The resources, environment and production benefits in two crops a year region are analyzed systematically.

系统地测定与分析了一年两熟地区的资源与环境效益和生产效益。

youdao

The Dali fields are very fertile yielding two crops a year, the principal crops being rice, wheat, beans, rape, maize and tobacco.

大理的土地非常肥沃，在这里栽种粮食可以一年两熟，这里的主要作物有大米、小麦、豆类、油菜、玉米和烟草。

youdao

Conservation tillage has been used and spreaded in regions of two crops a year in recent years. Evident effects and some experience have been achieved.

近年来保护性耕作技术已在一年两熟地区推广应用，并获得了明显成效也取得一些经验。

youdao

It could provide much more food and cash crops too, perhaps two harvests a year, with proper irrigation.

ECONOMIST: Africa 40 years on