cultivated black soil

常见例句

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。