blackland planter 重粘土田播种机 ; 重粘土用播种机
blackland planting 重粘土地播种
blackland plow 黑沾土犁 ; 黑粘土犁
blackland plough 黑粘土犁 ; 重粘土地用犁
blackland area 黑土区
blackland mouldboard 重粘土犁壁
blackland bottom plow 重粘土用有壁犁
blackland bottom plough 黑粘土铧式犁
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。
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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