| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration sign plot |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "8x8' Spacing, Fertilized" sign in front of spruce saplings in plot 3 in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration sign plot |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Row Spacing and Release, Unfertilized" sign and spruce regeneration in plot 51 in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning sign plot |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "8x8 Spacing, Fertilized" sign in front of spruce saplings in plot 7 in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning sign plot |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Row spacing Only, Unfertilized" sign in front of spruce in plot 20 Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
personnel plot |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Two personnel conducting a field assessment |
| Date: |





