Photographs
The National Renewable Energy Laboratory (NREL) maintains a searchable online library of photographs called Photographic Information Exchange (PIX).
A selection of biomass PIX photos can be found on the NREL site.
The USDA Natural Resources Conservation Service Photo Gallery is an excellent source for agricultural and forestry biomass resource photographs. Additionally, a selection of good photos of potential dedicated bioenergy crops, such as switchgrass and poplars, can be found at Oak Ridge National Laboratory's Bioenergy Feedstock Development Program.