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在中央黑土地带的杨树纯林中,杂草滋生,干燥的夏季土壤表面深度龟裂,在融雪或夏季暴雨时分布在靠近地表的根系就会裸露出来。所有这些因素都使
In poplar pure forests in central black soil, the weedy, dry summer depths of soil are deeply cracked, and the root system near the surface is exposed during snowmelt or summer heavy rains. All of these factors make it