Common bean (Phaseolus vulgaris L.) plays key social and economic roles on the Brazilian society, since it is an important source of protein for the poorer population (SILVA and DEL PELOSO, 2006). On common bean cropping, green manures may reduce or eliminate the use of N fertilizers, ensuring the conservation of the natural resources and reducing production costs. Besides, the use of green manure associated to conservative management practices increase soil organic matter, which contribute to a more sustainable agriculture.
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