Fig. 4. Vegetative (stems and non senescent leaves) tissue (solid lines) and pod tissue (dashed lines) dry weights taken during the (a) 1996 and (b) 1997 growing seasons. Each point is the average of either two old (
) or two new (
) soybean cultivars (Table 1). The symbols ** and *** indicate significant differences (P = 0.01 and 0.001, respectively) in vegetative tissue dry weights between the old and the new cultivars for the sampling date. The symbols 
,, and indicates significant differences (P = 0.05, 0.01, and 0.001, respectively) in pod tissue dry weights between the old and the new cultivars for the sampling date
