欢迎访问《农业工程》杂志社！ 关键词： 黑龙港；夏玉米；氮；磷；钾[gap=1230]Key words： Heilonggang, Summer-sown Corn, Nitrogen, Phosphorus, Potassium
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The experiment was conducted using fild and pot method in 2002 and2003 in summer maize field of Dezhou City.
试验在山东省德州市夏玉米田进行。
参考来源 - 山东省夏玉米田杂草生态经济指标的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
麦秸和残茬覆盖对夏玉米农田小气候的影响。
Effects of straw and residue mulching on microclimate of summer corn field.
灌水定额对夏玉米叶面积和株高有显著影响。
Irrigating water quota has a remarkable effect on leaf area and plant height.
冬小麦和夏玉米是关中地区最主要的粮食作物。
The winter wheat and the summer corn are the Guanzhong area most main grain crops.
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