primary soil

The seepage and erosion are primary dynamic influence factors on bank failure; and the soil composition, soil distribution and slope angle of bank are primary internal influence factors on bank failure.

指出了坡内的渗流作用与坡前水流的冲刷作用是岸坡发生崩塌的主要动力因素，而岸坡土体的物质组成和分布、岸坡坡度等则是岸坡发生崩塌的主要内在因素；

Primary soil investigation report of urban greenery

城市园林绿地土壤调查简报

The whole amount of soil erosion comprises primary and new soil erosion amount.

公路沿线原地貌水土流失量及新增水土流失量之和即为全部的水土流失量.

OBJECTIVERhizosphere soil extract was analyzed to get some primary information about rubber trees root exudates.

对橡胶树根际土壤浸提液进行了检测分析,以对橡胶树根系分泌物的组成进行初步探索.

The primary parameters including exchange sodium percentage ( ESP), total alkalinity, pH and soil salt content of soda solonetz in the Da'an city were calculated.

对大安市苏打碱土的主要碱化特征参数：土壤碱化度（ESP）、总碱度、pH等指标进行了测试分析。

Comprehensive analyzing the investigation result of soil and water conservation practice at 72 small watersheds in the black soil region of northeast China, the criteria of soil loss tolerance and soil loss control has been constituted for the primary soil erosion typical areas.

综合考虑对黑土区内72条小流域水土保持实践的调查结果，初步确定了东北黑土区主要水土流失类型区土壤容许流失量指标及水土保持治理指标。

Primary Research on Soil Enzymes Runoff Rules from Sloping Field

坡地土壤酶流失规律初探

Primary Discussion on Soil Erosion Investigation Using Aerial Radioactive~ ( 137) Cs Survey Approach

土壤侵蚀调查中的航空~（137）Cs测量方法初探

Analyzing the sandstorm, the experts and scholars in our country have recognized that, the main reason of sandstorm happens is the increasing expansion of desertification land and the primary sector forming desertification of land is the soil wind erosion.

专家学者研究沙尘暴发生的原因认为，我国沙漠化土地面积日益扩大是沙尘暴发生的重要因素，而土地沙漠化的首要环节是土壤风蚀。

Studies on Algae Population and Primary Productivity in the Fishpond in the Coastal Saline Soil

海涂盐土围塘养鱼后水体藻类种群及初级生产力研究

And we applied lab incubation method to incubate primary soil samples and the method of collecting and analyzing soil samples to study soil nitrogen mineralization and dynamics of soil mineralized nitrogen, respectively.

采用室内原状土矿化培养法和野外采样分析的方法分别对土壤氮矿化和矿质氮的动态进行研究。