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- Miller, Anthony P.; Arai, Yuji
- Biology and fertility of soils 2017 v.53 no.7 pp. 737-742
- acid hydrolysis; agricultural soils; hydroxides; phosphorus; phytic acid; prediction; solubility; tripolyphosphates; United States
- ... Soil test phosphorus (STP) (Bray P-1, Mehlich III) was developed to predict the plant available P in agricultural soils in the USA. The acidic STP extracting solutions were intended to extract phosphate from alkaline earth metal-based solubility products and or adsorbed species on amorphous metal hydroxides or phyllosilicates in soils. However, the accuracy of STP in predicting plant available pho ...