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Go to:24. Permanent Sample Plots for Baseline Vegetation Monitoring Plots in New Hampshire and Vermont

Go to:26. Growth Impact Study

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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #25

Survival and Development of Advanced Regeneration After a Final Shelterwood Harvest
1) To document survival and development of regeneration with various characteristics, after overstory removal. 
2) To follow the survival, growth and development of individual spruce-fir.
expected to continue
Compartments 7A and 7B on the Penobscot Experimental Forest in north central Maine. Forest type is spruce-fir. Both compartments were previously managed as farm woodlots using the shelterwood system of silviculture.
Initially 25 0.001-acre plots on each of the 2 compartments. After second harvest was completed, a total of 50 0.001-acre plots were measured annually for 5 years on each of the 2 compartments.
First cut of a 2-stage shelterwood was performed to convert the area to even-age management on both compartments: 1968. 
Removal of trees in the remainder of the stand as would occur normally under a shelterwood cut: 1979.
Numbers of seedlings were recorded by species and size class. The following size classes were used: 6" to 1', 1.1' to 2', 2.1' to 4.5' ht, 4.6' ht to 0.5" d.b.h. Seedlings <6" were sub-sampled and counted by 1" size classes in a permanent circular plot 1.5 meters in diameter (0.0002 hectares) in the center of each 0.001-acre plot. After 1980, each plot received a slash rating (none, light, moderate, moderate to heavy, or heavy) during spring 1979.
Initial numbers of seedlings, of a given species and size class (per plot/per acre) as measured in the spring of 1978. 
Slash-condition rating of plot. 
Root collar diameter. 
Crown diameter. 
Tree species.

Number of seedlings of a given species ( red, white and black spruce were not separated) and size class per plot/per acre as measured annually. 
Total Height (to the nearest cm). 
Maximum crown width (to the nearest cm). 
Diameter growth at root collar (to the nearest mm).

100% pre- and post- harvest inventory of seedlings: 1978 and 1979.
Growth measurements: 1979 to 1983 (annually).

Computer program in lab checks data as it is entered.
Raw - 2 9-track tapes, paper.
Studies of Ecosystem Processes 
Study plan. 1979. Barton Blum. 
Office report. regeneration and early development of seedling stands 
Following a spruce-Fir Shelterwood harvest. 1990. Barton Blum and Dale Solomon. 

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

Linda Heath, USDA Forest Service, P.O. Box 640, Durham NH 03824. (603) 868-7666



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