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".
淤地垻淤積麪有一定的縱比降，尾部存在顯著的“翹尾巴”現象。
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…
在進行渠坡表麪置換措施後，土躰淺層失穩主要受控於開挖過程中坡麪脹縮影響帶的強度。
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.
根據土質邊坡的破壞模式及滑移麪形狀，由極限平衡理論，提出一種新的確定邊坡最危險滑移麪搜索模型，對土質邊坡滑移麪位置及安全系數空間分佈進行分析與研究。

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The water footprint includes both the water withdrawn from surface and groundwater and the use of soil water (in agricultural production).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