02053naa a2200301 a 450000100080000000500110000800800410001902200140006002400320007410000200010624500980012626000090022452011570023365000210139065000250141165000250143665000200146165000120148165000230149365300190151665300080153565300320154370000200157570000260159570000170162170000210163877300920165920599232017-01-26       2016    bl uuuu     u00u1 u    #d  a1991-637X7 a10.5897/AJAR2016.116892DOI1 aSOUSA, F. F. de  aLegumes as green manure for common bean cultivated in two growing seasons at southeast Brazil  c2016  aThe use of legumes in pre-cultivation on the common bean has the possibility of providing atmospheric N to the soil, making it available to this crop, and may cover part of its N demand and increase grain yield. The objective of present study was to evaluate the effect of hyacinth bean and jack bean as green manures on the production of common bean grown in two seasons. Cover crops were evaluated for fixed N2, dry matter yield, nitrogen (N) and carbon (C) concentrations, C:N ratio and N accumulation in the shoot. The jack bean accumulated higher biomass and more total N than hyacinth bean and spontaneous vegetation (control). However, both legume species, when used as green manure, resulted in an increase in the N concentration of common bean. Compared to the spontaneous vegetation, hyacinth bean residue increased yield of common bean by 32% and jack bean residue increased the bean yield by 46%. These yields were recorded when common bean was cultivated a few weeks after residues incorporation into the soil and about seven months later, thus showing a flexibility to family farmers for making their decisions on the best cropping season  aAdubação Verde  aAgricultura Familiar  aCanavalia Ensiformis  aDolichos Lablab  aFeijão  aPhaseolus Vulgaris  aFamily farming  aFBN  aSymbiotic nitrogen fixation1 aCARMO, D. L. do1 aCARNEIRO, J. E. de S.1 aURQUIAGA, S.1 aSANTOS, R. H. S.  tAfrican Journal of Agricultural Researchgv. 11, n. 49, p. 4953-4958, 8 December, 2016.