Clustering analysis is a new, reasonable and effective method in soil study.

聚类分析方法是土壤研究中的一种合理有效的新方法。

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It is precise for unsaturated soil study to use suction as parameter, however, that brings much difficulty.

考虑吸力的非饱和土研究较为精确，但吸力量测起来比较困难。

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In recent years, the agricultural soil study of the Loess Plateau is mainly focused on long-term fertilization effects on soil moisture, soil fertility, and crop yield.

近年来人们对黄土高原地区农业土壤的研究主要集中在长期施肥对土壤中含水量、土壤肥力、农作物产量等的影响。

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LCROSS will then study the soil thrown up to ten kilometers above the lunar surface before it too crashes into the moon.

VOA: special.2009.09.30

Another recent study found that a single tillage does not harm yield or soil structure in land that is normally not tilled.

VOA: special.2010.09.28

They also will study chemical and physical properties of the soil samples with a method called infrared spectroscopy.

VOA: special.2009.01.20

This document presents the design and evaluation of a rain simulator to study soil losses and runoff generation in erosion plots located in hilly bared soil.

UNESCO: AQUATACAMA

Phase II, planned for 2011, will identify both aquifers down to 3, 000 meters below the surface, study soil composition and aquifer replenishment, and prioritize areas for agricultural development.

UNESCO: launches initiative to identify groundwater and alleviate water shortages in Iraq | United Nations Educational, Scientific and Cultural Organization

But the Soil Association said the study was flawed.

BBC: Organic food 'not any healthier'