding, possess good qualities for composting. Swine manure, which is very wet and usually not mixed with bedding material, must be mixed with straw or similar raw materials. Poultry manure must be blended with high-carbon, low-nitrogen materials.

Human excreta

Human excreta, sometimes called "humanure" in the composting context, can be added as an input to the composting process since it is a nutrient-rich organic material. Nitrogen, which serves as a building block for important plant amino acids, is found in solid human waste.  Phosphorus, which helps plants convert sunlight into energy in the form of ATP, can be found in liquid human waste.

Solid human waste can be collected directly in composting toilets, or indirectly in the form of sewage sludge after it has undergone treatment in a sewage treatment plant. Both processes require capable design, as potential health risks need to be managed. In the case of home composting, a wide range of microorganisms, including bacteria, viruses, and parasitic worms, can be present in feces, and improper processing can pose significant health risks. In the case of large sewage treatment facilities that collect wastewater from a range of residential, commercial and industrial sources, there are additional considerations. The composted sewage sludge, referred to as biosolids, can be contaminated with a variety of metals and pharmaceutical compounds. Insufficient processing of biosolids can also lead to problems when the material is applied to land.

Urine can be put on compost piles or directly used as fertilizer. Adding urine to compost can increase temperatures, so can increase its ability to destroy pathogens and unwanted seeds. Unlike feces, urine does not attract disease-spreading flies (such as houseflies or blowflies), and it does not contain the most hardy of pathogens, such as parasitic worm eggs.

Animal remains

Animal carcasses may be composted as a disposal option. Such material is rich in nitrogen.

Human bodies

  Jurisdictions in the United States that have legalized human composting

Human composting is a process for the final disposition of human remains in which microbes convert a deceased body into compost. It is also called natural organic reduction (NOR) or terramation.

Although the natural decomposition of human corpses into soil is a long-standing practice, a more rapid process that was developed in the early 21st century entails encasing human corpses in wood chips, straw, and alfafa until thermophile microbes decompose the body. In this manner, the transformation can be sped up to as little as 1–2 months. The accelerated process is based in part on techniques developed for the composting of livestock.

Though human composting was common before modern burial practices and in some religious traditions, contemporary society has tended to favor other disposition methods. However, cultural attention to concerns like sustainability and environmentally friendly burial has led to a resurgence in interest in direct composting of human bodies. Some religious and cultural communities have been critical of this modern composting practice, even though it is in many ways a return to more traditional practices. Human composting is legal in Sweden and in multiple US states, and natural burials without a casket or with a biodegradable container are common practice in Muslim and Jewish traditions and are allowed in the UK, the US, and many other locations throughout the world.

Composting technologies

Backyard composter

Industrial-scale composting

In-vessel composting

In-vessel composting generally describes a group of methods that confine the composting materials within a building, container, or vessel. In-vessel composting systems can consist of metal or plastic tanks or concrete bunkers in which air flow and temperature can be controlled, using the principles of a "bioreactor". Generally the air circulation is metered in via buried tubes that allow fresh air to be injected under pressure, with the exhaust being extracted through a biofilter, with temperature and moisture conditions monitored using probes in the mass to allow maintenance of optimum aerobic decomposition conditions.

This technique is generally used for municipal scale organic waste processing, including final treatment of sewage biosolids, to a stable state with safe pathogen levels, for reclamation as a soil amendment. In-vessel composting can also refer to aerated static pile composting with the addition of removable covers that enclose the piles, as with the system in extensive use by farmer groups in Thailand, supported by the National Science and Technology Development Agency there. In recent years, smaller scale in-vessel composting has been advanced. These can even use common roll-off waste dumpsters as the vessel. The advantage of using roll-off waste dumpsters is their relatively low cost, wide availability, they are highly mobile, often do not need building permits and can be obtained by renting or buying.

