A guide to the TWIGS program for the North Central United States.

Cynthia L. Miner; Nancy R. Walters; Monique L. Belli

doi:10.2737/NC-GTR-125

Treesearch

A guide to the TWIGS program for the North Central United States.

Informally Refereed

Authors:

Cynthia L. Miner, Nancy R. Walters, Monique L. Belli

Year:

1988

Type:

General Technical Report

Station:

Northern Research Station

DOI:

https://doi.org/10.2737/NC-GTR-125

Source:

General Technical Report NC-125. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 105 p.

Download (PDF 10.57 MB)

Download (PDF 10.57 MB): https://research.fs.usda.gov/download/treesearch/10189.pdf

Abstract

This is a complete reference to TWIGS, a forest growth-and-yield program with management and economic components developed for Lake and Central States tree species. The guide describes how TWIGS models growth and yield and how the model can be applied to obtain the best results. Step-by-step operating instructions are provided for TWIGS and its companion program, TREEGEN, which generates tree lists in readable format for TWIGS. The appendices include equations, coefficients, validation tables, and an example printout of a projection run.

Keywords

growth and yield (simulation), forest stand management (simulation), economics, computer programs (forestry), silviculture, STEMS

Citation

Miner, Cynthia L.; Walters, Nancy R.; Belli, Monique L. 1988. A guide to the TWIGS program for the North Central United States. General Technical Report NC-125. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 105 p.