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Study on Spatial Variability of Soil Nutrients in Purple Soil Hilly Region -Take Tongliang in Chongqing as an Example
张倩 胡胜勇 高明 徐畅 王龙
Chinese Agricultural Science Bulletin . 2011, (20): 216 -223 .  DOI: 10.11924/j.issn.1000-6850.2011-0411