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Hairy vetch (Vicia villosa Roth, HV) is widely grown as a legume cover crop throughout the U.S.A., with biological nitrogen fixation (BNF) through symbiosis with Rhizobium leguminosarum biovar viciae (Rlv) being one of the most sought after benefits of its cultivation. This study determined if HV cultivation history and plant genotype affect genetic diversity of resident Rlv. Soil samples were collected...
The inhibitory effects of heavy metals upon microbial populations and the factors limiting microbial activity and growth were determined in soils that had been contaminated with lead (Pb) or chromium (Cr) for more than 40 years. Total Cr and Pb concentrations were 260,000 and 10,000mgkg -1 soil in Cr- and Pb-contaminated soils, respectively. The tolerance of bacteria extracted from soil...
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