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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
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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

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References

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