Rhizobium gallicum as an efficient symbiont for bean cultivation Bacem Mnasri, Fatma Tajini, Mustapha Trabelsi, Mohamed Elarbi Aouani and Ridha Mhamdi Agron. Sustain. Dev., 27 4 (2007) 331-336 Published online: 18 December 2007 DOI: 10.1051/agro:2007024