Phosphorus is crucial for plant growth, and phosphate-solubilizing bacteria help make it more available to plants. A study looked at different phosphorus sources on soybean growth and quality. They found that using single super phosphate or rock phosphate with phosphate-solubilizing bacteria increased seed and straw yield, nutrient uptake, and protein content in soybean seeds. Single super phosphate was more effective than rock phosphate, and increasing phosphorus application rate also improved yield and nutrient uptake.