Image Number D2423-1
Bill Kustas, ARS hydrologist at Beltsville, MD, checks the position of a water vapor/carbon dioxide (CO2)sensor on a micrometeorological tower. The instrument measures the exchange of water, energy, and CO2 between the soil-plant system and the lower atmosphere.
Photo by Peggy Greb.
640 pixels wide: (D2423-1.jpg)
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