In addition, plant root can also influence soil structure and water content, so the influence of plant root on the soil potential should not be neglected.
另外由于植物根系影响土壤结构与含水率，所以根系对土壤水势的影响也不可忽略。
Three pipeline coating detection technologies, multiple-frequency current method, ground potential-electrical field method, and pipe-to-soil potential method, are introduced.
本文在分析国内外现有的防腐层检测技术的基础上，提出了地下金属管线防腐层状态检测的新方法----电流梯度法。
The potential for carbon sequestration in the soil is estimated at 5.5 gigatons annually with good land management practices, equivalent to 13% of current emissions from all sectors.
据估计，在良好的土地管理实践中，每年土壤中碳潜在的封存量是55亿吨，相当于来自所有部门的温室气体排放量的13%。
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