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Growth

Tree growth and stand yield may be described by yield tables and growth models. Site index and class are important to determine because growth and yield depend on site.

CACTOS stands for the California Conifer Timber Output Simulator. CRYPTOS is a growth simulator for the redwood and coastal Douglas-fir region. Both programs were developed by a cooperative of redwood landowners (including JDSF) at the University of California, Berkeley. For more information on CACTOS and CRYPTOS, please visit UC Berkeley Emeritus Professor, Lee C. Wensel's website.

For Site Index reports on the various California forest types, click here.

Yield Tables | Growth Simulators | CACTOS | CRYPTOS

Yield Tables

Title	Author	Publisher	File Type	Size
Illustrative Yield Tables for Coastal Conifers in California	Krumland, B. and Wensel, L.	Co-op Redwood Yield Research Project–U.C. Berkeley No. 18 1980	PDF	860 K
Variable Density Yield Equations for Natural Stands of Coastal Conifers	Krumland, B. and Wensel, L.	Co-op Redwood Yield Research Project–U.C. Berkeley No. 7 1977	PDF	398 K
The Yield of Douglas fir in the Pacific Northwest	McArdle, R., Meyer, W., Bruce, D.	USDA Technical Bulletin 201, 1961	PDF	3.36 MB
Yield, Stand and Volume Tables for Douglas Fir in California	Schumacher, F.	UC Berkeley Ag. Exp. Sta. Bull. 491, 1930	PDF	1.7 MB
Yield of Even-Aged Stands of Ponderosa Pine	Meyer, W.	USDA Forest Service, PSW Tech. Bull. 630, 1961	PDF	2.90 MB
Preliminary Yield Tables for Second-Growth Stands in the California Pine Region	Dunning, D. and Reineke, L.	USDA Technical Bulletin 354, 1933	PDF	1.04 MB
Empirical Yield Tables for Young-Growth Redwood	Lindquist, J. and Palley, M.	UC Berkeley Ag. Exp. Sta. Bull. 796, 1963	PDF	1.92 MB
Yield, Stand and Volume Tables for White Fir in the California Pine Region	Schumacher, F.	UC Berkeley Ag. Exp. Sta. Bull. 407, 1926	PDF	1.08 MB

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Growth Simulators

Growth simulation systems are computer programs that predict forest growth. Inventory data is usually input to the simulator although some software will generate data from summary information. Growth models may predict either individual tree or whole stand growth. Many simulators also predict background mortality. The links below are to free growth simulation programs for California or neighboring areas. We also provide information for the CACTOS (mixed conifer) and CRYPTOS (redwood/Douglas-fir) systems.

Forest Vegetation Simulators

Organon Individual Tree Growth Model

Ecology and Management of Western Forests Influenced by Mediterranean Climate, Conifers

CalPro: A Spreadsheet Program for the Management of California Mixed-Conifer Stands
(PDF, 1.70 MB)

Predicting Multi-Aged Coast Redwood Stand Growth and Yield Using Leaf Area Allocation
(DOC, 251 KB)

Redwood Multi-Aged Stocking Assessment Model (MASAM) Model
(XLS, 52.5 KB)

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California Conifer Timber Output Simulator (CACTOS)

