Ministry of Forests Forest Science Program
		Abstract for Field Guide Insert 09

		GROWTH INTERCEPT MODELS AND TABLES FOR BRITISH COLUMBIA - COASTAL SPECIES
		Author or Ministry Contact: Gordon D. Nigh
		Branch: Research
		Subject: Growth and Yield
		Series: Field Guide Insert
		Other details: Published 1997, Revised Oct. 1999.

Abstract

This field guide insert presents the growth intercept models and tables available for use in coastal regions of British Columbia. Included are growth intercept models and tables for:

 

Species	Code	Reference	Revised
Western Hemlock	Hw	Nigh (1996)	Oct. 1997
Sitka Spruce	Ss	Nigh (1996)	Oct. 1997
Douglas-fir	Fd	Nigh (1997)	Oct. 1997

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 10-50 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.

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