1. General Model Information

Name: ORegon Growth ANalysis and projectiON

Acronym: ORGANON

Main medium: terrestrial
Main subject: forestry
Organization level: ecosystem, organism
Type of model: individual-based
Main application:
Keywords: tree growth, forest management, mixed conifer stands


Organon, Growth and Yield Project
College of Forestry
Department of Forest Resources
Oregon State University
280 Peavy Hall
Corvallis, OR 97331-5703, USA
Phone: (541) 737-4951
Fax: (541) 737-3049


David W. Hann


It is an individual tree growth model. It uses a list of trees, each with exact measurements, as input data. The user can specify periods of growth, in five year increments, and management such as thinning , fertilizing, and pruning. For each of the requested activities, the individual trees are modified to reflect the effects of the actions. The program produces stand statistics at each step, and yield tables after final harvest of the stand. Presently, ORGANON models two areas -- Mixed conifer, young-growth forest stands of Southwest Oregon, which have approximately 80% basal area in Douglas-fir, grand fir, white fir, ponderosa pine, sugar pine, and incense-cedar (SWO version); and young-growth Douglas-fir stands of the Western Willamette Valley of Oregon (WWV version). The model can project development of both even-aged and uneven-aged stands with ages ranging from 20 to 120 years. (Although it will project uneven-aged stands, the WWV version was developed primarily from data taken from even-aged stands.) The map shows the areas from which data was drawn for development of the two version http://www.cof.orst.edu/cof/fr/research/organon/orginf.htm

II. Technical Information

II.1 Executables:

Operating System(s):

II.2 Source-code:

Programming Language(s):

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

V. Further information in the World-Wide-Web

VI. Additional remarks

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Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:46 CEST 2002

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