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Yield Performance of Yam Bean in Tonga, South Pacific

Published online by Cambridge University Press:  03 October 2008

M. Grum ,
M. Halafihi ,
O. Stölen  and
M. Sørensen
M. Grum
Affiliation:
Department of Agricultural Science, Thorvaldsensvej 40, DK 1871 Frederiksberg C, The Royal Veterinary and Agricultural University, Denmark
M. Halafihi
Affiliation:
Research Division, Ministry of Agriculture and Foresty, PO Box 14, Nuku'alofa, Tonga, South Pacific, Denmark
O. Stölen
Affiliation:
Department of Agricultural Science, Thorvaldsensvej 40, DK 1871 Frederiksberg C, The Royal Veterinary and Agricultural University, Denmark
M. Sørensen
Affiliation:
Department of Botany, Dendrology and Forest Genetics, Rolighedsvej 23, DK 1958 Frederiksberg C, The Royal Veterinary and Agricultural University, Denmark
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Summary

Twenty one accessions of yam bean (Pachyrhizus Rich. ex DC.) were tested in yield trials under short day conditions in Tonga, South Pacific. Fresh weight tuber yields ranged from 5.3 to 72.0 t ha−1, dry matter content from 8.0 to 20.8% and dry matter yields from 1.20 to 8.57 t ha−1. Crude protein content of peeled tubers varied between 5.1 and 9.8% of dry matter, yielding 71–540 kg ha−1 of crude protein. Varietal variation in leaf defoliation by the rose beetle, Adoretus versutus Har., was noted.

Type
Research Article
Information
Experimental Agriculture , Volume 30 , Issue 1 , January 1994 , pp. 67 - 75
Copyright
Copyright © Cambridge University Press 1994

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