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| Collection: | Fort Valley Experimental Forest historical photographs |
| Keywords: |
San Francisco Peaks defoliation chemical effect study |
| Organisms: | aspen |
| Location: | Coconino NF; AZ; USA |
| Description: | Aspen Trees |
| Date: | 09/12/1949 |
| Collection: | Sierra Ancha Historical Images |
| Keywords: |
grasses regeneration defoliation overgrazed chemical effect |
| Location: | Tonto NF; AZ; USA |
| Description: | Watershed Project |
| Date: | 11/1928 |
