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Effects of pre-sowing soybean seed inoculation with Bradyrhizobium japonicum alone or with mixed inoculants containing soybean rhizobia and Azotobacter chroococcum were compared. In the pot experiment all the tested strains of soybean rhizobia in pure cultures or in mixtures with A. chroococcum significantly improved nodulation of soybean plants and seed yields of this crop. In micro-plot experiments...
Liquid media containing potato extract and 1% of glucose or sucrose were used to culture root-nodule bacteria (rhizobia) in shaken Erlenmeyer flasks. For comparison, these bacteria were also cultured in yeast extract-mannitol broth (YEMB) as a standard medium. Proliferation of rhizobia was monitored by measuring optical densities (OD₅₅₀) of the cultures and by plate counting of the viable cells (c...
Two soils were kept moist at 4°C, -20°C or air-dried at 20-22°C and after one week, one month, two months and six months of storage at these conditions changes in soil populations of Rhizobium leguminosarum bv. trifolii (Rlt) and Rhizobium leguminosarum bv. \iciae (Rlv) were examined. In one air-dried soil (from Grabów) markedly lower numbers of both Rlt and Rlv., as compared to the refrigerated or...
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