surface of soil

基本解释

The depositing surface of soil-retaining dams has certain vertical gradient, the tail exists obvious phenomenon of "raising tails".
淤地坝淤积面有一定的纵比降，尾部存在显著的“翘尾巴”现象。
After the replacement measure of the canal surface, the loss of stability of the shallow surface of soil body is mainly subject to the strength of th…
在进行渠坡表面置换措施后，土体浅层失稳主要受控于开挖过程中坡面胀缩影响带的强度。
According to the failure mode and shape of slip surface of soil slope and based on limit equilibrium theory, a new searching model was put forward to determine the critical slip surface of soil slope.
根据土质边坡的破坏模式及滑移面形状，由极限平衡理论，提出一种新的确定边坡最危险滑移面搜索模型，对土质边坡滑移面位置及安全系数空间分布进行分析与研究。

Because it doesn't stir up the soil, it lets the land keep its stored carbon and even adds some, because those corn stalks on the surface gradually become part of the soil.
NPR: Iowa Farmers Look to Trap Carbon in Soil
The water footprint includes both the water withdrawn from surface and groundwater and the use of soil water (in agricultural production).
UNESCO: Summary
In the vacuum, the sharp edges of the lunar soil cling together, leaving a smooth surface much as moist sand does on a beach.
MSN: No hoax: Moon landing stands as NASA's finest hour