Aerated static-pile composting

Channeled concrete floor of a composting pad for perforated piping that delivers oxygen to the composting mass

Aerated static pile (ASP) composting refers to any of a number of systems used to biodegrade organic material without physical manipulation during primary composting. The blended admixture is usually placed on perforated piping, providing air circulation for controlled aeration. It may be in windrows, open or covered, or in closed containers. With regard to complexity and cost, aerated systems are most commonly used by larger, professionally managed composting facilities, although the technique may range from very small, simple systems to very large, capital intensive, industrial installations.

Aerated static piles offer process control for rapid biodegradation, and work well for facilities processing wet materials and large volumes of feedstocks. ASP facilities can be under roof or outdoor windrow composting operations, or totally enclosed in-vessel composting, sometimes referred to tunnel composting.

Windrow composting

Windrow turner used on maturing piles at a biosolids composting facility in Canada.
 
Maturing windrows at an in-vessel composting facility.

In agriculture, windrow composting is the production of compost by piling organic matter or biodegradable waste, such as animal manure and crop residues, in long rows – windrow.

As the process is aerobic, it is also known as Open Windrow Composting (OWC) or Open Air Windrow Composting (OAWC).

Other systems at household level

Hügelkultur (raised garden beds or mounds)

An almost completed hügelkultur bed; the bed does not have soil on it yet.
 

The practice of making raised garden beds or mounds filled with rotting wood is also called Hügelkultur in German. It is in effect creating a nurse log that is covered with soil.

Benefits of Hügelkultur garden beds include water retention and warming of soil. Buried wood acts like a sponge as it decomposes, able to capture water and store it for later use by crops planted on top of the bed.

Composting toilets

Composting toilet at Activism Festival 2010 in the mountains outside Jerusalem

A composting toilet is a type of dry toilet that treats human waste by a biological process called composting. This process leads to the decomposition of organic matter and turns human waste into compost-like material. Composting is carried out by microorganisms (mainly bacteria and fungi) under controlled aerobic conditions. Most composting toilets use no water for flushing and are therefore called "dry toilets".

In many composting toilet designs, a carbon additive such as sawdust, coconut coir, or peat moss is added after each use. This practice creates air pockets in the human waste to promote aerobic decomposition. This also improves the carbon-to-nitrogen ratio and reduces potential odor. Most composting toilet systems rely on mesophilic composting. Longer retention time in the composting chamber also facilitates pathogen die-off. The end product can also be moved to a secondary system – usually another composting step – to allow more time for mesophilic composting to further reduce pathogens.

Composting toilets, together with the secondary composting step, produce a humus-like end product that can be used to enrich soil if local regulations allow this. Some composting toilets have urine diversion systems in the toilet bowl to collect the urine separately and control excess moisture. A vermifilter toilet is a composting toilet with flushing water where earthworms are used to promote decomposition to compost.

Related technologies

  • Vermicompost (also called worm castings, worm humus, worm manure, or worm faeces) is the end product of the breakdown of organic matter by earthworms. These castings have been shown to contain reduced levels of contaminants and a higher saturation of nutrients than the organic materials before vermicomposting.
  • Black soldier fly (Hermetia illucens) larvae are able to rapidly consume large amounts of organic material and can be used to treat human waste. The resulting compost still contains nutrients and can be used for biogas production, or further traditional composting or vermicomposting.
  • Bokashi is a fermentation process rather than a decomposition process, and so retains the feedstock's energy, nutrient and carbon contents. There must be sufficient carbohydrate for fermentation to complete and therefore the process is typically applied to food waste, including noncompostable items. Carbohydrate is transformed into lactic acid, which dissociates naturally to form lactate, a biological energy carrier. The preserved result is therefore readily consumed by soil microbes and from there by the entire soil food web, leading to a significant increase in soil organic carbon and turbation. The process completes in weeks and returns soil acidity to normal.
  • Co-composting is a technique that processes organic solid waste together with other input materials such as dewatered fecal sludge or sewage sludge.
  • Anaerobic digestion combined with mechanical sorting of mixed waste streams is increasingly being used in developed countries due to regulations controlling the amount of organic matter allowed in landfills. Treating biodegradable waste before it enters a landfill reduces global warming from fugitive methane; untreated waste breaks down anaerobically in a landfill, producing landfill gas that contains methane, a potent greenhouse gas. The methane produced in an anaerobic digester can be converted to biogas.

