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Go to:53. Shelterwood Removal and Mowing Study

Go to:55. Evaluation of Allegheny Hardwood Site Quality

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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #54

Herbicide-Shelterwood Trials
1) test herbicide-shelterwood sequence at a semicommercial scale on a variety of sites, 
2) gather information on costs of herbicide application, and 
3) gain experience with mechanized ground application technique.
The study is located on the lands of the Allegheny National Forest (PA), International Paper Company, PA Bureau of Forestry.
8 20-acre treatment plots each contains 20 0.001-acre regeneration plots for a total of 160 regeneration plots.
10 acres of each plot were treated with 1#/A ai Roundup during August 1979 and the remainder 10 acres were untreated. The entire 20-acre stand was cut leaving a residual basal area of 60% within 2 years after spraying Roundup. Fern and grass control, and establishment and growth of hardwood seedlings were observed until stocking was adequate.
In regeneration plots, all woody commercial and noncommercial species were measured by height class 1) and 2) <1', 1'-3', 3'-5', >5' and 3) <0.1',<1', 1'-3', 3'-5', >5'. Herbaceous cover was also measured in regeneration plots.
Seedling counts by species and height class, and herbaceous cover.: 1979, 1980, 1981, 1983, 1986.
Safety regulations were followed with all herbicide use.
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
Study plan. 1979. Stephen Horsley 
Environmental Assessment report. 1979. Stephen Horsley. 
Progress reports. September 1982, May 1988, October 1984. 
The above are office reports of U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, Warren, PA.

Horsley, S.B. 1994. Regeneration success and plant species diversity of Allegheny hardwood stands after roundup applications and shelterwood cutting. Northern J. Appl. For. 11: 109-116.

Stephen Horsley, USDA, Forest Service, P.O. Box 267, Irvine, PA. 16329. (814) 563-1040
Allegheny National Forest (PA.), International Paper Company, (PA.), PA. Bureau of Forestry.



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