from the Study on soil acidity in the field in the community, Wang thong Thani province. The purpose is to know the condition of 1. Soil fertility in farming, much 2.Study of the relationship between the pH of soil and nutrients in soil samples used in the field is the soil in the community, Wang thong Thani province. The instrument was 1. 2 beaker. Distilled water 3. Litmus 4.A glass rod and method is the soil in the applied to check the pH, it is found that the area has been the acid in the medium. The pH value of soil, plants can grow well in rice cultivation in the 5.0 - 6.5 experiment divided area is 4 the 1. Corner on the right side of the paddy field 2. Angle on the left bank of the paddy field 3. The bottom corner above the right side of the paddy field 4. The bottom corner above the left bank of the paddy fields. The average: 1.The corner on the right side of the paddy fields were at 6 is a weak acid, the soil will not harm the พืชมี suitability on solubility nutrient is beneficial to the plant 2.The bottom corner above the right bank of the paddy fields were at 6 acid is soft, harmless to plants appropriate to solubility nutrient is beneficial to plants can absorb the minerals in soils 3.The bottom corner above the right bank of the paddy fields were at 5 is moderately acid, harmless to plants absorb the minerals in the soil 4 quite well.Bottom up on the left side of the paddy fields were at 5 acid is moderate.Rice will grow as well be nutrients. In the soil, it will change to suitable for the rice and farmers need to adjust soil because of the quantity of nitrogen, phosphorus,
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