It increased plough layer soil water and available nutrients content.
大豆覆膜增加了土壤水分与速效养分含量。
A parameters identification method of the layer soil-foundation-frame interaction system is presented.
提出了一种层状地基—基础—框架相互作用系统的参数识别方法。
The research supplies a new method for quantitative study of steady phreatic evaporation of sand-layer soil.
该实验为定量研究夹砂层状土壤潜水蒸发提供了新思路。
A new analytic method for grounding resistance of compound grounding grids in two-layer soil is deduced in this paper.
提出计算双层土壤复合接地网接地电阻的新解析方法。
Through deducing the Green's function in a three level layer soil by complex image method, application of this method is clarified.
通过运用等值复数镜像法求出水平三层土壤中的格林函数，阐述等值复数镜像法的应用。
According to the failure mechanism of unsaturated expansive soil slope, the countermeasures to prevent shallow layer soil slide are suggested.
根据非饱和膨胀土边坡失稳的机理提出了防止边坡浅层滑动的对策措施。
At the initial stages of restoration, improvement on the soil biological properties by lichen and moss were represented mainly on surface layer soil.
在恢复初期，地衣和苔藓对土壤生物学性质的改善主要体现在土壤表层。
The analytic computational formula for grounding resistance of grounding rods in three-layer soil is derived based on the concept of equivalent soil resistivity.
基于等值土壤电阻率的概念，导出了三层土壤中垂直棒接地电阻解析计算公式。
Reliability calculation example shows that: in multi-layer soil pile, the reliability of a long pile bearing capacity is impacted greatest by the length of the pile.
可靠度计算实例表明，在多层土长桩承载力可靠性受桩长影响最大。
Based on the method of moment and the boundary element method, an improved method to analyze the grounding system buried in multi-layer soil with finite volumes is presented.
提出了分析含有有限体积的参数不同的材料的水平分层土壤中的接地网接地性能的方法。
Graphical method has been used to determine two layer soil parameters, but it is more difficult and the results obtamed are less accurate when the actual soil construct is complex.
长期以来人们一直采用绘图法确定双层土壤参数，然而这种方法对复杂的土壤结构误差较大，且较难实施。
The influences of the reflective coefficient of the double layer soil, the top layer soil thickness and the grounding grid area on the optimum arrangement are analyzed numerically.
论文采用数值计算的方法分析了双层土壤结构时土壤反射系数、上层土壤厚度及地网面积大小等因素对地网最优布置的影响规律。
The results showed that the compaction treatment measure conducted could be efficient to improve the moisture of the surface layer soil and improve the quality of the coal rejects reclaimed farmland.
结果表明，通过压实层处理措施可有效改善表层土壤水分，提高矸石复垦耕地质量。
The results showed that the compaction treatment measure conducted could be efficient to improve the moisture of the surface layer soil and improve the quality of the coal rejects reclaimed farmland.
结果表明，通过压实层处理措施可有效改善表层土壤水分，提高矸石复垦耕地质量。
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