脉位取样器;
As the result of the co-action of the erect stubble and vegetation cover, The position that the maximum soil wind erosion amount for conservation tillage farmland measured by sand sampler located in the height range of 18~ 40cm.
由于直立残茬和植被覆盖的共同作用结果,风洞集沙仪收集的保护性耕作农田最大土壤风蚀量集中在距地表18~40cm的高度范围内。
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