The researchers studied how different soil properties affect the release of phosphorus in acidic soils. They looked at seven soils with varying textures, organic carbon, and aluminum and iron content. They found that the clay to organic carbon ratio influenced the amount of phosphorus released. The rate of phosphorus release was described by two equations, with certain constants related to soil properties like aluminum, organic carbon, and pH. These constants changed based on the ratios of clay, aluminum, and iron to organic carbon in the soil. The researchers concluded that these ratios can help predict phosphorus release in soils with similar characteristics, but not in soils with different compositions.