Uses

Agriculture and gardening

Compost - detail
Compost used as fertilizer

On open ground for growing wheat, corn, soybeans, and similar crops, compost can be broadcast across the top of the soil using spreader trucks or spreaders pulled behind a tractor. It is expected that the spread layer is very thin (approximately 6 mm (0.24 in)) and worked into the soil prior to planting. Application rates of 25 mm (0.98 in) or more are not unusual when trying to rebuild poor soils or control erosion. Due to the extremely high cost of compost per unit of nutrients in the United States, on-farm use is relatively rare since rates over 4 tons/acre may not be affordable. This results from an over-emphasis on "recycling organic matter" than on "sustainable nutrients." In countries such as Germany, where compost distribution and spreading are partially subsidized in the original waste fees, compost is used more frequently on open ground on the premise of nutrient "sustainability".

In plasticulture, strawberries, tomatoes, peppers, melons, and other fruits and vegetables are grown under plastic to control temperature, retain moisture and control weeds. Compost may be banded (applied in strips along rows) and worked into the soil prior to bedding and planting, be applied at the same time the beds are constructed and plastic laid down, or used as a top dressing.

Many crops are not seeded directly in the field but are started in seed trays in a greenhouse. When the seedlings reach a certain stage of growth, they are transplanted in the field. Compost may be part of the mix used to grow the seedlings, but is not normally used as the only planting substrate. The particular crop and the seeds' sensitivity to nutrients, salts, etc. dictates the ratio of the blend, and maturity is important to insure that oxygen deprivation will not occur or that no lingering phyto-toxins remain.

Compost can be added to soil, coir, or peat, as a tilth improver, supplying humus and nutrients. It provides a rich growing medium as absorbent material. This material contains moisture and soluble minerals, which provide support and nutrients. Although it is rarely used alone, plants can flourish from mixed soil, sand, grit, bark chips, vermiculite, perlite, or clay granules to produce loam. Compost can be tilled directly into the soil or growing medium to boost the level of organic matter and the overall fertility of the soil. Compost that is ready to be used as an additive is dark brown or even black with an earthy smell.

Generally, direct seeding into a compost is not recommended due to the speed with which it may dry, the possible presence of phytotoxins in immature compost that may inhibit germination, and the possible tie up of nitrogen by incompletely decomposed lignin. It is very common to see blends of 20–30% compost used for transplanting seedlings.

Compost can be used to increase plant immunity to diseases and pests.

Compost tea

Compost tea is made up of extracts of fermented water leached from composted materials.Composts can be either aerated or non-aerated depending on its fermentation process. Compost teas are generally produced from adding compost to water in a ratio of 1:4–1:10, occasionally stirring to release microbes.

There is debate about the benefits of aerating the mixture. Non-aerated compost tea is cheaper and less labor intensive, but there are conflicting studies regarding the risks of phytotoxicity and human pathogen regrowth. Aerated compost tea brews faster and generates more microbes, but has potential for human pathogen regrowth.

Field studies have shown the benefits of adding compost teas to crops due to organic matter input, increased nutrient availability, and increased microbial activity. They have also been shown to have a suppressive effect on plant pathogens and soil-borne diseases. The efficacy is influenced by a number of factors, such as the preparation process, the type of source the conditions of the brewing process, and the environment of the crops. Adding nutrients to compost tea can be beneficial for disease suppression, although it can trigger the regrowth of human pathogens like E. coli and Salmonella.

Compost extract

Compost extracts are unfermented or non-brewed extracts of leached compost contents dissolved in any solvent.

Commercial sale

Compost is sold as bagged potting mixes in garden centers and other outlets. This may include composted materials such as manure and peat but is also likely to contain loam, fertilizers, sand, grit, etc. Varieties include multi-purpose composts designed for most aspects of planting, John Innes formulations, grow bags, designed to have crops such as tomatoes directly planted into them. There are also a range of specialist composts available, e.g. for vegetables, orchids, houseplants, hanging baskets, roses, ericaceous plants, seedlings, potting on, etc.

