3 books • 3 series
Changes in Understanding the Behaviour of Soil and Fertiliser Phosphorus (Proceedings of the International Fertiliser Society, #589)
Phosphorus, Potassium and Sulphur Cycles in Agricultural Soils (Proceedings of the International Fertiliser Society, #465)
Soil and Plant Potassium in Agriculture (Proceedings of the Fertiliser Society, No. 411.)