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Phosphorus losses through transfer, soil erosion and runoff : processes and implications

Ward, Jonet C.; Talbot, J. M.; Denne, T.; Abrahamson, Michael (Lincoln College and University of Canterbury. Centre for Resource Management., 1985-12)

Phosphate rock is a strategic material upon which pastoral agriculture and all New Zealanders depend. Phosphate fertilizer has no close substitute, and is, therefore an important limiting factor to agricultural productivity. ...