该地区土壤粘粒和有机质平均每100 克所具有的负电荷量分别是15.7和273毫克当量。
The mean negative charge quantity pocessed by the clay and organic material of the district in per100g is respectively 15.7 and 273mgN.
该地区土壤粘粒和有机质平均每100 克所具有的负电荷量分别是15.7和273毫克当量。
The mean negative charge quantity pocessed by the clay and organic material of the district in per100g is respectively 15.7 and 273mgN.
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