To research the crop potential productivity can find the obstacle to improve yield, and can offer grounds for programming agricultural production. The temperature and climate potential productivity of Changwu experimental district in many years are compared with practical yield of winter wheat and spring maize. The results show that the wheat average heat potential productivity of the district in many years is 6 910.5 kg/hm 2, that of maize 10 718.6 kg/hm 2, the variance between years is not big. The wh...
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