Топырақты сақтау және жаңартуға бағытталған егіс жүйесі

Farming system to preserve and regenerate land capacity

Conservation agriculture (CA) can be defined by a statement given by the Food and Agriculture Organization of the United Nations as "Conservation Agriculture (CA) is a farming system that can prevent losses of arable land while regenerating degraded lands. It promotes minimum soil disturbance (i. e. no till farming), maintenance of a permanent soil cover, and diversification of plant species. It enhances biodiversity and natural biological processes above and below the ground surface, which contribute to increased water and nutrient use efficiency and to improved and sustained crop production." Agriculture according to the New Standard Encyclopedia is "one of the most important sectors in the economies of most nations" (New Standard 1992). At the same time conservation is the use of resources in a manner that safely maintains a resource that can be used by humans. Conservation has become critical because the global population has increased over the years and more food needs to be produced every year (New Standard 1992). Sometimes referred to as "agricultural environmental management", conservation agriculture may be sanctioned and funded through conservation programs promulgated through agricultural legislation, such as the U. S. Farm Bill.

The Food and Agriculture Organization of the United Nations (FAO) has determined that conservation agriculture (CA) has three key principles that producers (farmers) can proceed through in the process of CA. These three principles outline what conservationists and producers believe can be done to conserve what we use for a longer period of time. The first key principle in CA is practicing minimum soil disturbance which is essential to maintaining minerals within the soil, stopping erosion, and preventing water loss from occurring within the soil. In the past agriculture has looked at soil tillage as a main process in the introduction of new crops to an area. It was believed that tilling the soil would increase fertility within the soil through mineralization that takes place in the soil. Also tilling of soil can cause severe erosion and crusting which leads to a decrease in soil fertility. Today tillage is seen as destroying organic matter that can be found within the soil cover. No till farming has caught on as a process that can save soil organic levels for a longer period and still allow the soil to be productive for longer periods (FAO 2007). Additionally, the process of tilling can increase time and labor for producing that crop. Minimum soil disturbance also reduce destruction of soil micro and macro organism habitats that is common in conventional ploughing practices. In this approach, land is set aside to preserve the wildlife while the rest is used to fulfill the farmers need of agricultural commodities. Farmers take this approach by leaving some aspects of the land the same (i. e., scattered trees and patches of initial vegetation) while harvesting a diverse grouping of crops around it. This, in turn, allows for animals such as bees to pollinate, and the natural predation of unwanted pests. By practicing such method the harvester can expect to see much lower yields, but also an increase in biodiversity given time. This decrease of yield then gives rise to the idea of land sparing, the maximization of yield in a homogenous landscape.

As much as conservation agriculture can benefit the world, there are some problems that come with it. There are many reasons why conservation agriculture cannot always be a win win situation. Examples of these disadvantages include high initial costs of specialized planting equipment, and a new dynamic farming system that requires new management skills and a learning process by the farmer. Long term experience with conservation farming all over the world has shown that this system does not present more or less but different problems to a farmer, all of them possible to resolve. There are not enough people who can financially turn from conventional farming to conservation. The process of CA takes time; when a producer first becomes a conservationist, the results can be a financial loss to them (in most cases, the investment and policy generally exist). CA is based upon establishing an organic layer and producing its own fertilizer and this may take time. It can be many years before a producer will start to see better yields than he/she has had previously. Another financial undertaking is purchasing of new equipment. When starting to use CA, a producer may have to buy new planters or drills in order to produce effectively. These financial tasks are ones that may impact whether or not a producer decides to switch to CA or not. Interactions with livestock and competition for crop residues In developing countries, livestock is often an integral part of the farming system, so it needs to be considered when introducing CA. The application of CA requires a critical level of crop residues remaining on the surface, while traditionally most of these residues are used for feeding livestock. It is a common practice to allow livestock to graze in the harvested crop fields or to slash the crop residue and store it for fodder. With the struggle to adapt comes the struggle to make CA grow across the globe. CA has not spread as quickly as most conservationists would like. The reason for this is because there is not enough pressure for producers in places such as North America to change their way of living to a more conservationist outlook. But in the tropics there is more pressure to change to conservation areas because of the limited resources that are available. Places like Europe have also started to catch onto the ideas and principles of CA, but still nothing much is being done to change due to there being a minimal amount of pressure for people to change their ways of living (FAO 2006). With CA comes the idea of producing enough food. With cutting back in fertilizer, not tilling the ground, and other processes comes the responsibility to feed the world. According to the Population Reference Bureau, there were around 6.08 billion people on Earth in the year 2000. By 2050 there will be an estimated 9.1 billion people. With this increase comes the responsibility for producers to increase food supply using the same or less land than we use today. Problems arise in the fact that if CA farms do not produce as much as conventional farms, this leaves the world with less food for more people.