Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

USFS Logo Research Data Archive
You are here: Home > Search Results


*To download images in addition to list, filter to 100 images or fewer.
Displaying items 21 - 30 of 105
10 | 20 | 50 per page
Balsam woolly aphid (adelgid) stem attack classified as heavy, on June 3 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: personnel
damage
Organisms: balsam fir
balsam woolly adelgid
Location: Penobscot Experimental Forest; Maine
Description: Balsam woolly aphid (adelgid) stem attack classified as heavy, on June 3 1958
Date: 6/3/1958

Balsam woolly aphid (adelgid) stem attack, close up of "wool," on June 3 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: damage
Organisms: balsam fir
balsam woolly adelgid
Location:
Description: Balsam woolly aphid (adelgid) stem attack, close up of "wool," on June 3 1958
Date: 6/3/1958

Balsam woolly aphid (adelgid) stem attack, on June 3 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: personnel
damage
Organisms: balsam fir
balsam woolly adelgid
Location: Penobscot Experimental Forest; Maine
Description: Balsam woolly aphid (adelgid) stem attack, on June 3 1958
Date: 6/3/1958

Balsam woolly aphid (adelgid) stem attack, on June 3 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: personnel
damage
Organisms: balsam fir
Location: Penobscot Experimental Forest; Maine
Description: Balsam woolly aphid (adelgid) stem attack, on June 3 1958
Date: 6/3/1958

Dense second-growth balsam fir (image used in silvics paper), in June 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: personnel
Organisms: balsam fir
Location: Penobscot Experimental Forest; Maine
Description: Dense second-growth balsam fir (image used in silvics paper), in June 1958
Date: Jun-58

Arthur Hart in a second-growth balsam fir stand, balsam fir regeneration by building, in June 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: personnel
regeneration
Organisms: balsam fir
Location: Penobscot Experimental Forest; Maine
Description: Arthur Hart in a second-growth balsam fir stand, balsam fir regeneration by building, in June 1958
Date: Jun-58

Balsam fir (photo used in silvics paper) in MU7B in February 1958
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: MU7B
Farm Woodlot Study
selection system
Organisms: balsam fir
Location: Penobscot Experimental Forest; Maine
Description: Balsam fir (photo used in silvics paper) in MU7B in February 1958
Date: Feb-58

Balsam fir regeneration in opening east of swamp on Harper Drive in April 1957
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: personnel
regeneration
Organisms: balsam fir
Location: Penobscot Experimental Forest; Maine
Description: Balsam fir regeneration in opening east of swamp on Harper Drive in April 1957
Date: Apr-57

Opening made 12 years ago, with balsam fir, eastern hemlock, and white pine seedlings up to 1 foot tall, in MU13 on July 5 1956
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: MU13
Compartment Management Study
diameter-limit cut
regeneration
Organisms: balsam fir
eastern hemlock
eastern white pine
Location: Penobscot Experimental Forest; Maine
Description: Opening made 12 years ago, with balsam fir, eastern hemlock, and white pine seedlings up to 1 foot tall, in MU13 on July 5 1956
Date: 7/5/1956

Pre-cut balsam fir stand with 8-9 inch dbh fir marked, photo point #1 in MU13 on July 5 1956
more info/bigger image
Collection: Penobscot Experimental Forest Historical Photo Archive
Keywords: MU13
Compartment Management Study
diameter-limit cut
marking
personnel
photo point
Organisms: balsam fir
Location: Penobscot Experimental Forest; Maine
Description: Pre-cut balsam fir stand with 8-9 inch dbh fir marked, photo point #1 in MU13 on July 5 1956
Date: 7/5/1956