The effect of sod-cutting to different depths on Calluna heathland regeneration

Replicate plots were cut to the A1, A2 and B2H horizons, and followed through 7 yr of regrowth. Maturation followed a similar course in all plots, and the plots responded similarly to exogenous disturbances. Differences between treatments in terms of Calluna cover and community composition were slight, inconsistent between years, and ultimately negligible. The B2H plots (and to a lesser extent the A2 plots) showed higher Calluna establishment rates than the A1 plots, but the plants remained smaller than those on the A1 plots. Biomass distribution data ruled out obvious explanations for this slower growth rate in terms of nutrient competition or drought stress. There is no practical advantage to sod-cutting more deeply than the A1 horizon.-from Authors