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Fig. 4. Leaf CP and IVOMD for different canopy heights (20, 40, and 60 cm) and layers (top 5-cm layer, T-5 cm; upper layer, UL; lower layer, LL) of limpograss across years. Means are not different if followed by the same letter (P > 0.1). Orthogonal polynomial contrasts are indicated for the effect of canopy height; L = linear, Q = quadratic, {dagger} P <= 0.1, * P <= 0.05, ** P <= 0.01.