Four local efficient biofertilizer strains namely, Gluconacetobacter G1 and Azospirillum ACD-15 as nitrogen fixers, Pseudomonas striata phosphorus solubilizing bacterium and a potassium were used in developing NPK consortia. Each consortia consisted of one the two fixing bacteria, phosphate (PSB) (KSB) bacteria five different formulations lignite, kaolinite...