Fig. 6. Tillage effects on dry matter accumulation of first position bolls located on sympodia off Mainstem Nodes (MSN) 5 to 8 and 9 to 12 for cotton cv Stoneville 453 grown on a Gigger silt loam in 1991, 1992, and 1994. Tillage treatments had been in place since 1987. Error bars represent LSD 0.05 unless subtended by (LSD 0.10). Differences between points at a given time not having an error bar are NS.