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Experiments evaluating aqueous ammonia, aqueous urea and a solution of ammonium nitrate and urea as nitrogenous fertilizers for winter wheat

Published online by Cambridge University Press:  27 March 2009

F. V. Widdowson  and
A. Penny
F. V. Widdowson
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, A L5 2JQ
A. Penny
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, A L5 2JQ
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Summary

Six experiments on winter wheat, three in 1974 and three in 1975, evaluated aqueous ammonia, aqueous urea and a solution of ammonium nitrate and urea, using ammonium nitrate granules as the standard. Aqueous ammonia and aqueous urea were injected 8–10 cm deep in bands either 25 or 50 cm apart during April. The ammonium nitrate/urea solution was sprayed and the ammonium nitrate granules were broadcast (a) partly in April and partly in May or (6) wholly in May. All were applied at 50, 75, 100 or 125 kg N/ha. Yields and % N in grain were measured and N removed by grain calculated. In two experiments lodging diminished yield and complicated the comparisons.

Elsewhere, aqueous urea and aqueous ammonia were of similar value, and each gave a larger yield when injected in bands 25 rather than 50 cm apart. Both fertilizers gave yields similar to those from broadcasting the ammonium nitrate granules, but larger yields than from spraying the ammonium nitrate/urea solution. Yields were slightly larger when divided rather than single topdressings were given, but % N in grain and the amounts of N removed were smaller. Yields and % N in the grain were smallest when the ammonium nitrate/urea solution was sprayed. The other three fertilizers were each of greater value judged by N uptake, the ammonium nitrate granules having a slight advantage.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 89 , Issue 2 , October 1977 , pp. 415 - 424
Copyright
Copyright © Cambridge University Press 1977

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References

Ashworth, J. & Flint, R. C. (1974). Delayed nitrification and controlled recovery of aqueous ammonia injected under grass. Journal of Agricultural Science, Cambridge 83, 327–33.CrossRefGoogle Scholar
Church, B. M. (1975). Fertilizer Use in Farm Type Regions of England and Wales, 1974. London: M.A.F.F. (SS/SAF/17).Google Scholar
Church, B. M. (1976). Use of fertilizers in England and Wales, 1975. Rothamsted Experimental Station Report for 1975, part 2, 91–5.Google Scholar
Huack, R. D. & Russell, D. A. (1969). Fluid fertilizers for direct application in the United States. Outlook on Agriculture 6 (1), 3–14.CrossRefGoogle Scholar
Hills, M. G. (1974). Fertilizer Types, 1973: Increases in the Use of ‘Straight’ N. London: M.A.F.F. (SS/SAF/11).Google Scholar
Penny, A. & Freeman, S. C. R. (1974). Results from experiments with winter wheat, spring barley and grass, comparing a liquid N-fertilizer either alone or with added herbicide, and topdressings of ‘Nitro Chalk’ without or with herbicide sprayed alone. Journal of Agricultural Science, Cambridge 83, 511–29.CrossRefGoogle Scholar
Penny, A., Widdowson, F. V. & Ashworth, J. (1977). Results from an experiment on permanent grass evaluating aqueous ammonia and aqueous urea injected in bands either 30 or 60 cm apart. Journal of Agricultural Science, Cambridge 88, 319–31.CrossRefGoogle Scholar
Widdowson, F. V., Penny, A. & Flint, R. C. (1972). Results from barley experiments comparing aqueous ammonia and aqueous urea with ammonium nitrate, and also liquid with granular NPK fertilizers. Journal of Agricultural Science, Cambridge 79, 349–61.CrossRefGoogle Scholar
Williams, R. J. B. (1969). The rapid determination of nitrate in crops, soils, drainage and rainwater, by a simple field method using diphenylamine or diphenylbenzidine with glass fibre paper. Chemistry and Industry, 1735–6.Google Scholar
Yields of The Field Experiments, 1976 (1977). Rothamsted Experimental Station, Harpendon, p. 256–9.Google Scholar