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一看土壤颜色。肥田色深,瘦田色浅。 二看田土裂缝。肥田裂缝短而浅。细而多,晒田灌水后裂缝很快闭合;瘦田裂缝大而深,晒田灌水后闭合慢。 三看保水能力。肥田爽水,灌一次水能保持6～7天;瘦田渗水快,保水能力很差。
A look at soil color. Fat field color depth, thin field color shallow. Second, see the cracks in the soil. Feitian cracks short and shallow. Thin and more, Sha Tin field soon after the closure of irrigation cracks; thin field deep and deep cracks, Sha Tin closed slowly after irrigation. Third, look at water retention capacity. Feitian cool water, irrigation water can maintain 6 to 7 days; lean field seepage fast, poor water retention capacity.