grain yield fluctuation 粮食产量波动
average yield fluctuation 平均产出能力变化
yield fluctuation expressed 产量波动性
that yield fluctuation expressed 产量波动性
fluctuation of husking yield [粮食] 脱壳率波动度
The result showed that the grain yield fluctuation had stage variation characteristics.
森林的过量采伐导致区域气候变化，进而引起粮食产量的变化。
The results show that there is a 3-year period of precipitation field and autumnal careal yield fluctuation in Guizhou province.
结果表明，贵州降水与秋粮产量存在着3年左右的显著周期。
Compared to Guyuan, spring wheat yield at Yulin and Haiyuan was lower, yield fluctuation was stronger and soil desiccation rate was faster.
与固原相比，榆林和海原连作春小麦产量较低，产量波动性较大，春小麦田干燥化进程较快。
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