但是苜蓿地土壤ph值比棉花连作地的高。
But alfalfa ground soil PH value were higher than cotton ground.
不同种植年限苜蓿地土壤微生物量碳、氮存在差异。
There were obvious difference on soil microorganism carbon and nitrogen among different alfalfa grounds.
春季苜蓿地土壤风蚀量仅为玉米地的41.81%。
The deflation of alfalfa field is only (41.81%) of that of corn field in spring.
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