USGS employee sampling recharged groundwater beneath an agricultural f

(Public domain.)
Detailed Description
USGS employee sampling recharged groundwater beneath an agricultural field. Photo from USGS circular 1352 "Water quality in the Glacial Aquifer System, Northern United States, 1993 - 2009.
Details
Image Dimensions: 2891 x 2211
Date Taken:
Location Taken: US