1. The utility model relates to a blackland and clay root and stem crop ditch loosening machine for loosening soil.
本实用新型涉及一种疏松土壤的黑粘土地根茎作物沟土疏松机。
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2. The 1 million farmers here ever were this blackland ground to win completely homebred grain with arduous sweat the reputation of the biggest county.
这里的百万农民曾用辛勤的汗水为这块黑土地赢得全国产粮第一大县的声名。
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3. Rhizo-box and field cultivation methods were used to study the delpletion and accumulation of organic P in maize rhizosphere on blackland and chernozem.
利用根盒培养和田间栽培方法，研究了黑土和黑钙土玉米根际有机磷的亏缺和积累的状况。
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4. Rhizo-box and field cultivation methods were used to study the delpletion and accumulation of organic P in maize rhizosphere on blackland and chernozem.
