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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #31

Cultural Treatments Designed to Reduce Spruce Sawlog Rotation Age
To determine whether cultural treatments can reduce spruce sawlog rotation age.
1976
expected to continue
Penobscot Experimental Forest, Bradley, ME. USGS 15-min series topo Orono ME Quadrangle. UL: 4969400mN 528800mE or 44deg, 48min,30 sec by 68deg,34min,00sec. LR: 4961300mN 534900mE or 44deg, 52min, 45sec by 68deg, 37min, 30sec. 
Soils are derived from glacial till composed of slate and shale geologic material. The stony fine sandy loam is poorly drained. The study area is predominantly spruce-fir.
Completely randomized 2-factor design with 4 treatments per replication. The thinning-fertilizer combinations will be assigned at random to the 32 80'x80' plots including 8 control plots. 
(Subset of Compt Mgmt Study NE-4151-007 (compartment 21)).
100%
Pre-establishment treatments included: harvest 1957 of 46% of original volume, final harvest in 1967. Establishment in 1976 of 32 80'x80' plots, 1/2 of these treated with inorganic fertilizer. Plots received 8 treatments. Some plots may receive additional thinning. The treatment combinations were: 
Conventional spruce crop-tree release - no fertilizer, 
Conventional spruce crop-tree release - fertilizer, 
Mechanical row thinning - Spruce crop-tree release in the residual strip - no fertilizer, 
Mechanical row thinning - Spruce crop-tree release in the residual strip - fertilizer, 
Mechanical row thinning - no crop-tree release in the residual strip - no fertilizer, 
Mechanical row thinning - no crop-tree release in the residual strip - fertilizer,
Control - no release - no fertilizer, 
and Control - no release - fertilizer.

2-Stage shelterwood system was used to prep forests. 
Removal of holdover trees > or = 5" d.b.h.: winter and spring 1976.
Thinning treatments: April through August 1976. 
Removal of residual holdover trees older than 20 years: October 1976. 
Fertilizer application: Spring 1977 and Spring 1978.

100% sample of designated crop trees.
Plot survey: 1975. 
Independent: treatments.

Dependent:
The following measurements were taken in 
1976,1979,1975,1986,1991,1994 (18.5 growing seasons) 
Average annual d.b.h. growth of trees >0.5" d.b.h.,
Average annual height growth,
Crown length, average crown width, crown area and volume, 
Average annual root collar growth, 
Basal area per acre of trees >0.5" d.b.h., 
No. trees per acre >0.5" d.b.h., 
Average d.b.h. of trees >0.5" d.b.h. 
Soil samples (3 soil samples per plot): October 1976. 

Visual check of raw data and the use of error-checking computer programs.
~5 mbytes on PC, paper, and diskettes.
Studies of Ecosystem Processes
1995
Study plan. R.M. Frank

Establishment report. R.M. Frank, B.M. Blum, and M.M. Czapowskyj. 
Supplement No. 1. March 1977. R.M. Frank, B.M. Blum, and M.M. Czapowskyj.
Supplement No. 2. August 1986. R.M. Frank, BM Blum, and M.M. Czapowskyj.

Office report. Frank, R.M. 1983. Summary Progress report for the Period Mid-Growing Season of 1976 to the Mid-Growing Season of 1983. (7 growing seasons).

Office report. Frank, R.M. 1987. Summary Progress report for the Period Mid-Growing Season of 1976 to the Mid-Growing Season of 1986. (10 growing seasons).

Office report. Frank, R.M. 1992. Summary Progress report for the Period Mid-Growing Season of 1976 to the Mid-Growing Season of 1991. (15.5 growing seasons).

The above are office reports of U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, Orono, ME.

John Brissette / Laura Kenefic, USDA Forest Service, P.O. Box 640, Durham, NH 03824. (603) 868-7632
none

 

  

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