title: Influence of biosolids compost on the bradyrhizobial genotypes recovered from cowpea and soybean nodules.
abstract: The interaction of biosolids compost application to soil and bradyrhizobial genotypes recovered from nodules was examined. Among 170 isolates, seven genotypes were recovered from soils receiving either no biosolids application or rates of 73 or 146 Mg/ha for three successive years. With the exception of one genotype, the distribution of the bacterial genotypes recovered from nodules was interrelated with the level of biosolids. Two of the genotypes nodulated both soybean and cowpea. Because soybean-nodulating bradyrhizobia were not recovered from control plots, it is possible that they had been introduced together with the biosolids compost application.
authors.affiliation: Division of Science and Mathematics, Department of Biological and Environmental Sciences, University of District of Columbia, 4200 Connecticut Avenue, NW, Washington, DC 20008 USA.
authors.forename: Carolyn
authors.initials: C
authors.lastname: Cousin
authors.forename: Jean
authors.initials: J
authors.lastname: Grant
authors.forename: Freddie
authors.initials: F
authors.lastname: Dixon
authors.forename: Desta
authors.initials: D
authors.lastname: Beyene
authors.forename: Peter
authors.initials: P
authors.lastname: van Berkum
mesh_terms: D001673:Biodegradation, Environmental; D020369:Bradyrhizobium / Q000145:classification / Q000235:genetics* / Q000254:growth & development / Q000302:isolation & purification*; D016172:DNA Fingerprinting; D007887:Fabaceae / Q000378:metabolism* / Q000382:microbiology*; D005308:Fertilizers / Q000382:microbiology; D005838:Genotype; D009586:Nitrogen Fixation; D016133:Polymerase Chain Reaction; D013025:Glycine max / Q000378:metabolism* / Q000382:microbiology*
chemical_list: D005308:Fertilizers