North-West India Soils Show Increased Phosphate Sorption, Impacting Agricultural Productivity
Phosphate sorption was studied in arid, semi-arid, and dry sub-humid soils in north-west India. The amount of phosphate absorbed increased as the solution's phosphate concentration increased. The sorption process was well described by the Langmuir and Freundlich equations. High energy sites absorbed less phosphate compared to low energy sites. Organic carbon, clay, CaCO3, and extractable Al and Fe influenced phosphate sorption. Organic carbon and CEC had negative correlations with bonding energy constants. The study found that specific soil properties, like clay or CaCO3, had a significant impact on phosphate sorption.