Survival and nodulation of Bradyrhizobium japonicum strain CJ02 on soybean (Glycine max (L.) Merrill) (cv. Cujut) cultivated on ferrasols (in pots experiment)

A pot-experiment was conducted to study the effect of carboxyl methyl-cellulose (CMC), ash (byproduct from cooking) and organic matter (compost) on survival of Bradyrhizobium japonicum strain CJ02, growth and yield of soybean (cv. Cujut) cultivated on ferrasols. Results indicated that CMC, ash and organic matter affected to the survival of bradyrhizobia and good nodulation (number of nodule and dry weight of nodule) significantly. Besides, the increases in plant height, shoot dry weight, pod dry weight, yield, and quality of soybean seed were also recorded as comparing with the control and Bradyrhizobium inoculation. However, Bradyrhizobium inoculation significantly increased plant height, shoot dry weight and pod dry weight in comparison with the control. Application of Bradyrhizobium [with CMC] inoculation plus ash and organic matter could be a useful practice, sustaining the growth and yield of soybean cultivating on ferrasols.