Search for: [Abstract = "Successful nodulation of legumes by Rhizobium is a complex process that in open fielddepends on various environmental and biological factors. Generally legume productivity may beimproved by inoculation with selected, highly effective in diazotrophy root nodule bacteria. However, field legume inoculation with Rhizobiaceae species is very often unsuccessful due to thepresence of native strains in soil which are better adapted and usually dominate over introducedbacteria. The ability of one strain to outnumber others in nodule occupancy is commonly termedcompetitiveness. This feature of strain is genetically regulated by numerous bacterial genes, aswell as it is highly dependent on host plant genotype and environmental cues. The competitiveness of endogenous strains is critical for the successful use of inocula to introduce the qualitystrains. In this paper we describe ways and means which should be considered in order tomanipulate both established and introduced strains ecologically, edaphically and genetically toimprove legume productivity and, as the consequence, soil fertility."]

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