1.
Characteristics of Nitrogen Content of Rhizosphere and Xerophilous Shrubs
旱生灌木根际及灌丛土壤氮素含量特征研究
2.
Distribution and Relationship of Nitrogen Content in Flue-cured Tobacco Leaf and Soil in Sanmenxia Tobacco Districts
三门峡烟区烤烟总氮与土壤氮素含量的分布特点及关系分析
3.
Contents of Active Organic Carbon, Nitrogen and Its Relationship with Nitrogen Mineralization of Soil on the Loess Plateau;
黄土区几种土壤中活性有机碳、氮含量及其与土壤氮素矿化的关系
4.
Contents and Changes of Soluble Organic Nitrogen in the Different Soils;
土壤中可溶性有机氮含量及影响因素研究
5.
Contents and Changes of Soil Microbial Biomass Carbon and Nitrogen in the Different Soils on the Loess Plateau;
黄土区不同土壤微生物量碳、氮的含量及其影响因素
6.
Prediction of soil nitrogen supply and maize yields with the relative chlorophyll contents of leaves under different climates and soil conditions
不同气候和土壤条件下玉米叶片叶绿素相对含量对土壤氮素供应和玉米产量的预测
7.
Characteristics of nitrogen content between rhizosphere and bulk soil under seven shrubs in arid desert area of China
干旱荒漠区不同灌木根际与非根际土壤氮素的含量特征
8.
given nitrogen rich organic matter in soil
在土壤中施含氮量高的有机质
9.
Maize straw returning to the field can increase the soil total nitrogen and inorganic nitrogen content.
秸秆还田增加了土壤全氮和无机氮含量。
10.
water content of soil
土壤含水量（土壤含水率）
11.
Effects of irrigation amount and stage on nitrogen accumulation,distribution,translocation and soil NO_3~--N content in high-yield wheat
灌水量和时期对高产小麦氮素积累、分配和转运及土壤硝态氮含量的影响
12.
Relationship between Microbial Biomass Nitrogen and Nitrogen Utilization of Maize
土壤微生物量氮与玉米氮素养分利用关系研究
13.
Soil Nitrogen Content and Enzyme Activity in Different Utilization Types of Land in the Upper Reaches of Lancang River
澜沧江上游不同土地利用类型土壤氮含量与土壤酶活性研究
14.
soil quality - determination of total nitrogen - modified method
土壤质量-总含氮量的测定法-修改的hjeldahl法
15.
Influence of Glutin on the Number of Microbial Population and Mineral Nitrogen Content in Soil
明胶对土壤微生物数量及矿质氮含量的影响
16.
Effect of Different Nitrogen Fertilization Rate and Irrigation Rate on Nitrate Nitrogen Concentration in Wheat-Maize Interplanting System
施氮量和灌溉量对小麦/玉米间作土壤硝态氮含量的影响
17.
Effects of Different Nitrogen Fertilization Levels on Yield of Cucumber,the Soil Nitrate-N Accumulation and the Soil Solution Nitrate-N Concentrations
不同氮肥水平对黄瓜产量、土壤硝态氮累积及土壤水溶液硝态氮含量的影响
18.
Soil drought reduced moisture content and nitrogenase activity of nodules.
土壤干旱降低田菁根瘤的含水量和固氮活性。