| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU16 Compartment Management Study selection system regeneration |
| Organisms: |
red spruce eastern hemlock balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Large red spruce and eastern hemlock with a sapling understory of balsam fir in a selection stand, in MU16 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU16 Compartment Management Study selection system regeneration |
| Organisms: |
balsam fir red spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Prolific balsam fir reproduction and some red spruce in a forest opening in a selection stand, in MU16 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU2 Farm Woodlot Study selection system regeneration |
| Organisms: |
white spruce balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | White spruce 10 inches dbh, balsam fir coming in opening, larger fir are 6 feet tall, in MU2 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU20 Compartment Management Study selection system |
| Organisms: | red spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Red spruce in MU20 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU21 Compartment Management Study shelterwood system |
| Organisms: | balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Shelterwood silviculture, in MU21 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU23 Compartment Management Study shelterwood system regeneration |
| Organisms: | balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | 6-10 foot tall balsam fir in a 15 year-old opening in MU23 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU23 Compartment Management Study shelterwood system damage personnel |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Person evaluating blowdown in MU23 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU29 Compartment Management Study shelterwood system regeneration |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Image of conifer regeneration in MU29 (3-stage shelterwood) |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU29 Compartment Management Study shelterwood system regeneration |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Image of conifer regeneration in MU29 (3-stage shelterwood) two years after final harvest of the overstory |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU33 Biomass Harvesting Study strip clearcut regeneration plot |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Edge of a strip clearcut with a metal seed trap visible in MU33 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU33 Biomass Harvesting Study strip clearcut personnel road regeneration |
| Organisms: |
red maple eastern white pine aspen |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Robert M. Frank standing on PEF road next to strip clearcut, hardwood regeneration present, in MU33 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU33 Biomass Harvesting Study strip clearcut personnel regeneration |
| Organisms: | aspen |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Robert M. Frank measuring aspen regeneration in a strip clearcut in MU33 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU5 Compartment Management Study selection system |
| Organisms: |
black spruce balsam fir |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Black spruce and balsam fir, in MU5 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Spruce regeneration in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Spruce regeneration in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning regeneration |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Spruce regeneration 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: | "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 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 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 |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "8x8' spacing, Fertilized" sign in front of spruce in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning sign |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Descriptive signs in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "8x8' spacing, Fertilized" sign in front of spruce in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Control, No Release, Unfertilized" sign in front of spruce in Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "8x8' spacing, Fertilized" sign in front of spruce 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 sign |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | "Control, No Release, Unfertilized" sign in front of spruce 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: |
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 aerial photo |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Aerial image of Study 58 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
Study 58 thinning personnel |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | People having a discussion 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: |
MU90 Cutting Practice Level Study damage |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Soil disturbance caused by rubber-tired skidder during selection cutting, in MU90 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU90 Cutting Practice Level Study damage |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Soil disturbance caused by skidder during selection cutting, in MU90 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU90 Cutting Practice Level Study selection system |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Selection stand, in MU 90 |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
MU90 Cutting Practice Level Study sign infrastructure |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | A display of a cord of wood in MU90 |
| 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: |
personnel logging |
| Organisms: | pine |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Robert M. Frank assessing conifer logs at a landing |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
personnel thinning |
| Organisms: | spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Two people conducting precommercial thinning in a conifer stand |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
personnel road |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Two personnel hammering a post into shallow water |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
personnel logging |
| Organisms: | red spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Robert M. Frank posing with a felled 250 year-old 18-inch dbh red spruce |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: |
personnel damage |
| Organisms: | white spruce |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Tom Skratt assessing brash failure in white spruce |
| Date: |
| Collection: | Penobscot Experimental Forest Historical Photo Archive |
| Keywords: | personnel |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Arthur Hart debarking logs, peeling pulpwood with a bark spud |
| 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: | road |
| Location: | Penobscot Experimental Forest; Maine |
| Description: | Road at the Penobscot Experimental Forest in winter |
| 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: |