Dr. Steve Holbrook and a world-class team of geophysics experts from Wyoming's NSF Center for Hydrology and Geophysics (WyCEHG) will work at the Calhoun CZO for four days in early April. Wednesday thru Saturday, 4/9-4/12, they will begin a collaboration with Calhoun CZO investigators that will span several years. Belowground geophysical properties will be observed across the landscape and down the CZO's new 70-meter deep groundwater well. Wednesday they are planning to lower a number of instruments down the well. Thursday to Saturday, they will work at the landscape scale, on watersheds and long-term forest soil plots that make up the Calhoun CZO research areas.