Fig. 4From: Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast ChinaObserved respiration rates for topsoil and subsoil as a function of the geomorphic position (non-eroding, eroding and depositional). The respiration per unit soil (a) and per unit of SOC (b) is given. The same letter indicates no significant differences between different geomorphic positions for the two depth classes (p < 0.1, tested for panel a, b separately)Back to article page