Other

Compost can also be used for land and stream reclamation, wetland construction, and landfill cover.

The temperatures generated by compost can be used to heat greenhouses, such as by being placed around the outside edges.

Regulations

A kitchen compost bin is used to transport compostable items to an outdoor compost bin.

There are process and product guidelines in Europe that date to the early 1980s (Germany, the Netherlands, Switzerland) and only more recently in the UK and the US. In both these countries, private trade associations within the industry have established loose standards, some say as a stop-gap measure to discourage independent government agencies from establishing tougher consumer-friendly standards. Compost is regulated in Canada and Australia as well.

EPA Class A and B guidelines in the United States were developed solely to manage the processing and beneficial reuse of sludge, also now called biosolids, following the US EPA ban of ocean dumping. About 26 American states now require composts to be processed according to these federal protocols for pathogen and vector control, even though the application to non-sludge materials has not been scientifically tested. An example is that green waste composts are used at much higher rates than sludge composts were ever anticipated to be applied at. U.K guidelines also exist regarding compost quality, as well as Canadian, Australian, and the various European states.

In the United States, some compost manufacturers participate in a testing program offered by a private lobbying organization called the U.S. Composting Council. The USCC was originally established in 1991 by Procter & Gamble to promote composting of disposable diapers, following state mandates to ban diapers in landfills, which caused a national uproar. Ultimately the idea of composting diapers was abandoned, partly since it was not proven scientifically to be possible, and mostly because the concept was a marketing stunt in the first place. After this, composting emphasis shifted back to recycling organic wastes previously destined for landfills. There are no bonafide quality standards in America, but the USCC sells a seal called "Seal of Testing Assurance" (also called "STA"). For a considerable fee, the applicant may display the USCC logo on products, agreeing to volunteer to customers a current laboratory analysis that includes parameters such as nutrients, respiration rate, salt content, pH, and limited other indicators.

Many countries such as Wales and some individual cities such as Seattle and San Francisco require food and yard waste to be sorted for composting (San Francisco Mandatory Recycling and Composting Ordinance).

The USA is the only Western country that does not distinguish sludge-source compost from green-composts, and by default 50% of US states expect composts to comply in some manner with the federal EPA 503 rule promulgated in 1984 for sludge products.

There are health risk concerns about PFASs ("forever chemicals") levels in compost derived from sewage sledge sourced biosolids, and EPA has not set health risk standards for this. The Sierra Club recommends that home gardeners avoid the use of sewage sludge-base fertilizer and compost, in part due to potentially high levels of PFASs. The EPA PFAS Strategic Roadmap initiative, running from 2021 to 2024, will consider the full lifecycle of PFAS including health risks of PFAS in wastewater sludge.

History

Compost basket

Composting dates back to at least the early Roman Empire, and was mentioned as early as Cato the Elder's 160 BCE piece De Agri Cultura. Traditionally, composting involved piling organic materials until the next planting season, at which time the materials would have decayed enough to be ready for use in the soil. The advantage of this method is that little working time or effort is required from the composter and it fits in naturally with agricultural practices in temperate climates. Disadvantages (from the modern perspective) are that space is used for a whole year, some nutrients might be leached due to exposure to rainfall, and disease-producing organisms and insects may not be adequately controlled.

Composting began to modernize somewhat from the 1920s in Europe as a tool for organic farming. The first industrial station for the transformation of urban organic materials into compost was set up in Wels, Austria in the year 1921. Early proponents of composting within farming include Rudolf Steiner, founder of a farming method called biodynamics, and Annie Francé-Harrar, who was appointed on behalf of the government in Mexico and supported the country in 1950–1958 to set up a large humus organization in the fight against erosion and soil degradation. Sir Albert Howard, who worked extensively in India on sustainable practices, and Lady Eve Balfour were also major proponents of composting. Composting was imported to America by the likes of:

Cell potency

From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Cel...