Posted by: Mahdi Ebrahimi | October 15, 2007

blog action day: benefit of organic agriculture for Environment

Organic farming is a form of agriculture which avoids or largely excludes the use of synthetic fertilizers and pesticides, plant growth regulators, and livestock feed additives. As far as possible, organic farmers rely on crop rotation, crop residues, animal manures and mechanical cultivation to maintain soil productivity and tilts to supply plant nutrients, and to control weeds, insects and other pests.
According to the international organic farming organization IFOAM : “The role of organic agriculture, whether in farming, processing, distribution, or consumption, is to sustain and enhance the health of ecosystems and organisms from the smallest in the soil to human beings and environment.
A 22-year farm trial study by Cornell University published in 2005 concluded that organic farming produces the same corn and soybean yields as conventional methods, but consumed less energy and contained no pesticide residues. On the other hand, a prominent 21-year Swiss study found an average of 20% lower organic yields over conventional, along with 50% lower expenditure on fertilizer and energy, and 97% less pesticides.
Recently study shows that organic farming reduce the global warming by carbon sequestration and decrease the energy consumption for production.
Pesticide and chemical fertilizer Runoff is one of the main problem for environment
Pesticide and chemical fertilizer runoff is one of the most significant effects of pesticide and chemical fertilizer use. The USDA Natural Resources Conservation Service tracks the environmental risk posed by pesticide and chemical fertilizer water contamination from farms. In organic farming the farmer never use chemical pesticide and fertilizer.
Genetically modified organisms the main problem of environmental biodiversity in the world
A key characteristic of organic farming is rejection of genetically engineered products, including plants and animals.
Soil conservation and organic farming
The practice of ploughing to prepare soil for planting is claimed to increase soil damage compared to using herbicides, like glyphosates. In fact, this argument applies primarily to large-scale, chemical-based agriculture, where huge areas are repeatedly tilled and planted with the same crops. By using artificial fertilizer rather than replacing organic material, the soil structure is progressively destroyed, and becomes increasingly susceptible to wind and water erosion. In organic practice the amount of tillage is less than conventional and the soil erosion is so too less.
Nitrate Pollution
Harmful nitrates which leach into lakes, rivers, and groundwater can cause algae blooms, eutrophication, and subsequent dead zones. The main contributor to nitrate pollution is nitrogen-based fertilizers whose use is expected to “double or almost triple by 2050”. Researchers at the National Academy of Sciences found that that organically fertilizing fields “significantly reduce harmful nitrate leaching” over conventionally fertilized fields: “annual nitrate leaching was 4.4-5.6 times higher in conventional plots than organic plots”.
Increased consumer awareness of food safety issues and environmental concerns has contributed to the growth in organic farming over the last few years.
At least organic agriculture practice respect to the environment more than industrial agriculture practice. I think one way to resolve the problems of environmental disaster is increase the culture of organic food consumption and increase awareness of chemical material hazardous.
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Responses

  1. emm.. very nice


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