ABSTRACT
The study was done in Green hills farm located in Ologbo axis of Ikpoba okha Local Government area of Edo State. Soil samples was collected using the soil auger from different plots laid out in a Randomized Complete Block Design (RCBD). Soil sample were collected from four different treatment plots. Control, 0 kg/ha fertilizer, Single dose of fertilizer, Double dose of fertilizers treatment, based on fertilizer application. The soil was analysed for pH, organic carbon, total nitrogen, available phosphorus, and potassium And Bacteria population present in the soils from cassava farms. From the result, the pH of the soil ranged from 5.15 to 5.59, with control having the highest value, which shows that it was slightly acidic due to the leaching of some basic nutrients. The organic matter and organic carbon (20.59 g/kg and 35.49 g/kg) for the control were high when compared to the single dose fertilizer treatment which was lower with values of 12.67 and 21.81 g/kg respectively, For microbial analysis, in terms of elevation, Escherichia coli, Bacillus subtilis, Enterobacter aerogenes and Klebisella species were flat in elevation while Pseudomonas aeurgoinosa shows raised from the analysis conducted. In terms of margin, Enterobacter aerogenes, Escherichia coli and Bacillus subtilis were undulated In the margin nature while Klebisella species and Pseudomonas aeurgoinosa showed entire in terms of margin nature. From the microbial analysis, Klebisella species were the dominated bacteria population while other bacteria isolates such as Enterobacter aerogenes, Pseudomonas aeurgoinosa was affected in terms of phenotypic virulence due to herbicide application across all treatments.
