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Nutrient Requirements of Tomatoes (Lycopersicon esculentum) in S. W. Nigeria. II. Foliar Analysis for Assessing N, P and K Requirements

Published online by Cambridge University Press:  03 October 2008

R. A. Sobulo ,
A. A. Fayemi  and
A. Agboola
R. A. Sobulo
Affiliation:
Institute of Agricultural Research and Training, University of Ife, Ibadan, Nigeria
A. A. Fayemi
Affiliation:
University of Ibadan, Nigeria
A. Agboola
Affiliation:
University of Ibadan, Nigeria
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Summary

The fifth leaf of tomato plants sampled at the early flowering stage (seventh to eighth week after sowing) gave good assessments of N, P and K requirements of the tomato crop growing in the field but total N was less useful than nitrate-nitrogen for diagnosing nitrogen needs. The levels of critical N, P and K in the crop were 0·4 per cent NO3-N, 0·4 per cent P and 4 per cent K, with severe deficiencies when levels were less than 0·1, 0·15 and 2 per cent respectively.

Type
Research Article
Information
Experimental Agriculture , Volume 11 , Issue 2 , April 1975 , pp. 137 - 143
Copyright
Copyright © Cambridge University Press 1975

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References

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