This study aimed to analyze and quantify the effect of different ratios vermicompost, phosphate rock, sulfur on P solubilization release by Pseudomonas fluorescens Ur21, identify optimal levels those variables for an efficient biofertilizer. Twenty experiments were defined surface response methodology based a central composite design (CCD), effects various quantities (encoded −1, 0, or +1) was ...

phosphorus (p) is one a nutrient elements for plant growth. in most soils has complex behavior and forms sparingly soluble compounds with soil particles. phosphorus bioavailability can be controlled by soil biological activities for optimum nutrition of plants. this study was carried out in order to isolation of p-solubilizing bacteria (psb) as well as p-solubilizing fungi (psf) and their scree...