In this study, we hypothesize that biotic/abiotic stresses to soil microbial community will be alleviated and thus microbial growth and activity improved in the salt stressed soil treated with soil amendment with biochar composted with poultry manure and supplemented with PS field experiments for years. This is now tested by characterizing the changes with the treatment in microbial biomass carbon and nitrogen by chemical assay, in gene abundance and in community structure by molecular biology assay and in enzyme activities by biochemical assay in this study. We aim to address improving soil biological quality and functioning and the recovery of salt-stressed soils for better crop productivity with biochar products.