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



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



J Agr Sci 69(3): 305-315



Growth analysis of cotton crops sown in the Sudan Gezira at monthly intervals between Aug. 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 Aug., Sept. and early Oct. 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. 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 Aug.

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Related references

Studies on the sowing dates of cotton in the Sudan Gezira. 1. The influence of date of sowing on plant growth and development. J. agric. Sci., Camb, 69: 3, 305-15. Bibl. 18, 1967

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