Skip to Main Content
A new type of density-management diagram for slash pine plantationsAuthor(s): Curtis L. VanderSchaaf
Source: Gen. Tech. Rep. SRS-92. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 375-378
Publication Series: Miscellaneous Publication
PDF: Download Publication (288 KB)
DescriptionMany Density-Management Diagrams (DMD) have been developed for conifer species throughout the world based on stand density index (SDI). The diagrams often plot the logarithm of average tree size (volume, weight, or quadratic mean diameter) over the logarithm of trees per unit area. A new type of DMD is presented for slash pine (Pinus elliottii var elliottii) plantations where SDI is plotted over age. This proposed DMD eliminates two existing problems with current DMDs: (1) the need to estimate age from other measures found on traditional DMDs, and (2) a second variable also directly dependent on either age or SDI can be placed on a third axis. Plotting SDI over age clearly shows when thinnings need to be conducted to obtain a certain tree size-density objective both in terms of stand density and age. Yet this proposed DMD does not violate the well-known principle that DMDs are independent of age. Understory models are usually developed using an overstory density measure that includes both trees per unit area and a diameter measure (i.e. basal area per unit area or SDI per unit area) making it difficult to include them on current DMDs. Plotting SDI over age allows understory vegetation development to be easily included on a DMD. This provides a natural resource manager the ability to see what impacts a particular tree sizedensity objective has on understory vegetation production over time. An understory vegetation model was developed to demonstrate the applicability of the proposed DMD.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationVanderSchaaf, Curtis L. 2006. A new type of density-management diagram for slash pine plantations. Gen. Tech. Rep. SRS-92. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 375-378
- Development of a stand density index equation for slash pine stands
- Precommercial thinning of naturally seeded slash pine increases volume and monetary returns
- An Old-Growth Definition for Tropical and Subtropical Forests in Florida
XML: View XML