| Calibration and Modification for the Pacific Northwest of the New Zealand Douglas-Fir Silvicultural Growth Model Contributor(s): United States Department of Agriculture (Author) |
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ISBN: 1508756503 ISBN-13: 9781508756507 Publisher: Createspace Independent Publishing Platform OUR PRICE: $15.19 Product Type: Paperback Published: June 2015 |
| Additional Information |
| BISAC Categories: - Reference |
| Physical Information: 0.1" H x 8.5" W x 11.02" (0.31 lbs) 50 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: This paper describes a growth model for young plantations of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) growing in the Pacific Northwest. The overall model has three major components. The first is a yield model for diameter and height distributions describing stands prior to pruning or precommercial thinning. The second component is an annual per-acre net increment model adapted from a recent model for Douglas-fir plantations in New Zealand; thinning and pruning are features of the model. The third component is growth equations for cohorts of individual trees; the results from this component are adjusted to match those from the second component. Fitting data are from Stand Management Cooperative experiments, with top heights generally below 75 ft. An intended use of the model is the evaluation of pruning regimes, in conjunction with the ORGANON model for growth at older ages, and TREEVAL model for clear-wood recovery and economic evaluation. |