mproving seed production of Sweet lupin, Lupinus albus.1 .- effect of bradyrhizobium inoculation, nitrogen fertilization and plant density on seed yield and its components of Sweet White lupin grown in newly reclaimed sandy soils

abonos nitrogenados bradyrhizobium caracteres de rendimiento composante de rendement engrais azoté inoculación inoculation lupinus albus nitrogen fertilizers plant population población vegetal population végétale reclaimed land rendement rendimiento sandy soils seed semence semillas sol sableux suelo arenoso terre récupérée tierras rehabilitadas yield components yields