| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Early Release and Fertilization Study in Spruce-Fir" sign and spruce regeneration in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Row Spacing and Release, Unfertilized" sign and spruce saplings in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "8x8' spacing, Fertilized" sign in front of spruce regeneration in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Row spacing Only, Fertilized" sign in front of spruce regeneration in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration |
| Organisms: |
spruce eastern white pine balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Spruce, eastern white pine, and balsam fir regeneration with a mixedwood overstory in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Spaced spruce saplings in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: | regeneration |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Comparison of 1-, 4-, and 8-year-old spruce seedlings with a ruler |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
plot regeneration |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Regeneration assessment in sample plot |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
regeneration damage |
| Organisms: |
pine spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Conifer leader damage, ice and snow |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: | regeneration |
| Organisms: | eastern white pine |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Eastern white pine regenerating under hardwoods |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
plot regeneration |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Plot with wire cage, likely an animal exclosure |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: | regeneration |
| Organisms: |
spruce balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Balsam fir and spruce regeneration |
| Date: |












