National Integrated Drought Information System 1 article published in JoVE Environment In Situ Soil Moisture Sensors in Undisturbed Soils Todd G. Caldwell1, Michael H. Cosh2, Steven R. Evett3, Nathan Edwards4, Heather Hofman5, Bradley G. Illston6, Tilden Meyers7, Marina Skumanich8, Kent Sutcliffe9 1Nevada Water Science Center, U.S. Geological Survey, 2Agricultural Research Service, Hydrology and Remote Sensing Lab., U.S. Department of Agriculture, 3Agricultural Research Service, Conservation and Production Research Lab., U.S. Department of Agriculture, 4South Dakota State University, 5National Water and Climate Center, U.S. Department of Agriculture, 6University of Oklahoma, 7Air Resources Lab, National Oceanic and Atmospheric Administration, 8National Integrated Drought Information System, National Oceanic and Atmospheric Administration, 9Snow Survey Staff, U.S. Department of Agriculture The determination of soil water content is a critical mission requirement for many state and federal agencies. This protocol synthesizes multi-agency efforts to measure soil water content using buried in situ sensors.