The effect of different seeding rates and nitrogen levels on leaf, stem, inflorescence, and root biomass (g plant−1) of Ischaemum rugosum.

Data were fitted to an exponential decay model: Y = y0+a×e−bx where Y is the leaf, stem, and inflorescence biomass (g plant−1) at different seed rates (kg ha−1) x; y0 is the minimum leaf, stem, and inflorescence biomass at seed rate 100 kg ha−1; y0+a is the maximum leaf, stem, and inflorescence biomass at seed rate 0 kg ha−1; and b is the slope. Parameter estimates are followed by standard error in parentheses.