典型土壤选择草甸土、黑钙土、草甸碱土三种。

Selected soils are meadow soil, Black Calcium soil, and meadow alkali soil, respectively.

通过两年的盆栽试验，研究了有机物料对黑钙土的培肥作用。

The effect of application of organic materials on improving the fertility of Chernozem was studied with two-year pot culture experiments.

通过黑钙土的培养试验，研究了不同作物根茬施入土壤后对土壤腐殖质的影响。

This paper studied the effects of different crop stubbles put in soil on soil humus by cultural experiment of churnozem.

黑钙土样地选择在大田，草甸土选择在羊草自然保护区内，草甸碱土选择在退化草地碱斑部位。

The Black Calcium soil plots were conducted in farmland, the meadow soil in the Natural Reserves, and the meadow alkali soil in the degraded grassland with saline bowls.