soil coarse grained
... soil colloids 胶质土 soil coarse grained 粗粒土壤 soil classification system 土壤分类系统 ...
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实验结果表明，细粒土壤下垫有粗粒土壤时，上部细粒土壤的持水能力有明显的提高，可以超过最小持水量而得到若干补充水量。
Experimental results show that fine texture soil layer overlying coarse texture soil layer can markedly increase water-holding capacity and get some supplement of water after reaching field capacity.
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