Résumé
ABSTRACT: The dominant bacteriological and archaeal phyla of compounded soils sourced from a commercial farm estate located in Amukpe town and a nearby control in Adavware community both in Delta State, were evaluated with the aid of Next Generation Sequencing (NGS) protocols. The residual herbicide and pesticide composition of the bulked soils were also determined using gas chromatography (GC) and electron capture detector (ECD). Total concentrations of the extracted DNA were 6.83 and 6.65 ng/µl for the control and experimental soils. Nine (9) bacterial phyla; Proteobacteria, Actinobacteria, Chloroflexi, Firmicutes, Verrucomicrobia, Planctomycetes, Bacteroidetes Acidobacteria, and Elusimicrobia were observed in the control soil. Thirteen (13) bacterial phyla; Elusimicrobia, Fibrobacteres Lentisphaerae, Armatimonadetes, Cyanobacteria/Chloroplast, Bacteroidetes, Actinobacteria, Proteobacteria, Chloroflexi, Firmicutes, Acidobacteria, Planctomycetes and Verrucomicrobia were detected in the experimental soil. Two (2) archaeal phyla; Euryarchaeota, and Diapherotrites were detected both the experimental and control soil, whilst an additional archaeal phylum; Woesearchaeota was present in only the experimental soil. The total organochloride phosphate component of the experimental soil was 1.4µg/Kg and 0.4µg/Kg for the control soil respectively