Disc Behind the Discs Copyright © 2000 John A. Lind

• Olympus OM-4
• 50mm f/1.2 Zuiko MC
• Exposure data not recorded
• Kodak Elitechrome 100
• Hobson's Bluffdale, near Eldred, Illinois, May 2000
• These discs are used to slice into the ground so anhydrous amonia can be injected directly into the field.  The discs open up the earth for the injectors and then close it back again.