Phosphorus, potassium and sulphur cycles in agricultural soils /
Johnston, A. E.
Poulton, P. R.
Syers, John K.(John Keith)
International Fertiliser Society.
York, U.K. : International Fertiliser Society,
[2001]
"Paper presented to the International Fertiliser Society at a Symposium in Lisbon, on 4th March 2001."
Includes bibliographical references (p. 40-44).
Phosphorus in agriculture.
Potassium in agriculture.
Sulphur in agriculture.