典型黑土春玉米化学肥料养分利用效率变化研究
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Nutrients Use Efficiency Change of Chemical Fertilizers for Spring Maize in a Typical Black Soil
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图1. 哈尔滨2013—2016年月平均温度和月总降水量 |
Fig. 1. Month mean temperature and month total precipitation in Harbin from 2013 to 2016 |
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