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The effect of amount and timing of nitrogen application to drilled crisp lettuce crops on head weight at maturity

Published online by Cambridge University Press:  27 March 2009

D. C. E. Wurr  and
Jane R. Fellows
D. C. E. Wurr
Affiliation:
National Vegetable Research Station, Wellesbourne, Warwick, CF35 9EF
Jane R. Fellows
Affiliation:
National Vegetable Research Station, Wellesbourne, Warwick, CF35 9EF
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Extract

Much of the recent increase in crisp lettuce production in the U.K. has been marketed as heavily trimmed solid ‘Iceberg’ heads, wrapped in plastic film. Supermarkets want ‘Iceberg’ lettuce with a minimum trimmed weight of 450 g (Anon. 1983) and consistency of product, but the mean head weight of crisp lettuce at maturity can vary considerably from one sowing to another as a result of environmental conditions earlier in growth (Pew, Gardner & Bessey, 1984; Wurr & Fellows, 1984). In midsummer, some sowings of the most popular variety Saladin can produce larger and heavier heads thanc supermarkets require and the cause of this variation needs to be understood in order to increase the proportion of crops meeting supermarket needs.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 105 , Issue 3 , December 1985 , pp. 727 - 729
Copyright
Copyright © Cambridge University Press 1985

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References

REFERENCES

Anon, . (1983). Can we grow really good Iceberg in the UK? Grower 100, No. 9, 17–18.Google Scholar
Cleaver, T. J., Salter, P. J. & Darby, R. J. (1977). Influence of nitrogen supply on bolting of overwintered onions. Report of the National Vegetable Research Station for 1976, pp. 40–41.Google Scholar
Frota, J. N. E. & Tucker, T. C. (1972). Temperature influence on ammonium and nitrate absorption by lettuce. Proceedings, Soil Science Society of America 36, 97–100.CrossRefGoogle Scholar
Gardner, B. R. & Pew, W. D. (1974). Response of spring grown head lettuce to nitrogen fertilizer. Agricultural Experiment Station, The University of Arizona Technical Bulletin 210, 9 pp.Google Scholar
Ministry Of Agriculture, Fisheries and Food (1984). Outdoor lettuce. Ministry of Agriculture, Fisheries and Food Booklet 2446, 54 pp.Google Scholar
Pew, W. D., Gardner, B. R. & Bessey, P. M. (1984). A comparison of controlled-release and certain soluble N fertilizers on yield and maturity in spring-grown head lettuce. Journal of the American Society for Horticultural Science 109, 531–535.CrossRefGoogle Scholar
Stanford, G., Frere, M. H. & Schwaninger, D. H. (1973). Temperature coefficient of soil nitrogen mineralization. Soil Science 115, 321–323.CrossRefGoogle Scholar
Whitfield, W. A. D. (1974). The soils of the National Vegetable Research Station, Wellesbourne. Report of the National Vegetable Research Station for 1973, pp. 21–30.Google Scholar
Wurr, D. C. E. & Fellows, J. R. (1984). The growth of three crisp lettuce varieties from different sowing dates. Journal of Agricultural Science, Cambridge 102, 733–745.CrossRefGoogle Scholar