Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-03T05:29:55.884Z Has data issue: false hasContentIssue false
  • English
  • Français

Oil content of cotton seed in Northern Nigeria: 2. varietal and environmental variation

Published online by Cambridge University Press:  27 March 2009

H. E. Gridley  and
J. B. Smithson
H. E. Gridley
Affiliation:
Institute for Agricultural Research, Samaru, Zaria, Nigeria
J. B. Smithson
Affiliation:
Institute for Agricultural Research, Samaru, Zaria, Nigeria
Get access Rights & Permissions [Opens in a new window]

Summary

Differences between sites accounted for a large proportion of the variation in the oil percentage of cotton seed from variety and agronomic trials conducted in Northern Nigeria but were not consistent between seasons. Reduced oil percentages from the drier areas of the north and from later sowings suggested that length of season is an important factor but insect attack and differences in the amounts of nitrogen, potash and boron applied to the soil also contributed to the variation. Application of insecticide, potash and boron increased and nitrogen decreased oil percentages. The latter effect usually resulted from an increase in seed size without a corresponding increase in oil content. The variation in the oil percentages of commercial varieties derived from the same Nigerian Allen stock and the relatively small interactions between varieties and environments suggested that this character might be improved by selection.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 88 , Issue 3 , June 1977 , pp. 731 - 736
Copyright
Copyright © Cambridge University Press 1977

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ali, M. (1966). Oil content of cotton seed: variation within varieties and programme for improvement. Cotton Growing Review 43, 218–29.Google Scholar
Church, J. M. F. (1971). Cotton seed (Cotton Research Corporation summer meeting). Cotton Growing Review 48, 249–54.Google Scholar
Faulkner, B. C. & Smithson, J. B. (1973). Cotton breeding. Cotton Research Report, Northern States, Nigeria, 1971–72, 10–42. London: Cotton Research Corporation.Google Scholar
Faulkner, R. C., Smithson, J. B., Gridley, H. B. & Mustafa, S., (1975). Cotton breeding. Cotton Research Report, Northern States, Nigeria, 1973–74, 11–38. London: Cotton Research Corporation.Google Scholar
Faulkner, R. C., Smithson, J. B. & Mustafa, S. (1974). Cotton breeding. Cotton Research Report, Northern States, Nigeria, 1972–73, 11–43. London: Cotton Research Corporation.Google Scholar
Harter, H. L. (1960). Critical values for Duncan's new multiple-range test. Biometrics 16, 671–85.CrossRefGoogle Scholar
Mather, K. (1964). Statistical Analysis in Biology. London: Methuen.Google Scholar
Smithson, J. B. & Gridley, H. E. (1977). Oil content of cotton seed in Northern Nigeria. 1. Assessment of nuclear magnetic resonance for determination of the oil percentage of cotton seed. Journal of Agricultural Science, Cambridge 88, 727–9.CrossRefGoogle Scholar