Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-24T20:24:29.405Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on the sowing dates of cotton in the Sudan Gezira: I. The influence of date of sowing on plant growth and development

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]

Extract

Growth analysis of cotton crops sown in the Sudan Gezira at monthly intervals between August and May revealed a marked seasonal pattern of growth. Irrespective of plant age and fruiting state growth of non-senescent plants was slowest during the cool winter months. Relative growth rates of young plants were highest in August, September and early October due to the high specific leaf areas and fairly high net assimilation rates found then. They were lowest when minimum temperatures were lowest. Net assimilation rates were also lowest in the coolest months, probably as a result of restricted growth. High temperatures in the spring reduced fruiting. It is concluded that low minimum temperatures and high evaporation rates are both associated with slow growth, and play a large part in determining the characteristic decline of growth rates of cotton sown at the usual date in August.

I wish to thank the Chief of the Research Division, Ministry of Agriculture, Sudan, for permission to publish this paper and to record my gratitude to the team of field and laboratory assistants, especially Salih Saad and Hassan Osman, who helped in the work.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 3 , December 1967 , pp. 305 - 315
Copyright
Copyright © Cambridge University Press 1967

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

Allan, W. N. (1948). Irrigation in the Sudan. In Agriculture in the Sudan (ed. Tothill, J. D.), chap. 21, pp. 593–632. Oxford University Press.Google Scholar
Andrews, F. W. (1936). Investigations on black-arm disease of cotton under field conditions. I. The relation of the incidence and spread of black-arm disease of cotton to cultural conditions and rainfall in the Anglo-Egyptian Sudan. Emp. J. exp. Agric. 344–56.Google Scholar
Balls, W. L. (1912). The Cotton Plant in Egypt. London: Macmillan.Google Scholar
Balls, W. L. (1953). The Yields of of a Crop. London: Spon.Google Scholar
Crowther, F. (1933–1934). Plant physiology section. Ann. Rep. Oezira Res. Sta; Sudan.Google Scholar
Crowther, F. (1934). Studies in growth analysis of the cotton plant under irrigation in the Sudan. I. The effects of different combinations of nitrogen applications and water-supply. Ann. Bot. 48, 877–913.CrossRefGoogle Scholar
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). A review of experimental work. In Agricultural in the Sudan (ed. Tothill, J. D.), chap. 20, p. 460. Oxford University Press.Google Scholar
Jackson, J. E. & Faulkner, R. C. (1961). Investigations of factors affecting grade and crop development. Prog. Rep. Exp. Stns. Sudan, Emp. Cott. Grow. Corp. 1960–61, pp. 13–20.Google Scholar
Jackson, J. E. & Faulkner, R. C. (1962). Studies in the quality of Gezira cottons. I. The relationship between quality and crop earliness. Emp. J. exp. Agric. 30, 192–206.Google Scholar
Knight, R. L. (1954). Cotton breeding in the Sudan. Part 2. Egyptian cotton. Emp. J. exp. Agric. 22, 81–92.Google Scholar
Low, A. (1960). Misc. paper 81c. Agric. Res. Div, Min. of Agric. Sudan.Google Scholar
Mackinnon, E. (1948). Blue Nile Province. In Agriculture in the Sudan (ed. Tothill, J. D.), chap. 27, pp. 762–809. Oxford University Press.Google Scholar
Mauney, J. R. (1966). Floral initiation of upland cotton Gossypium hirsutum L. in response to temperatures. J. exp. Bot. 17, 452–60.CrossRefGoogle Scholar
O'kelley, J. C. & Cabb, P. W. (1953). Elongation of the cotton fibre. In Growth and Differentiation in Plants (ed. Loomis, W. E.), chap. 4, pp. 55–69. Iowa Stato College Press.Google Scholar
Portsmouth, G. B. (1937). Variations in the leaves of cotton plants grown under irrigation in the Sudan Gezira. Ann. Bot. N.S. 1, 277–91.CrossRefGoogle Scholar
Warren Wilson, J. (1966). An analysis of plant growth and its control in arctic environments. Ann. Bol. N.S. 30, pp. 383–402.Google Scholar
Watson, D. J. (1952). The physiological basis of variation in yield. Adv. in Agron. 4, 101—44.Google Scholar