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策1翔黄土高原南部作物水肥产最效应的田间研究·····················……李玉山张孝中郭民肮(1,水稻土物理性质空间变异性研究················································……吕军俞劲炎(8)土坡
QI 1 Xiang Field research on the most effect of crop water and fertilizer on the southern loess plateau ················································ Spatial Variability Research ································································································· ·· ...... Lu Jun Yu Jinyan (8) Soil slope