Stand density management diagram
- Stand density management diagram
A Stand Density Management Diagram is best described as a “simple biological model relating yield and density at any stage of stand development” [Kershaw, J. A., and B.C. Fischer. 1991. A stand density management diagram for sawtimber sized mixed upland central hardwoods. pp. 414-428 in McComick, L.H. and Gottschalk, K.W., eds. Proceedings, 8th Central hardwood forest conference.] . Stand density management diagrams are used in forest management and designed to use current stand density to project what the future of the stand will look like.][ [http://www.for.gov.bc.ca/hfp/publications/00169/SDMD_get.pdf British Columbia Ministry of Forestry. How to use a stand density management diagram. Published 1997. Accessed 17 March 2008.] ] One major reason for the effectiveness of density management diagrams is the relatively low effect of site variance on the diagram’s shape. Density management diagrams are a transformation of the traditional ideas held in stocking diagrams. Gingrich came up with the idea of comparing basal area per acre, trees per acre, and quadratic mean diameter in one graph. He called this the stocking diagram.]The diagram itself is comprised of a plot of the Natural log (ln) of the volume or yield against the natural log] of stems per acre. Just like a stocking diagram, the A-line, B-line, and C-line are plotted. In addition, the -3/2 rule maximum density line is plotted just above the A-line.
ee also
*Stand Density Index
References
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