Currently, Thai imports chemical fertilizer from abroad during the year 2546 (2003)-2543 (2000) 3.44 million tons at an average. Figure 20 a year value, 558.6 million (Department of agriculture, 2546 (2003)), which is the use of chemicals in large quantities, this is one reason that make agriculture of Thai are often experiencing losses, farmers have to bear the expense of chemicals in more investment, there is no end date due to lack of knowledge and understanding in the use of chemicals. How to use it appropriately. From time to time in order to use many types of chemicals used and repeated in much than necessary.
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