cultivated black soil

基本解释

Since fresh black soil was cultivated, soil fertility has showed a decreasing trend.
黑土开垦种植后，土壤肥力呈下降趋势。
To distinguish effects of soil factors and space factors, the experiment was conducted in black soil area, and soybean plants were cultivated with a model of different rages of sash.
为了从理论上区分土壤因子和空间因子的作用，试验采用框栽的方法控制土壤面积，研究了增大空间因子对生长在不同土壤面积上的大豆植株的影响。
By the experiment of laboratory simulation, effect of organic C and inorganic N addition on water stability of aggregates with different particle fraction from cultivated black soil were studied.
用室内模拟试验研究了有机C、无机N添加对耕地黑土不同粒级团聚体水稳性的影响。

耕作黑土
We selected five representative regions in different latitude of cultivated black soil regions in sonnen plain,in order to reveal the differences of ecological environment,and the effects of the differences on the fauna composition.
为了解松嫩平原不同纬度耕作黑土的环境差异及其对土壤动物群落组成的影响,2009年5月、8月、10月在松嫩平原(黑龙江省境内)选取5个代表性耕作黑土土壤动物群落进行研究。