Southwide Pine Seed Source Study--Loblolly Pine at 25 Years
Abstract:A rangewide system of loblolly pine (Pinus taeda L.) seed source plantings has shown inherent variations in growth rate, fusiform rust resistance, and other less commercially important traits. Most of the variation is due to coastal-continental effects and to ecotypic differentiation of the loblolly population west of the Mississippi River. The western population is slower growing, more rust resistant, and more drought resistant than the eastern loblolly population, whereas coastal plain populations are faster growing, more susceptible to ice and cold, and less drought resistant than loblolly from areas with a more continental climate such as northern Georgia, Alabama, or Piedmont South Carolina. The differences in growth rate associated with these major physiographic and climatic effects are persisting as the test nears timber-rotation age, but the smaller growth-rate differences within physiographic regions are less stable.
Document Type: Journal Article
Affiliations: Principal Plant Geneticist, USDA Forest Service, Southern Forest Experiment Station, Forestry Sciences Laboratory, Gulfport, Mississippi 39503
Publication date: 1983-05-01
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- Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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