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This field guide insert presents the growth intercept models and tables available for use in the interior of British Columbia. Included are growth intercept models and tables for: Species - Code - Reference - Revised Lodgepole Pine - Pli - Nigh (1997) - Oct. 1999 Interior Spruce - Sx - Nigh (1999) - Oct. 1999 Douglas-fir - Fdi - Nigh (1997) - Oct. 1999 Western Hemlock - Hw - Nigh (1997) - Oct. 1999 Subalpine Fir - Bl - Thrower (1997) - Oct. 1999 Western Redcedar - Cw - Nigh (1999) - Oct. 1999 Western Larch - Lw - Nigh et al. (1999) - Oct. 1999 The Options section notes any options and alternative models or model formulations, and provides references that are available from the above address. The tables are designed for rough estimation of site index in the field. The formulation or the appropriate publication should be consulted for accurate site index determination. The arbitrary range of site index in the tables is 5-40 m. The tables are in a common format for consistency among species and do not necessarily represent the range of site indices found in the model development data. Site index is based on top height and a reference age of 50 years (breast height) for all species. Estimates of growth intercept and site index that are beyond the range of the data used in the analyses (given in the Notes section for each species) should be interpreted with caution. The tables presented in this handbook do not have sufficient resolution, particularly at young ages, to be used in silviculture surveys. Silviculture surveyors, and others who need to estimate site index during a silviculture survey or a reconnaissance, should consult the appropriate field guide for silviculture surveys (B.C. Min. For. 1995. Growth intercept method for silviculture surveys. Forest Practices Br., Victoria, B.C.). As well, information about the application of the models can be obtained from the source reports. Growth intercept models and tables will be refined and updated as new information becomes available. A revised reference list will be issued with each addition or revision. Write to the above address for updates.
Nigh, G.D.. 1999. Growth intercept models and tables for British Columbia - interior species: third edition. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Field Guide Insert (FLNRORD). FGI10
Topic: FLNRORD Research Program
Keywords: Growth, Yield
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