Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-23T11:07:39.005Z Has data issue: false hasContentIssue false
  • English
  • Français

Cotton crop environment, growth and yield in the Sudan Gezira: I. The Gezira observation plots: experimental design, cultural methods and yield analysis

Published online by Cambridge University Press:  27 March 2009

J. E. Jackson
J. E. Jackson
Affiliation:
Gezira Research Station, Wad Medani, Sudan
Get access Rights & Permissions [Opens in a new window]

Summary

Analysis of 21 years' cotton yield data from factorial experiments at three sites in the Sudan Gezira established that yields were significantly increased by nitrogenous fertilizer, that close spacing outyielded wide spacing and that variety X1730A (L type) outyielded variety MSDS (a Sakel type). The effect of nitrogen varied depending on variety and spacing and there were also marked variations from year to year in the effects of nitrogen, spacing, variety and some of the interactions. Year-to-year variations in the overall level of yield were very pronounced and accounted for more than half of the total variance at each site. Causes of year to year variation and the mechanism of the treatmenteffects will be discussed in subsequent papers.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 72 , Issue 2 , April 1969 , pp. 159 - 168
Copyright
Copyright © Cambridge University Press 1969

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

REFERENCES

Crowther, F. (1944). Studies in growth analysis of the cotton plant under irrigation in the Sudan. III. A comparison of plant development in the Sudan Gezira and in Egypt. Ann. Bot. N.S. 8, 213–57.CrossRefGoogle Scholar
Crowther, F. (1948). Organization of agricultural research and the experimental farms. In Agriculture in the Sudan, Tothill, J. D., ed., chap. 20. Oxford University Press.Google Scholar
Gregory, F. G., Crowther, F. & Lambert, A. R. (1932). The interrelation of factors controlling the production of cotton under irrigation in the Sudan. J. agric. Sci., Camb. 22, 617–38.CrossRefGoogle Scholar
Joyce, R. J. V. (1959). Recent progress in entomological research in the Sudan Gezira. Emp. Cott. Grow. Rev. 36, 179–86.Google Scholar
Joyce, R. J. V. (1959–1960). The yield response of cotton in the Sudan Gezira to DDT spray. Bull. ent. Res. 50, 567–94.CrossRefGoogle Scholar
Lambert, A. R. (1938). New Sakel strains in the Anglo-Egyptian Sudan. Emp. Cott. Grow. Rev. 15, 14–20.Google Scholar
Rose, M. F., Low, A., Faulkner, R. C. & Innes, N. L. (1960). The Gezira Research Station. Prog. Rep. Exp.Stn. Emp. Cott. Grow. Corp. 1958–9.Google Scholar