On the other hand, low PTTN at high N application could be related with the inhibitory effect of N application on nodulation and N2 fixation of common bean in this soil, as has already been indicated by Herridge and Brockwell (1988).
Similarly, inhibition effect of higher N application on nodulation and nitrogenase enzyme without affecting grain yield was previously determined by Rai [23].
The effect of Rhizobium inoculation on nodulation of common bean appears to depend on the type of soil.
Similarly, the effect of inoculation on nodulation of common bean varied due to different indigenous rhizobial population, as previously observed by Asad et al. [15].
Still considering nodulation phenotype, in S. meliloti the nodD2 gene did not have any apparent effect on nodulation of either alfalfa or sweet clover [ 37].
In general, organic fertilizer applications are relevant to boost the effectiveness of Bradyrhizobium on nodulation and yield of peanut in degraded and sand soil of eastern Ethiopia.
An investigation was carried out to evaluate the effect of the integrated application of organic and inorganic fertilizer effect on Bradyrhizobium effectiveness on nodulation and yield of peanut at the major growing areas of Eastern Ethiopia, Babillae and Fedis sites.
The specific objectives of the study were to compare the effect of combined application of different organic input and inorganic fertilizer with Bradyrhizobium inoculation on nodulation and yield of peanut and to assess how these inputs influence selected soil properties.
Hence, this study was initiated to evaluate the effect of genotypes, Rhizobium inoculation and environmental locations on nodulation and productivity of common bean in major common bean growing areas of eastern Ethiopia.
Under field conditions, the effect of different application rates (100 1000 kg ha−1) of RP-EC with PSM and with a combination ratio of RP and compost (50 50 W/W), applied 7 days before sowing, on nodulation, growth and productivity of chickpea compared to control (60 kg P ha−1 using DAP) was investigated at the University research farm.
