640 pixels wide: (k8697-1.jpg)
![]() Image Number K8697-1 |
Technician Andrew Pond uses an iron oxide test strip to measure the amount of phosphorus present in a runoff sample.
Photo by Scott Bauer.
640 pixels wide: (k8697-1.jpg)
![]() Image Number K8697-1 |
Technician Andrew Pond uses an iron oxide test strip to measure the amount of phosphorus present in a runoff sample.
Photo by Scott Bauer.