渭北旱塬冬小麦产区提前深耕一次深施肥料的肥水效应与理论分析
위북한원동소맥산구제전심경일차심시비료적비수효응여이론분석
Effect.of water-fertilizer and theoretical analysis of deep plough-deep fertilization at one earlier time in winter wheat-growing regions of Weibei rainfed croplands
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