1. General Model Information

Name: NorthPro


Main medium: all
Main subject: forestry
Organization level: Landscape, Ecosystem
Type of model: Matrix Growth Model, Markov chain, other
Main application: simulation/optimisation tool, decision support/expert system, research
Keywords: Northern Hardwoods, Uneven-aged Management, Economics, Growth model, Diversity


Jingjing Liang
Room A141, Russell Lab, 1630 Linden Drive,
Madison, WI 53706

Phone: 608-263-5574
Fax: (608) 262-9922
email: jliang2@wisc.edu
Homepage: http://www.forestmodel.com


Jingjing Liang, Joseph Buongiorno, Audra Kolbe and Benedict Schulte


NorthPro is a Microsoft Excel add-in program to simulate the growth and management of uneven-aged northern hardwood stands of the maple-beech-birch type in Wisconsin or Michigan. Its built-in growth models were calibrated from 623 uneven-aged plots in Wisconsin and 1,259 plots in Michigan. Stands are described by the number of trees per unit area in each of 12 size classes in the following species groups: shade-tolerant, mid-tolerant, and shade-intolerant species. NorthPro allows managers to predict stand development by year and for many decades from a specific initial state. Users can choose cutting regimes by specifying the interval between harvests (cutting cycle) and a target distribution of trees remaining after harvest. A target distribution can be a BDq distribution or any other desired distribution. Diameter-limit cuts can also be simulated. Tabulated and graphic results show diameter distributions, basal area, volumes, income, net present value, and indices of stand diversity by species and size. This manual documents the program installation and activation, provides suggestions for working with Excel, and gives background information on NorthPro’s growth model. It offers a comprehensive tutorial, in the form of two practical examples, that explains how to start the program, enter simulation data, execute a simulation, compare simulations, and plot summary statistics.

II. Technical Information

II.1 Executables:

Operating System(s): WIN 98-XP
ForestModel.com -- NorthPro (free download)

II.2 Source-code:

Programming Language(s): VBA (Visual Basic for Applications), Excel

contact Authors

II.3 Manuals:

NorthPro : A Spreadsheet Program for the Management of Uneven-aged Northern Hardwood Stands
ForestModel.com -- NorthPro (WORD doc)

II.4 Data:

see II.1

III. Mathematical Information

III.1 Mathematics

see NorthPro Manual

III.2 Quantities

III.2.1 Input

see NorthPro Manual and
ForestModel.com -- NorthPro, examples

III.2.2 Output

see NorthPro Manual

IV. References

see NorthPro Manual

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: : Mon Dec 8 22:13:26 2003
Status of the document: Contributed by Jingjing Liang
last modified by Joachim Benz Fri Dec 12 18:36:40 CET 2003

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