Abstract
THE concentration of plant food in mixed fertilizers can be increased by the replacement of ammonium sulphate, wholly or in part, by ammonium nitrate. Granular mixtures made, inter alia, from ammonium nitrate and superphosphate (a mixture of monocalcium phosphate and calcium sulphate) have been found to undergo spontaneous heating when stored in large heaps, rises in temperature of 20–30 deg. C. being recorded over periods of weeks.
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References
Jacob, K. D., Tech. Bull. 364 (U.S. Dept. of Agriculture).
British Patent No. 12745/1912.
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Seel, F., Angew. Chemie, 68, 272 (1956).
Dawson, J. B. (unpublished work in these laboratories).
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BARCLAY, K., CREWE, J. & THATCHER, K. Control of Self-heating and Gas Emission in Nitrate-containing Fertilizers. Nature 190, 1189–1190 (1961). https://doi.org/10.1038/1901189a0
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DOI: https://doi.org/10.1038/1901189a0
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