an aqueous - based inoculant composition in liquid form for leguminous seeds that produces an immediate nodule formation and an increased nitrogen fixation , containing microorganisms of the rhizobium or bradyrhizobium genus , a molybdenum compound selected from alkali metal molybdates and a compound that neutralizes the seed exudates , which are toxic for the bacteria , selected from polymers of compounds presenting an amide , amine or imine moiety . the inoculant composition remains stable at room temperature , keeping the number of viable bacteria over long periods of time and ready to be used .