Pod number per plant was the most responsible component for yield change under UV-B radiation in the 2-year study. This suggests that UV-B radiation imposed during early flowering stage would change assimilates availability to the developing reproductive structures, influence flowering, and flower and pod abscission number with a resultant change in final pod number at harvest. Pod number per plant as the yield component was previously shown tobe the most influenced by change in cultural and environmental conditions (Herbert and Litchfield, 1982; Board et al., 1992).