Means and standard errors (in parentheses) of NO3--N, SON (soil organic nitrogen), fertilizer inputs, and biomass of red clover, rye, corn and soybean in the studied managements across the studied 20 fields.
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* Different lowercase letters in each row within each management mark significant differences among the topographical positions (p<0.05). Data are averages from 2011–2013.
创建时间：
2015-11-23
