It is important to the national economic plan to forecast crop yields scientifically and accurately.

科学准确地预测粮食产量，对于制定国民经济计划十分重要。

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Accurate forecast of wheat harvest period is the premise to obtain uttermost crop yields. The phonological sequentiality and synchronization could be applied to forecast the growing season of crops.

可靠准确的小麦收获期预报是适时收获、最大限度获取产量的前提，物候现象出现的顺序性和同步性，可用来预测作物生长期。

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OMAHA, Nebraska (Reuters) - The most extensive drought in five decades has left corn plants withered and dying, and crop yields in the largest producing states will be much lower than experts have forecast, scouts said on Friday as they completed a U.S. Midwest crop tour.

MSN: Drought slashes Midwest corn crop