[American Society of Agricultural and Biological Engineers International Symposium on Erosion and Landscape Evolution (ISELE), 18-21 September 2011, Anchorage, Alaska - ()] International Symposium on Erosion and Landscape Evolution (ISELE), 18-21 September 2011, Anchorage, Alaska - Erosion Plot Monitoring: Impact of Different Tillage Systems on Average Annual Soil Erosion and the Significance of Extreme Rainfall Events