Theory of "แกล้งดิน" due to the initiative.King's royal visit people in Narathiwat Province in 2002. 2524 ทรงพบ that after induction water from peat swamp areas to space and to alleviate flooding farming. Showed that the soil in the area is transformed into a swamp of acid sulfate soil, crop fails, because the soil sour. Because the soil is a waste organic matter or litter decay above, which contains sulfur compounds called compound pyrite. (pyrite: FeS2), Center for the study of political resulting from the Royal and the Royal แกล้งดิน meet project. "" By making the soil dry and wet times. To accelerate chemical reactions of the soil, which will go.Encourage of pyrite react with oxygen in the air, releasing the sulfuric acid, the acid soil till a step. "แกล้งดิน sour" until the point of extreme plants can not grow. Then find out how to improve soils to crops.
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