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Go to:16. Applying Group Selection in Central Appalachian Hardwoods
 
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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #15

Title:
Crop Tree Release (Two-Age Management) in Mature Appalachian Hardwood Stands
Objective: To evaluate individual tree and stand response when applying a crown release to 80- to 85-year-old codominant crop trees growing on an excellent Appalachian hardwood site.
Year Established: 1990
Year Completed: expected to continue
Site Description: Fernow Experimental Forest, compartment 16A
Statistical Design: Case history: designed to establish 4 6-acre adjacent units. Each unit will receive a separate treatment.
Likelihood of Locating Study Areas: 100%
Experimental Treatments: 1) All sawtimber-size trees (11.0" d.b.h. plus) were cut using the crop tree-crown touching approach. 
2) Cut all merchantable sawtimber trees (no culls present) except the crop trees. 
3) Cut all sawtimber trees using crown-touching. 
4) Cut all pole-size trees 5.0" to 0.9" d.b.h. and cut all trees 1.0" d.b.h. Plus except crop trees.
Sampling Methods:
Variables and Sampling Frequency: Independent: crop tree release technique and two-age management.

Dependent: tree d.b.h., quality, crown development, reproduction, volume, and basal area.

Periodic measurement will be recorded for initial, post logging, 2-yr, 5-yr, 7-yr, 10-yr, and 5-yr thereafter until next treatment period.

QA/QC Practices: Data are visually compared to previously collected data. Accuracy assessments are completed after each data-collection period. Permanent employee continually supervises temporary employees.
Data Storage: Raw: stand structure and grade, species, d.b.h., and number of stems available on DG. 
Species, d.b.h., And number of stems are in hardcopy. Data are downloaded to PCs for analyses.
Global Change Research Applications: Studies of Ecosystem Processes
Data Availability: 1996
Publications and Reports: Miller, G. W. and T.M. Schuler. 1995. Development and quality of reproduction in two-age central Appalachian hardwoods - 10- year results. In: Gottschalk, K.W.; Fosbroke, S.L.C., eds. Proceedings, 10th central hardwood conference; 1995 March 5-8; Morgantown, WV. Gen Tech. Rep. NE-197. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 577p.
Contact: Thomas Schuler,  USDA Forest Service,  P.O. Box 404, Parsons WV 26287. (304) 478-2000 ext. 110.
Cooperation:  Arlyn Perkey, USDA Forest Service, Northeastern Area State and Private Forestry.

 

 

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