“平面型”犁底层剖面构造有利于改善土壤结构。
The plow pan profile constitution of the flat type helps to improve soil structure.
黑土耕层各复合体中有机碳含量均明显减少，犁底层亦表现出降低的趋势。
The organic carbon content in each organic-mineral complex of tillage layer is decreasing obviously with tillage period increasing, and that also has a decreasing trend in below plough layer.
黑土耕层各复合体中有机碳含量均明显减少，犁底层亦表现出降低的趋势。
The organic carbon content in each organic-mineral complex of tillage layer is decreasing obviously with tillage period increasing, and that also has a decreasing trend in below plough layer.
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