01934naa a2200361 a 450000100080000000500110000800800410001902400390006010000180009924501230011726000090024052009270024965000150117665000100119165000220120165000150122365000150123865000190125365000120127265000290128465000130131365000160132665000230134265000100136565300200137570000170139570000210141270000160143370000150144970000240146470000220148877300620151012090832022-05-04       2003    bl uuuu     u00u1 u    #d7 a10.1016/S0378-4290(03)00037-62DOI1 aGRAHAM, P. H.  aAddressing edaphic constraints to bean productionbthe Bean/Cowpea CRSP project in perspective.h[electronic resource]  c2003  aEdaphic factors constrain bean production in most areas where this crop is grown. They include nutrient constraints particularly N and P deficiency, soil acidity including Al and manganese toxicity, and drought. The Bean/Cowpea Collaborative Research Support Program (CRSP) has supported research on edaphic constraints to bean production since its inception, the major partnerships involving the University of Wisconsin and EMBRAPA, Brazil (1981-1989) and the University of Minnesota and INIAP, Ecuador (1989-2002). Research over this period has emphasized cultivar and strain variation in nodulation and nitrogen (N2) fixation, host strain interaction and coevolution, host and strain tolerance of soil acidity and nitrogen fixation under phosphorus limited conditions. This paper reviews recent developments in these areas of nitrogen fixation research, but does so from the perspective of the Bean/Cowpea CRSP project.  aAcid soils  aBeans  aNitrogen fixation  aNodulation  aPhosphorus  aAcidez do Solo  aFeijão  aFixação de Nitrogênio  aFósforo  aNodulação  aPhaseolus Vulgaris  aZinco  aZinc deficiency1 aROSAS, J. C.1 aJENSEN, C. E. de1 aPERALTA, E.1 aTLUSTY, B.1 aACOSTA-GALLEGOS, J.1 aPEREIRA, P. A. A.  tField Crops Researchgv. 82, n. 2-3, p.179-192, May 2003.