soil variation

Based on the analysis of change of soil water potential ( SWP) and soil temperature ( ST), we researched the daily trunk diameter variation ( DTDV) and trunk diameter variation ( TDV) of peach in winter.

在分析空气温度、土壤水势以及土壤温度生态因子变化的基础上，研究了桃树茎干日变化规律以及冬季桃树的茎干变化。

Principal component analysis was used to derive soil fertility variation factors.

运用主成分分析选取土壤肥力变异因子.

The numerical analysis method is used to study the ground movement laws caused by the ovalization variation in the cross section in the action of water and soil pressure of tunnel lining.

第一部分介绍了软土盾构隧道施工引起的地层位移和地表沉降的研究方法，包括经验方法、解析方法、整体有限元方法以及位移控制有限元法。

Seasonal variation of soil biomass plays an important role in the carbon cycle of terrestrial ecosystem.

土壤微生物量的季节变化在陆地生态系统碳循环方面具有重要作用.

Preliminary investigation on time and space variation of structure of soil fauna community in artificial and secondary forests of Xishuangbanna

西双版纳热带人工林与次生林土壤动物群落结构时空变化初查

Space variation law of physical characteristics about farmland soil due to mining subsidence

开采沉陷对耕地土壤物理特性影响的空间变化规律

Effects of time-variation of geomorphologic and geologic factors on soil erosion

下垫面因素对产沙时变影响分析

The coefficient of variation in SOC among soil types was also great, with the highest in mountain acid brown type ( 95.42%), and with the smallest in mound lime concretion black soil type ( 18.92%).

土类的有机碳变异性也极大，变异系数以山地酸性棕壤类最大，达95.42%，最小的是岗地砂姜黑土类，为18.92%。

The change of soil physicochemical properties was obvious with the time variation of weathered coal applying.

3风化煤施用对土壤理化性质的影响随风化煤施用时间的变化而显著变化。

Zaw of Variation of Soil Respiration Rates in Warm Temperate Forests with Forest Types

暖温带森林土壤呼吸随林分类型及其微生境因子的变异规律