01479naa a2200289 a 450000100080000000500110000800800410001902200140006002400530007410000230012724501540015026000090030452005190031365000210083265000560085365300190090965300220092870000250095070000200097570000220099570000200101770000240103770000260106170000250108770000250111277300520113721099712019-11-19       2019    bl uuuu     u00u1 u    #d  a0006-87057 ahttp://dx.doi.org/10.1590/1678-4499.20180532DOI1 aFERREIRA, P. A. A.  aNew rhizobia strains isolated from the Amazon region fix atmospheric nitrogen in symbiosis with cowpea and increase its yield.h[electronic resource]  c2019  aStudies in the Amazon indicate a wide diversity of rhizobia with the ability for biological nitrogen fixation (BNF), which could expand the number of strains approved for cowpea. Thus, the aim of this field study was to evaluate the agronomic performance in cowpea of the several strains isolated from the soils of the Brazilian states Acre and Rondônia, and to compare them withstrains approved by the Ministry of Agriculture (MAPA) and withnon-inoculated controls (without and with mineral nitrogen fertilizer).  aSeed inoculation  aVigna unguiculata subsp. unguiculata var. spontanea  aAmazon strains  aRhizobial strains1 aPEREIRA. J. P. A. R.1 aOLIVEIRA, D. P.1 aVALE, H. M. M. do1 aJESUS, E. da C.1 aSOARES, A. L. de L.1 aNOGUEIRA, C. de O. G.1 aANDRADE, M. J. B. de1 aMOREIRA, F. M. de S.  tBragantiagv. 78 n.1, p. 38-42, Jan./Mar. 2019.