Simulating experiments were conducted to study the effects of sand and gravel mulches with different sizes on moisture evaporationfromsoilsurface.
为研究不同粒径砂石覆盖对土壤蒸发过程的影响，进行模拟试验。
2
The directions for agricultural water saving were pointed out that were to reduce evaporationfromsoilsurface and make the wasted precipitation efficacy.
提出了减少地面蒸发损失和使降水有效利用是未来农业节水的主攻方向。
3
They have also learned how to better preserved the precious surface water by using the thin film to cover the soil so that the evaporation of the moisture from the ground can be minimized.