300 dpi: (d2402-1.jpg)
640 pixels wide: (d2402-1.jpg)
 Image Number D2402-1 |
Subsurface drainage water from individual field plots is routed to this sump where flow is measured and samples are prepared for nitrate testing. Here, soil microbiologist Tom Moorman takes a water sample for nitrate analysis.
Photo by Peggy Greb.
