Fig. 2. Total, leaf, and stem bulk density (BD) for different canopy heights and layers (top 5-cm layer, T-5 cm; upper layer, UL; lower layer, LL) of limpograss during 1998 and 1999. In each treatment UL = the upper 25% and LL = the lower 50% of the sward. Orthogonal polynomial contrasts are indicated for the effect of canopy height; L = linear, Q = quadratic, NS = not significant, P 0.1, * P 0.05.