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Growth and Yield Predictions for Lower Coastal Plain Slash Pine Plantations Fertilized at Mid-Rotation

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We present a new system of equations for slash pine plantations (Pinus elliottii Engelm. var. elliottii) that express the combined effects of CRIFF (Cooperative Research in Forest Fertilization Program) soil group and mid-rotation nitrogen (N) and phosphorus (P) fertilization on survival, basal area growth or yield, dominant height growth and the stand diameter distribution. A diameter growth model that accepts an initial diameter distribution (or tree list)provides the ability to predict future diameter distributions. Predictor variables include combinations of three mid-rotation fertilizer treatments: (1) no fertilizer; (2) N only (150 lb/ac elemental), (3) N and P (150 lb/ac and 50 lb/ac elemental, respectively) and three CRIFF soil groups: (1) B soils (e.g., Arenic Paleaquult), (2) C soils (e.g., Ultic Haplaquod), and (3) D soils (e.g., Grossarenic Haplaquod). These models derive from analyses on data taken in 243 permanent sample plots, some having been remeasured up to 6 times at 2 yr intervals, located in slash pine plantations on prepared sites. The models predict that fertilization with N and P at age 15 will result in around 30% (462 ft³/ac) more cumulative merchantable growth by age 25 for a typical site-index-60 plantation growing on CRIFF soil group B. South. J. Appl. For. 23(1):39-45.
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Document Type: Journal Article

Affiliations: School of Forest Resources and Conservation, University of Florida, Gainesville, FL 32611

Publication date: 1999-02-01

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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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