CORE 4 Conservation: provides common sense approaches to natural resource conservation topics.
Erosion
Estimating Random Roughness in the Field - a collection of photographs taken from USDA Agriculture Handbook 703 "Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE).
Wind and Water Erosion Pictures, 1935-1975 - a collection of photographs taken by USDA Natural Resources Conservation Service staff across the USA between 1935 and 1975
