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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #47

Regeneration Histories of the Allegheny Plateau
To consolidate into one study all existing regeneration records and to schedule periodic remeasurement of these plots to enable researchers to refine existing guidelines.
expected to continue
Studies cover forested lands in Northwestern PA.
All existing data from 19 closed studies will be preserved in a standard computer format and some existing plots will be remeasured at regular intervals. Analysis: regression and multiple regression. Most data are from 6' radius plots, although a few studies used mil-acre and are seedling counts by species and height classes.
varies among studies
varies among studies
Independent: density, species composition, size of advance regeneration, deer population levels, cutting treatments, herbicide treatments, fertilizers, and numerous soil, site and stand variables.
Dependent: stocking of desirable species at various times.
Variables measured 2 ,5 ,10 , and 15 years after plot establishment.
Computer summary programs can catch error in data entry.
Raw data by plot reside on DG and tally sheets are kept with written instructions and detailed maps to each stand. Annually, the raw data are transformed using the REGEN1 program in DG Info. System. Summarized data by plot and by stand reside in a DG-based program that can output to ASCII text files.
Studies of Ecosystem Processes 
Landscape Scale Studies
Working plan: 1980. James Redding 
Establishment report:1981. 
Progress reports to date. 
The above are office reports of U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, Warren, PA.

Marquis, David A.; Bjorkbom, John C. 1982. Guidelines for evaluating regeneration before and after clearcutting Allegheny hardwoods. Res. Note NE-307. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4 p.

Susan Stout, USDA, Forest Service, P.O. Box 267, Irvine PA 16329. (814) 563-1040



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