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Chemical properties of upland peats influencing the retention of phosphate and potassium ions

, : Chemical properties of upland peats influencing the retention of phosphate and potassium ions. Journal of Soil Science 34(1): 75-82

Peat samples representing depths of 0-15 cm and 15-30 cm were obtained from 11 upland sites in southern Scotland [UK]. Their pH, ash content, cation exchange capacity, phosphate sorption index and contents of 0.1 M HCl-extractable Fe and Al were determined as indicators of the extent to which phosphate and K-ions would be retained following afforestation and application of fertilizers to these sites. In all soils, cation exchange capacities were considerably larger than the quantity of K normally applied as fertilizer. Phosphate sorption indices were closely related to the content of extractable Fe and Al in the peat samples. When expressed on a volume basis, the indices were low compared with those published for mineral soils, and some peats appeared to have almost no capacity to sorb phosphate ions from solution.

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Accession: 001053909

DOI: 10.1111/j.1365-2389.1983.tb00814.x

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