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Retracing net erosion rates linked to land use change in tropical agricultural catchments dominated by small-holder farmers is challenging, due largely to catchment heterogeneity and uncontrolled farming practices. To tackle this problem and to complement a preceding study (Brandt et al., 2016), we introduce here an advanced approach that integrates compound-specific δ¹³C isotopes (CSSI) and fallout radionuclides (FRN), Excess lead-210 (²¹⁰Pb_ex) and Cesium-137 (¹³⁷Cs) to estimate past net erosion rates of dominant land use types in the mountainous catchment Chieng Khoi (207 ha, Northwest Vietnam). Spatially-integrated topsoil (0 to 2 cm) samples of dominant land use types (e.g., protected and secondary forests, teak, fruit orchards, maize, cassava) were collected from at least three discrete plots of each land use type within the upland area (i.e., erosion sites) of the studied catchment. In the …