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Full-Text Articles in Forest Sciences
Patterns Of Regeneration Of Eastern White Pine (Pinus Strobus L.) As Influenced By Large Isolated Reserve Trees And Precommercial Thinning, Kate E. Zellers
Patterns Of Regeneration Of Eastern White Pine (Pinus Strobus L.) As Influenced By Large Isolated Reserve Trees And Precommercial Thinning, Kate E. Zellers
Electronic Theses and Dissertations
The spruce budworm epidemic of the 1970s and 1980s led to the salvage harvesting of spruce-fir stands, serving as a release for scattered immature eastern white pine (Pinus strobus L.) trees. These pines are now growing as large isolated reserve trees above a mixed conifer regeneration stratum. The objectives in this study were to determine any effect of varying levels of basal area (m2 ha-1) of large pine reserve trees may have on (1) the densities (stems ha-1) of both eastern white pine and non-pine species in the developing regeneration stratum, and (2) the …
Long-Term Effects Of Herbicide And Precommercial Thinning Treatments On Species Composition, Stand Structure, And Net Present Value In Spruce-Fir Stands In Maine: The Austin Pond Study, R. Howard Daggett
Electronic Theses and Dissertations
The long-term effect on the development of spruce-fir stands in Maine from combinations of herbicide (Glyphosate, Triclopyr, 2,4-D, 2,4,5-T, MSMA, Picloram, Water, and Control) and precommercial thinning (PCT and no PCT) treatments was examined 22 years after herbicide application and 13 years after PCT. The mean IRR for the herbicide treatments with no thinning was 8.2%. For PCT only the IRR was 6.3%. The mean IRR for plots receiving both herbicide and PCT treatments was 5.8%. Therefore, the rate of return for both herbicide and PCT and combinations of the two treatments would be acceptable to many investors.
Assessing Forest Damage And Tree Response To Ice Storm Injury In Thinned And Unthinned Hardwood Stands In Maine, Julie Lee Swisher
Assessing Forest Damage And Tree Response To Ice Storm Injury In Thinned And Unthinned Hardwood Stands In Maine, Julie Lee Swisher
Electronic Theses and Dissertations
In January 1998, a severe ice storm struck the northeastern United States, causing severe injury to forested areas. Forest damage from ice storms is a result of glaze formation on twigs and branches. Ice storms are recognized as severe disturbances due to their highly destructive nature as a result of ice glaze. Researchers and landowners have been concerned that thinned stands are more susceptible to ice injury than their unthinned counterparts. Thinned stands have fewer trees per area and thus less inter-tree support. In addition, the effects of wind maybe greater in thinned stands. The objectives of this study were …