Nutrient Requirements of Tomatoes (Lycopersicon esculentum) in S. W. Nigeria. II. Foliar Analysis for Assessing N, P and K Requirements
- 1 January 1975
- journal article
- research article
- Published by Cambridge University Press (CUP) in Experimental Agriculture
- Vol. 11 (2) , 137-143
- https://doi.org/10.1017/s001447970000658x
Abstract
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.Keywords
This publication has 3 references indexed in Scilit:
- Studies on White Yam (Dioscorea rotundata) III. Foliar Analysis for Nitrogen NutritionExperimental Agriculture, 1972
- Investigation of Nitrogen Fertilization of Cotton by Tissue AnalysisExperimental Agriculture, 1968
- The Magnesium Content and Potassium Magnesium Ratio of Tomato Leaves in Relation to Degree of ChlorosisThe Journal of Horticultural Science and Biotechnology, 1965