播期调整对黄土高原半干旱区春玉米产量和品质的影响

周忠文, 齐月, 刘英, 雷俊

Effects of Sowing Schedule Adjustment on Yield and Quality of Spring Maize in Semi-arid Zone of Loess Plateau

ZHOUZhongwen, QIYue, LIUYing, LEIJun