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Influence of banded fertiliser on the chemical environment surrounding the band. II. Effect on soil‐solution cations, cation—anion balance and solution phosphorus
Author(s) -
Isensee A. R.,
Walsh L. M.
Publication year - 1972
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740230412
Subject(s) - chemistry , monocalcium phosphate , urea , ammonium , phosphorus , phosphate , aqueous solution , nitrate , inorganic chemistry , nutrient , zoology , nuclear chemistry , biochemistry , organic chemistry , fishery , fish <actinopterygii> , fish meal , biology
The influence of several banded fertilisers on soil solution content of Ca, Mg, K, P and on cation‐anion balance at two distances from the band was studied. Treatments consisted of various combinations of monocalcium phosphate (MCP), KCl, NH 4 NO 3 , (NH 4 ) 2 HPO 4 and urea applied on a nutrient element basis of 22.4 or 67.2 kg/ha. Ammonium nitrate or KCl, supplied separately, produced the highest solution concentrations of Ca (up to 1200 parts/million) and Mg (up to 500 parts/million). Solution concentration of Ca and Mg increased over a 32‐day incubation time near treatments containing urea. Treatments containing (NH 4 ) 2 HPO 4 initially reduced solution Ca and Mg contents only when applied at 67.2 kg/ha. All treatments not containing K had similar but smaller effects on solution K than they did on Ca and Mg. Highly significant correlations were obtained between total mequiv. of Ca+ Mg and NO 3 for treatments containing urea or (NH 4 ) 2 HPO 4 , while low or non‐significant correlations resulted from NH 4 NO 3 treatments. Treatments containing (NH 4 ) 2 HPO 4 and MCP yielded soil solution P concentrations as high as 1000 parts/million. Urea combined with (NH 4 ) 2 HPO 4 or MCP drastically reduced solution P concentrations.