With the changes of the global climate, cultivation methods and release of new varieties, the maize diseases have changed in recent years in China.
随着全球气候变化、耕作方式改变和新品种推广，我国玉米病害的发生也有所改变。
The purpose of this experiment is to screen and select new soybean varieties for wide-ridge , narrow-row and dense-planting cultivation.
本试验的目的就是要筛选出适合大垄窄行密植栽培的大豆新品系。
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