A visit to switchgrass? trial plots run by Iowa State University researchers; near Ames, IA. Photo by CL Williams, 2010.
Perennial non-food plants grown for bioenergy? feedstock? using a cropping systems approach to production which may or may not include tillage, and application of inputs such as fertilizer and pesticides.

A visit to switchgrass? trial plots run by Iowa State University researchers; near Ames, IA. Photo by CL Williams, 2010.