Assessing P fertilizer requirements of soils with phosphorus sorption isotherms
Silva, J.A.; Fox, R.L.
Proceedings Planning and Organization Meeting, Fertilizer INPUTS Increasing Productivity under Tight Supplies Project: 100-105
Laboratory studies showed that sorption of phosphate from solution by 4 soils from North Carolina was related to soil mineralogy and rainfall as well as to previous P fertilization. Coatings of amorphous material appeared to control initial phosphate sorption in highly weathered soils. Data from a long-term trial in Hawaii revealed a steadily declining P sorption capacity with repeated P fertilizer application.