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渭北旱塬苹果园土壤深层干燥化与硝酸盐累积
樊军, 邵明安, 郝明德, 王全九
Desiccation and nitrate accumulation of apple orchard soil on the Weibei dryland
FAN Jun, SHAO Mingan, HAO Mingde, WANG Quanjiu
应用生态学报 . 2004, (7): 1213 -1216 .