Characteristics of fertility and enzyme activity of soils in sewage irrigated fields
GUO Xiaoming, MA Teng, CHEN Liuzhu, CUI Yahui, LIAO Yuan, DU Peng
Ecology and Environment . 2012, (1): 78 -83 .  DOI: 10.16258/j.cnki.1674-5906(2012)01-0078-06

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