Three hillslopes were selected in

On each slope, one transect was laid out across the full length of the slope section. Five equidistant points were established from the top to the bottom of each slope to take into account ash and GSK1324726A spatial heterogeneity (Fig. 1). At each of the five points of the sampling transect, a grid was laid out and a plot of 50 × 60 cm was sampled for soil and ash.