A Risk of Soil Erosion Indicator (SoilERI) was developed in Canada through the National Agri-Environmental Health Analysis and Reporting Program (NAHARP) and was applied to Soil Landscapes of Canada (SLC) polygon scale. The SoilERI is an integration of tillage, water and wind erosion indicators (TillERI, WaterERI and WindERI). To validate the SoilERI, three representative SLC polygons were selected from each EcoZone and the TillERI, WaterERI and WindERI were validated against more sophisticated tillage, water and wind erosion models, i.e. the Tillage Erosion Model (TillEM), Revised Universal Soil Loss Equation 2 (RUSLE2) and the Wind Erosion Equation (WEQ), respectively. These more sophisticated erosion models were validated against Cs-137 data collected from 6 sites located in Manitoba, New Brunswick, Alberta and Ontario. Preliminary results show that the SoilERI estimates reflect the major patterns of total soil erosion in different EcoZones and the changes of total soil erosion over time. However, there are discrepancies, in some cases, large discrepancies between the SoilERI-estimated and the model-estimated soil erosion rates. When tested against the Cs-137 data, tillage and water erosion appeared to be the major forms of erosion in most Canada's agricultural land. The pattern of the model-estimated soil erosion generally agreed well with that of the Cs-137-estimated soil erosion. Systematic discrepancies did exist and were mainly due to the inaccuracy of the model input data. It was concluded that the SoilERI is sufficiently accurate for the assessment of soil erosion patterns on the SLC scale but the estimated soil erosion rate is only accurate relatively not absolutely.