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

M. Grum, O. Stolen and M. Sorensen

No 259365, 26th Annual Meeting, July 29 to August 4, 1990, Mayaguez, Puerto Rico from Caribbean Food Crops Society

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.

Keywords: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies (search for similar items in EconPapers)
Pages: 13
Date: 1990-07-29
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Persistent link: https://EconPapers.repec.org/RePEc:ags:cfcs90:259365

DOI: 10.22004/ag.econ.259365

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