Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-27T10:20:13.711Z Has data issue: false hasContentIssue false
  • English
  • Français

Experiments comparing concentrated and dilute NPK fertilizers and four nitrogen fertilizers on a range of crops

Published online by Cambridge University Press:  27 March 2009

F. V. Widdowson ,
A. Penny  and
R. J. B. Williams
F. V. Widdowson
Affiliation:
Rothamsted Experimental Station
A. Penny
Affiliation:
Rothamsted Experimental Station
R. J. B. Williams
Affiliation:
Rothamsted Experimental Station
Get access Rights & Permissions [Opens in a new window]

Extract

1. In 1959 a concentrated granular fertilizer (15% N, 10% P2O5, 20% K2O) was compared with an equivalent mixture of ammonium sulphate, superphosphate and muriate of potash (each supplying 0·75 or 1·50 cwt. N/acre) for potatoes. At Rothamsted (on heavy soil) the two fertilizers gave similar yields, but at Woburn (on light soil) the larger dressing of the concentrated fertilizer gave about 1 ton/acre more potatoes. In similar barley experiments a concentrated granular fertilizer (20% N, 10% P2O5, 10% K2O) was compared with a dilute granular fertilizer (12% N, 6% P2O5, 6% K2O); each was combine-drilled to supply 0·3 or 0·6 cwt. N/acre. At Rothamsted the two fertilizers gave identical yields, but at Woburn the concentrated fertilizer (at the double rate) gave significantly more grain.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 65 , Issue 1 , August 1965 , pp. 45 - 55
Copyright
Copyright © Cambridge University Press 1965

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Chalmers, G. R. & Kemp, D. C. (1962). J. Agric. Eng. Res. 7, no. 1, 64.Google Scholar
Cooke, G. W. (1964). Proc. Fertil. Soc. no. 80.Google Scholar
Cooke, G. W. (1964). J. Roy. Agric. Soc. 125, 142.Google Scholar
Devine, J. R. & Holmes, M. R. J. (1963a). J. Agric. Sci. 61, 381.CrossRefGoogle Scholar
Devine, J. R. & Holmes, M. R. J. (1963b). J. Agric. Sci. 61, 391.CrossRefGoogle Scholar
Frederick, L. R., Brown, J. R. & Bartholomew, W. V. (1963). Crops and Soils, 11–12, no. 21.Google Scholar
Gasser, J. K. R. (1959). J. Sci. Fd Agric. 10, 192.CrossRefGoogle Scholar
Shell Chemical Co. (1964). Fertilizers, the Facts and Figures on High Concentration.Google Scholar
Widdowson, F. V., Penny, A. & Williams, R. J. B. (1964). J. Agric. Sci. 62, 73.CrossRefGoogle Scholar