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Implications of daylength sensitivity in bambara groundnut (Vigna subterranea) for production in Botswana

Published online by Cambridge University Press:  27 March 2009

D. Harris  and
S. N. Azam-Ali
D. Harris
Affiliation:
SADCC/ODA Land & Water Management Project, Private Bag 00108, Gaborone, Botswana
S. N. Azam-Ali
Affiliation:
Department of Agriculture and Horticulture, Faculty of Agricultural and Food Sciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
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Summary

Bambara groundnut (Vigna subterranea (L.) Verde.) is grown throughout southern and western Africa, primarily as a subsistence crop, but agronomic information is scarce. The rates of emergence, flowering and pod production were assessed for 20 weekly sowings between 16 October 1990 and 26 February 1991 at Sebele, Gaborone, Botswana. Daylength during this period changed from 12·7 h to 13·7 h and back to 12·6 h. Mean time to 50% emergence was 111 days while mean time to 50% flowering was 47·5 days. The thermal time to first pod production varied with daylength, decreasing as daylength decreased, to an approximately constant value when daylength after flowering was less than about 12 h. Consequently, the plant size at which pods were produced also varied. The practical implications for date of sowing and plant spacing are discussed.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 120 , Issue 1 , February 1993 , pp. 75 - 78
Copyright
Copyright © Cambridge University Press 1993

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References

REFERENCES

Jones, M. J. (1987). Soil water and crop production in Botswana. Soil Use and Management 3, 74–79.CrossRefGoogle Scholar
Lewitt, T. (1990). Transpiration and soil surface evaporation from bambara groundnut (Vigna subterranea (L.) Verde.) and groundnut (Arachis hypogaea (L.)) grown under different irrigation regimes. BSc thesis, University of Nottingham.Google Scholar
Linnemann, A. R. (1987). Bambara groundnut (Vigna subterranea (L.) Verde.))–a review. Abstracts on Tropical Agriculture 12 (7), 9–25.Google Scholar
Linnemann, A. R. (1991 a). Preliminary observations on photoperiod regulation of phenological development in bambara groundnut (Vigna subterranea). Field Crops Research 26, 295–304.CrossRefGoogle Scholar
Linnemann, A. R. (1991 b). Influence of photoperiod on development of bambara groundnut (Vigna subierranea (L.) Verde). Acta Botanka Neerlandica 40, 374.Google Scholar
Linnemann, A. R. & Azam-Ali, S. N. (1992). Bambara groundnut (Vigna subterranea (L.) Verde.). In Underutilised Crops Series. II. Vegetables and Pulses. London: Chapman and Hall.Google Scholar
L & WMP (1988). SADCC/ODA Land and Water Management Project. First Annual Report, Gaborone, BotswanaGoogle Scholar
Mayeux, A. (1990). Effect of plant density on groundnut yield in Botswana. ICRISAT (International Crops Research Institute for the Semi-Arid Tropics). In Proceedings of the Fourth Regional Groundnut Workshop for Southern Africa, 19–23 March 1990, Arusha, Tanzania, pp. 167–175. Patancheru.Google Scholar
National Academy of Sciences (1979). Bambara groundnut. In Tropical legumes: Resources for the Future, pp. 47–53. Washington, DC: National Academy of Sciences.Google Scholar
Nyamudeza, P. (1989). Crop water use and the root systems of bambara groundnut (Vigna subterranea (L.) Verde.) and groundnut (Archis hypogaea (L.)) in response to irrigation and drought. MSc thesis, University of Nottingham.Google Scholar