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Field experiments on the fertilizer requirements of maincrop potatoes

Published online by Cambridge University Press:  27 March 2009

J. A. Birch ,
J. R. Devine ,
M. R. J. Holmes  and
J. D. Whitear
J. A. Birch
Affiliation:
Levington Research Station, Ipswich
J. R. Devine
Affiliation:
Levington Research Station, Ipswich
M. R. J. Holmes
Affiliation:
Levington Research Station, Ipswich
J. D. Whitear
Affiliation:
Levington Research Station, Ipswich
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Extract

1. Fifty-one experiments on the nitrogen, phosphate and potash requirements of maincrop potatoes were carried out in Great Britain in 1956–62. Each experiment tested four rates of each nutrient in all combinations and both total and riddled yields and quality data were obtained.

2. Nitrogen requirement was influenced by previous cropping and the rainfall during the preceding winter. 50–80 lb/acre of N are recommended in mixed farming rotations depending on winter rainfall, and 120–150 lb/acre of N in arable rotations.

3. Yield increases from phosphate were usually larger on soils with low citric-soluble phosphate. Nevertheless, irrespective of soil phosphate status, optimum rates of application were at least 120 lb/acre of P2O5 which was the highest rate tested in most of the experiments.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 1 , August 1967 , pp. 13 - 24
Copyright
Copyright © Cambridge University Press 1967

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