Based on data of the long-term fertilizer experiment of plain field,sloping field and terrace on Ansai station in loess hilly region,the nutrient cycling and balance characteristics of different farmland types were(quantitatively) analyzed.The result showed that N surplus amount of plain field was 10.22 kg/(hm~2·a),while P_2O_5 was(56.57) kg/(hm~2·a).N deficit amount of sloping field was(10.2) kg/(hm~2·a),while P_2O_5 was(56.6 kg/(hm~2·a)).N surplus amount of terrace was 104.9 kg/(hm~2·a), while P_2O_5 was ...
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