OAKSIM
OAKSIM

Author: Donald E. Hilt

Publisher:

Published: 1985

Total Pages: 24

ISBN-13:

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S2OAKSIM is an individual-tree growth and yield simulator for managed, even-aged, upland oak stands. Growth and yield projections for various thinning alternatives can be made with OAKSIM for up to 50 years. Simulator components include an individual-tree diameter growth model, a mortality model, height prediction equations, bark ratio equations, a taper based volume system, and a mathematical thinning rule based on actual data. The range of age, site, and stand conditions to which OAKSIM can be applied is discussed, and a numerical example is used to demonstrate computer output generated by the simulator.S3.

User's Guide to OAKSIM
User's Guide to OAKSIM

Author: Donald E. Hilt

Publisher:

Published: 1985

Total Pages: 28

ISBN-13:

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Met dit computerprogramma kunnen groei- en opbrengstprojecties worden opgesteld voor verschillende dunningsmogelijkheden tot zo'n 50 jaar

Test of Four Stand Growth Simulators for the Northeastern United States
Test of Four Stand Growth Simulators for the Northeastern United States

Author: Thomas M. Schuler

Publisher:

Published: 1993

Total Pages: 20

ISBN-13:

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SILVAH, FIBER, NE-TWIGS, and OAKSIM simulators, commonly used in the northeastern United States, were evaluated by comparing predicted stand development with actual stand development records for periods ranging from 15 to 50 years. Results varied with stand parameter, forest type, projection length, and geographic area. Except in the spruce-fir forest type where FIBER stands out as the best simulator, no single simulator is clearly superior to the others for all locations within a forest type. In general, FIBER, NE-TWIGS, and SILVAH performed best in the northern hardwood (beech- birch-maple) forest type; NE-TWIGS and SILVAH performed best in the Allegheny hardwood (cherry-maple) forest type; SILVAH and OAKSIM performed best in the oak- hickory forest type; and SILVAH was most suitable in the transition hardwood (mixture of northern hardwoods and oaks) forest type. The results give growth and yield model users more information for selecting the simulator most suitable for their particular needs. The results also can be used as a diagnostic tool for growth and yield model development.

West Virginia Yellow-poplar Lumber Defect Database
West Virginia Yellow-poplar Lumber Defect Database

Author: Lawrence E. Osborn

Publisher:

Published: 1992

Total Pages: 688

ISBN-13:

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S2In West Virginia, yellow-poplar (Liriodendron tulipifera) is abundant and is a prime candidate for increased utilization in a variety of manufacturing industries. Computer simulations are a cost-effective tool for estimating potential cutting yields from lumber. They can be used to promote increased use of yellow-poplar in the furniture, cabinet, and architectural woodworking industries and may also lead to increased utilization of the lower grades of lumber. This paper describes the data collection methods and the format of the new West Virginia yellow-poplar lumber defect database that was developed for use with computer simulation programs. The database contains descriptions of 627 boards, totaling approximately 3,800 board feet, collected in West Virginia for grades FAS, FASIF, No. 1 Common, No. 2A Common, and No. 28 Common.S3.