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Height initiation, and height and diameter growth of longleaf pine (Pinus palustris) seedlings were compared on plots receiving herbaceous weed control treatments and on unweeded check plots during the first 4 years after planting. Treatments initiated during the spring following planting included: broadcast weed control for 1 and 2 years, banded weed control in 5-foot bands for 1 and 2 years, and no weed control (check). Weed control had a positive effect on fourth-year height, groundline diameter, and the percentage of seedlings out of the grass stage, while survival was unaffected. The duration of weed control (2 years vs 1 year) had a similar effect on the same response variables, while the method of weed control (broadcast vs. band) had no effect. Trees on plots receiving 2 years of weed control were approximately 3 feet taller and 0.5 inch greater in groundline diameter than trees receiving no weed control. One year of weed control resulted in trees approximately 2 feet taller and 0.3 inch greater in groundline diameter than with no weed control. Weed control treatments shortened the time seedlings were in the grass stage by approximately 1 year, decreasing the time period during which a serious brown-spot needle blight infection could develop.¹
Document Type: Journal Article
Department of Forestry, Alabama Agricultural Experiment Station, Auburn University, Auburn AL 36830
Publication date: November 1, 1985
More about this publication?
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.