The physical character of soil was also improved after covering straw. The soil bulk density was reduced. Fieldmoisture 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。
2
By the numerical simulation validation of moisture distribution and thermal field, it is indicated that the model in the thesis is feasible.
经过颗粒饲料的水分分布和温度场模拟验证结果表明，本文所建立的模型是可行的。
3
The HELP code was validated using data of field aerated moisture movement test by China Institute for RadiationProtection. The results show that simulation of HELP code is reasonable.