Phosphate-solubilizing bacteria were studied in red clover roots to find strains that can help plants grow better. 21 strains were found, with some able to dissolve inorganic phosphate and others organic phosphate. Some strains were better at dissolving phosphate than others. The bacteria's ability to dissolve phosphate was related to pH and organic acids in the soil. Some strains showed promise for use in fertilizers to help plants grow.