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Abstract
The research was carried out at the Faculty of Agriculture, University of Benin to investigate the availability of soil phosphorus resulting from microbial inoculation in an Ultisol with maize as the test crop. The experiment was laid out in a Randomized Complete Block Design (RCBD) in three replications comprising; T1 (control), T2 (NPK15:15:15) and T3 (NPK15:15:15 + Bacillus sp)., to give a total of nine experimental plots measuring 2.5m x2.5m used for the investigation. Results from the work showed a significant effect (P=0.05) of NPK + Bacillus sp on the grain yield (8.7g/18.75m2) of maize than that of the uninoculated treatments (7.7g/18.75m2- 6.6g/18.72m2); while no significant differences were observed in the plant parameters measured until week8 where the leaf area (509.0 cm3) of the inoculated plants (T3) was significantly better than the values observed for T1 (350.7 cm) and T2 (420.3cm) respectively.
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