available soil water amount 土壤有效含水量
available soil water content 土壤有效水含量
Available soil water at planting 底墒
soil available water [土壤] 土壤有效水
saturation of soil available water 土壤有效水饱和度
soil available water-storage capacity 土壤有效水
available water content of soil 土壤有效贮水量
available water of forestry soil 林业土壤有效水分
The result showed that the available soil water quantity varied and was affected by precipitation apparently during a year.
结果表明，①土壤有效水量年内变化明显，受降水影响显著；
At last, a drought index model was developed by considering the water requirement of winter wheat and the available soil water content.
最后，根据冬小麦的需水规律和土壤有效水含量构造干旱指数模型。
Some areas, because of their soil texture, topographical position, or distance from rivers or groundwater, have virtually no water available to plants, whereas others do.
有些地区由于土质、地形位置或与河流或地下水的距离，几乎没有水分能提供给植物，而另一些地区则有。
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