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YAM BEAN (Pachyrhizus spp.) VARIETY TRIALS IN TONGA, SOUTH PACIFIC: FRESH TUBER YIELDS, DRY MATTER AND NITROGEN CONTENTS

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  • Grum, M.
  • Stolen, O.
  • Sorensen, M.

Abstract

A total of 16 accessions of Yam Bean (14 Pachvrhizus erosus. 1 £. ahipa and 1 P. tuberosus) were tested in a yield trial in Tonga. In addition 29 other accessions representing four different species of-Yam Bean (24 P. erosus. 2 P. ahipa. 2 P. tuberosus and 1 P. panamensis) were observed in multiplication plots. In the yield trials fresh weight tuber yields were up to 72 tons/ha. Dry matter percentages ranged from 8.0 to 20.8 with dry matter yields ranging from 1,13 0 Kg/ha to 7,4 60 Kg/ha. Nitrogen contents of raw peeled tubers were between 0.82 to 1.57% giving crude protein yields of 71-540 Kg/ha, or about twice as much as sweet potatoes (Ipomoea spp.) when grown under similar conditions in Tonga.

Suggested Citation

  • Grum, M. & Stolen, O. & Sorensen, M., 1990. "YAM BEAN (Pachyrhizus spp.) VARIETY TRIALS IN TONGA, SOUTH PACIFIC: FRESH TUBER YIELDS, DRY MATTER AND NITROGEN CONTENTS," 26th Annual Meeting, July 29 to August 4, 1990, Mayaguez, Puerto Rico 259365, Caribbean Food Crops Society.
    • Handle: RePEc:ags:cfcs90:259365
    DOI: 10.22004/ag.econ.259365
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    References listed on IDEAS

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    1. Vaillant, Victor & Robin, Christophe & Zinsou, Claude, 1989. "Comparison Of The Effects Of Allopurinol And Nitrate On Photosynthate Partitioning In Yam Bean," 25th Annual Meeting, July 1-6, 1989, Gosier, Guadeloupe 259984, Caribbean Food Crops Society.
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