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土壤水分状况受其它土壤性质、根系活动和外部条件的制约;反过来,它又深刻地影响土壤性质和根系活动。从外部条件看,轮作制度就可以反映出水旱交替程度不同的土壤水分状况。从土壤本身看,土壤的透水性能,如爽水性(即具有适当的渗漏性)和滞水
Soil moisture status is governed by other soil properties, root activity and external conditions; in turn, it profoundly affects soil properties and root activity. From the external conditions, the rotation system can reflect the degree of alternation of water and soil conditions of soil moisture. From the soil itself, the water-permeable properties of the soil, such as cool water (ie, with proper leakage) and stagnant water