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FACTORS INFLUENCING THE RELEASE OF COPPER AND ZINC ADDITIVES FROM GRANULATED SUPERPHOSPHATE
Author(s) -
GILKES R. J.
Publication year - 1977
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1977.tb02299.x
Subject(s) - copper , zinc , chemistry , phosphate , leaching (pedology) , inorganic chemistry , zinc phosphate , nuclear chemistry , soil water , organic chemistry , geology , soil science
Summary When copper sulphate and zinc oxide are granulated with ordinary superphosphate, insoluble copper phosphate and soluble zinc phosphate are formed. The copper phosphate has the approximate chemical composition NaCu 6 H 3 (PO 4 ) 5 Cl. 6H 2 O and a structure similar to that of the mineral sampleite. When such fertilisers are applied to soils the development of an acid phosphate solution within granules dissolves most zinc and some copper. Subsequently, diffusion and leaching release zinc and copper from within the granules.