Forest vegetation can ameliorate obviously eco environment, prevent land deterioration, improve the content of soil organic matter and available N, K, and drop soil pH and bulk density, add remarkably the quantity of water aggregate(>0.25 mm) and micro aggregate(>50 μm) of soil, which can make soil construction better, improve the capacity of providing nutrient and water, enhance the formation of clay and more solidity, increase soil anti erodibility and anti scourability and decrease effectively ...
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