Agriculture plans to focus on increasing agricultural productivity through the use of chemical fertilizers are numerous and widely consecutive periods of time can cause deterioration of the soil structure and soil fertility. Due to the use of chemical fertilizers is not the soil. But the compression of nutrients to the plants. Without addition of organic matter added to the soil. And the use of chemical fertilizers to accelerate the decomposition of organic matter in the soil. Deterioration in soil structure Soil compaction is a harsh way. Does not absorb water in the dry season, the use of chemical pesticides. Causing toxins in the environment. This is because the use of chemical pesticides each time to take advantage of only 25%, the remaining 75% is distributed in soil, water and air in the environment. The key is the Chemical pesticides not only destroy the pests. But also destroying insects and beneficial microorganisms in nature. Which destroy the ecological balance in nature. And the result is The outbreak of diseases and pests, the more force, for example, an outbreak of BPH that destroys productivity in Thailand in 2533-2534, which has an area of 3.5 million hectares of prevalent farming new plan. leads to monoculture. And the expansion of agricultural areas Cause a natural forest encroachment. Cause the loss of forests as a key resource in the world and with major watersheds.
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