Effect of sett size on yield of individual plants of Dioscorea rotundata Poir.

Abstract

Larger setts gave higher tuber yields than smaller setts in Dioscorea rotundata Poir. (cv. 'alafu'). The main effect of the larger sett was to produce a vigorous initial growth of organs, an advantage that was maintained throughout the growing season, leading to higher final tuber yield. The growth characteristics (relative growth rate, net assimilation rate, leaf area ratio) were not affected by sett size.