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1SOIL BIOLOGICAL AND BIOCHEMICAL QUALITY OF WHEAT-MAIZE CROPPING SYSTEM IN LONG-TERM FERTILIZER EXPERIMENTS

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来源：EXPERIMENTAL AGRICULTURE

关键词： phosphorus: 7723-14-0 urease: 9002-13-5 EC 3.5.1.5 potassium: 7440-09-7 dissolved organic carbon total organic carbon total nitrogen chemical fertilizer soil enzyme alkaline-hydrolysable nitrogen biological activity soil quality enzyme activity biochemical activity soil bulk density metabolic quotient physical-chemical property

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