crop rotation system on farms 农场轮作制度
early crop rotation system 早期轮作制
typical crop rotation system 典型轮作制
multiple crop rotation system 多区轮作制
rational crop rotation system 合理轮作模式
crop-pasture rotation system 草田轮作系统
The location tests of different blend ratio between controlled-release urea and conventional urea in wheat-corn crop rotation system in Xinpo Village Zhumadian city are studied.
在驻马店新坡村进行了小麦一玉米轮作制下的控释尿素与普通尿素掺混比例定位试验研究。
Between 1000 and 1300 Europe's urban population more than doubled, to about 70m (thanks partly to a new system of crop rotation, made possible by better tools).
公元1000年和1300年间，欧洲城市人口翻了一倍多，达到7千万人(与改良工具后人们运行了新式的轮作系统有关)。
But the system has also encouraged farmers to alter time-honored crop rotation practices and the mix of herbicides that previously had kept weeds in check.
但是该体系鼓励农民改变长期以来的轮作制度和混合使用除草剂，在以前这些方法很好的控制了杂草。
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