Effect of Rhizobium inoculation, organic and chemical fertilizers on proximate composition, in vitro protein digestibility, tannin and sulphur content of faba beans

abonos abonos nitrogenados abonos sulfurados aves de corral azote azufre chemical composition composition chimique contenido proteico digestibilidad digestibility engrais faba beans farmyard manure fertilizers fumier graine haba in vitro experimentation inoculation inoculation methods nitrogen nitrogen fertilizers nutritive value poultry protein content proteine proteins rhizobium leguminosarum seed seeds semence semilla semillas soufre sulphur sulphur fertilizers taninos tannin tannins valeur nutritive valor nutritivo vicia faba volaille