Effect of phosphorus deficiency on the growth, symbiotic N2 fixation and proton release by two bean (Phaseolus vulgaris) genotypes Caixian Tang, Philippe Hinsinger, Benoît Jaillard, Zed Rengel and Jean-Jacques Drevon Agronomie, 21 6-7 (2001) 683-689 DOI: 10.1051/agro:2001161