rice field and upland field rotation

• 水旱轮作

rice field and upland field rotation的用法和样例：

例句

1. In cultivated land systems, the upland soil physical fertility increased with the cultivation, but the upland crops-rice rotation has a disadvantageous effect.
   耕地土壤的物理学肥力随着旱耕熟化过程而增加，但是水旱轮作过程对其有不利的影响。