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Assessment of results from wheat trials testing varieties and application of nitrogenous fertilizer

Published online by Cambridge University Press:  27 March 2009

J. R. Holbrook ,
W. R. Byrne  and
W. J. Ridgman
J. R. Holbrook
Affiliation:
Northey Farm, Bozeat, Nr Wellingborough, Northanta
W. R. Byrne
Affiliation:
Northey Farm, Bozeat, Nr Wellingborough, Northanta
W. J. Ridgman
Affiliation:
Department of Applied Biology, Pembroke Street, Cambridge
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Summary

The analysis of two experiments involving the response of bread-making wheat to application of nitrogenous fertilizer is discussed. It is shown that a step function is required to determine the amount of applied N which optimizes the profit to be obtained from the crop. Varieties varied in their yield response to N and in the amount of applied N at which the ‘step’ took place and it is argued that trials of varieties at a common rate of N application or the reporting of results which are averaged over a number of rates cannot lead to very precise recommendations for growers.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 101 , Issue 2 , October 1983 , pp. 447 - 452
Copyright
Copyright © Cambridge University Press 1983

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References

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