The physical character of soil was also improved after covering straw. The soil bulk density was reduced. Field moisture capacity and porosity percentage were increased.
覆草后土壤的物理性状也得到改善，土壤容重降低、田间持水量和孔隙度提高。
Field studies also showed that proper concentration of polymers could effectively improve water supply and moisture holding capacity, so as to improve the survival rate of seedlings.
野外应用表明，适当浓度的保水剂可以有效提高土壤保水能力和供水能力，提高苗木根冠比和成活率。
The effects of wilting point, field capacity and initial amount of available soil moisture in root zone on soil moisture were positive.
凋萎湿度、田间持水量、整个根区初始土壤有效含水量对土壤水分影响为正效应；
This indicates that photosynthetic rate has the threshold response to soil moisture and the threshold value is about 65% of field capacity.
说明光合作用对土壤水分存在一个“阈值”反应，此值为土壤田间持水量的6 5%左右。
To a sample dryland soil in Chaoyang county, Liaoning province, computational result of critical soil moisture content for maize sowing is about 17.34% (gravity content), or 58.1% of field capacity.
针对于朝阳县试验土壤，计算结果显示，播种玉米时土壤临界含水率为17.34 %，为田间持水率的5 8.1%。
To a sample dryland soil in Chaoyang county, Liaoning province, computational result of critical soil moisture content for maize sowing is about 17.34% (gravity content), or 58.1% of field capacity.
针对于朝阳县试验土壤，计算结果显示，播种玉米时土壤临界含水率为17.34 %，为田间持水率的5 8.1%。
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