Thirty-Seven Year Performance of Loblolly Pine Seed Sources in Eastern Maryland
Abstract:Nine loblolly pine seed sources from The Southwide Southern Pine Seed Source Study were planted on the eastern shore of Maryland. After 20 yr, the local Maryland source had the highest yield, and the southernmost source, from Livingston Parish, LA, the lowest yield. At age 37, the Texas and Arkansas sources had the highest volumes and Maryland and Livingston Parish the lowest. The Maryland source had good height, but above-average mortality and small diameters. Texas and Arkansas sources, originating from areas where droughts are common, were below average in height at age 37, but yield was best because of better survival. These sources appear to be more tolerant of competition and less damaged by beetles after prolonged drought. Better regulation of stand density was needed to optimize yields of all seed sources. For. Sci. 39(4):706-721.
Document Type: Journal Article
Affiliations: Principal Plant Pathologist (now deceased), USDA Forest Service Southern Forest Experiment Station, Gulfport, MS 39505
Publication date: November 1, 1993
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