01014nam a2200205 a 450000100080000000500110000800800410001910000190006024500790007926000910015852003950024965000160064465000120066065000290067265000230070170000260072470000220075070000170077270000190078918551012010-11-05       2010    bl uuuu     u00u1 u    #d1 aMATA, W. M. da  aEffect of green manure species and their sowing dates on common bean crop.  aAnnual Report of the Bean Improvement Cooperative, v. 53, p. 254-255, Mar. 2010.c2010  aNitrogen is the most required nutrient by common bean (Phaseolus vulgaris L.). Although common bean can obtain this nutrient from atmosphere by the biological nitrogen fixation (BNF) process, the fixed amounts are not enough to supply all plant necessities. Under agroecological production systems, part of the required N could be supplied by green manures as an alternative to fertilizers.  aAdubo verde  aFeijão  aFixação de nitrogênio  aPhaseolus vulgaris1 aFERREIRA, E. P. de B.1 aBARBOSA, L. H. A.1 aKNUPP, A. M.1 aDIDONET, A. D.