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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
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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

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References

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