Fig. 5 | Scientific Reports

Fig. 5

From: Prescribed burning has negligible effects on the plant-soil system in Pinus sylvestris L. forests of the European Alps

Fig. 5

Organic horizon (a) thickness (cm), (b) composition depicted on van Krevelen diagrams (H/C vs. O/C molar ratios), (c) moisture (%) and (d) water repellency (expressed by the Water Drop Penetration Time test, s). Time of sampling: t0 (2 months before PB application), t1 (right after PB application, within the day), t2 (6 months after PB) and t3 (12 months after PB). Diverse colors signify distinct soil burn intensity levels. Effects tested according to Treatment (T), time (t) and Treatment:time interaction (T:t). Stars (* for p < 0.05, ** for p < 0.01, *** for p < 0.001) and letters according to statistically significant differences in mean values.

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