SCOTT BAUER / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY SCOTT BAUER / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
Editorial use only.
Chemist testing groundwater for nutrients. Groundwater can become contaminated by chemicals used in farming, such as nitrates, which make it unsafe to drink. This equipment, known as a flow- through calorimetric autoanalyser, determines compounds present in the water.
Model release not available. Property release not required.