These issues cause soil degradation Affect the cultivation and the environment in the vicinity, and also makes the microorganisms in the soil decreased. Soil fertility and yield of crops grown reduced Farmers need more chemical fertilizer Production costs, and thus rise accordingly. In addition, the use of chemicals in excess quantity assigned to make farmers suffer from environmental problems and also affect the quality and safety standards of the agricultural output of consumer goods in the country, and export goods. If there is an accumulation of these substances in the agricultural output increased the occurrence of diseases will be more clearly. Items will not be accepted by the world market. Jeopardize the export of Thai agricultural goods.
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