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Effects of Combined Application of N, P, K on the Quantity and Correlations of Soil
Zhan Fangdong, He Yongmei, Zu Yanqun, Li Yuan, Han Mingzhu
Chinese Agricultural Science Bulletin . 2010, (10): 171 -176 .  DOI: 10.11924/j.issn.1000-6850.2009-1982