For example, the farmland of winter wheat should be reduced in northern China, while southern China, rich in water resources, should maintain multi-cropping.
例如，中国北方的冬小麦农田应该减少，而在水资源丰富的中国南方应该维持多茬复种。
Soil denitrification was studied in winter wheat-summer maize rotation cropping system with an aquic cambisol.
在北京潮土上研究了冬小麦-夏玉米轮作体系下土壤氮素反硝化损失。
In the model, the leaf area index (LAI), crop coefficients, and root penetration and distribution were simulated for the winter wheat and summer corn double cropping system.
模型对冬小麦—夏玉米轮作体系作物叶面积指数、作物系数、根系生长与分布进行了模拟。
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