No.	Date	Author	Title	Size	Pages
		Wensel, Lee, et al.	CACTOS User's guide: The California conifer timber output simulator	7.02 MB	96
2	7/15/1981	Biging, Greg	Volume tables for young-growth mixed conifers of Northern California	1.6 MB	54
1	11/1/1981	Filion, Robin, et al.	Posting of the increment borer for accurate basal area growth determination	620 K	15
4	3/24/1982	Wensel, Lee	The coop yield model: Background and architecture	129 K	6
3	7/15/1982	Biging, Greg, et al.	A photographic technique for use with stem analysis	525 K	25
5	3/23/1983	Koehler, James, et al.	Summary of the coop's database	395 K	16
6	9/1/1983	Biging, Greg	Stem analysis procedures for use in obtaining time series forest growth data	1.44 MB	46
7	11/1/1983	Biging, Greg	Volume tables for young-growth mixed conifers for Northern California based upon the stem analysis data	1.59 MB	60
9	6/1/1984	Van Deusen, Paul, et al.	Crown volume and dimensional models for mixed conifers of the Sierra Nevada	251 K	15
8	7/8/1984	Biging, Greg, et al.	Site index equations for young-growth mixed conifers of Northern California	345 K	14
11	4/15/1985	Van Deusen, Paul, et al.	A stand generator for mixed species stands	2.23 MB	28
12	4/15/1985	Wensel, Lee, et al.	A tree growth projection system for Northern California coniferous forests	806 K	34
13	6/30/1985	Wensel, Lee, et al.	Forest growth and yield research by the Northern California Forest Yield Cooperative 1978-1985	3.46 MB	43
14	1/7/1986	Koehler, James, et al.	The use of pseudo-stochastic effects in a tree growth system	456 K	19
17	2/13/1987	Meerschaert, et al.	Compare users guide: A computer program for camparing actual growth with CACTOS/CRYPTOS predictions version 2.0	180 K	8
18	2/13/1987	Daugherty, Peter, et al.	YDAVG User's guide: The CACTOS yield file averager version 2.0	265 K	12
19	2/13/1987	Meerschaert, et al.	SDAVG User's guide: The CACTOS stand description averager version 2.0	102 K	4
55	10/1/1987	Wensel, Lee, et al.	Tree height and diameter growth models for Northern California conifers	773 K	21
20	11/19/1987	Meerschaert, et al.	Entry user's guide version 2.0 the CACTOS/CRYPTOS stand description entry and edit program	349 K	14
21	11/23/1987	Biging, Greg, et al.	STAG user's guide: The forest stand generator for mixed conifer species in California	978 K	39
24	1/12/1989	Biging, Greg, et al.	Individual tree mortality models for Northern California mixed conifer species	272 K	11
26	1/12/1989	Biging, Greg, et al.	Soil and environment factors as predictors of cubic volume growth in California mixed conifer stands	396 K	13
23	1/27/1989	Wensel, Lee, et al.	Revised parameter estimates for CACTOS growth models	450 K	15
25	3/20/1989	Meerschaert, et al.	INCA user's guide: the inventory to CACTOS conversion program	300 K	12
28	12/16/1989	Robards, Timothy, et al.	A change in the height-to-crown base model for six conifer species of the California mixed conifer region	271 K	10
31	6/19/1990	Wensel, Lee, et al.	Sources of bias in diameter growth data	108 K	4
29	8/13/1990	Swartz, Pamela, et al.	Permcheck: A pemanent plot data checking program version 2.0	877 K	39
22	9/13/1990	Meerschaert, et al.	CACTOS (version 4.2): Batch command file generator	274 K	9
30	8/28/1991	Biging, Greg, et al.	The predictive models and procedures used in the forest stand generator (STAG)	1.09 MB	43
34	9/16/1991	Biging, Greg, et al.	The forest stand generator (STAG) user's guide	1.12 MB	51
32	1/16/1992	Wensel, Lee, et al.	Bark taper models for California conifers	703 K	30
33	1/16/1992	Wensel, Lee, et al.	Tree taper models for major commercial California conifers	775 K	28
35	2/27/1992	Turnblom, Eric, et al.	PCBRIDGE: A data reformatting utility for bridging PERMCHECK files for CACTOS stand description files	249 K	8
36	9/23/1992	Turnblom, Eric, et al.	Computing the components of forest growth and the revisions for CACTOS version 4.5	616 K	19
40	2/18/1994	Wensel, Lee, et al.	A comparison of CACTOS short-term growth projections with observed growth	256 K	8
41	10/8/1997	Wensel, Lee	Missing site-index for one or more species on the plot	135 K	4
42	8/17/1999	Yeh, Hui-yi, et al.	Revised parameter estimates for CACTOS growth models	265 K	6

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CRYPTOS

No.	Date	Author	Title	Size	Pages
			Redwood yield research cooperative data set documentation growth plots	1.02 MB	56
1	12/11/1975	Krumland, Bruce, et al.	Preliminary young growth volume tables for coastal California conifers	721 K	18
2	11/15/1976	Krumland, Bruce, et al.	Evaluation of Douglas-fir site index curves for the north coastal region of California	349 K	9
6	1/1/1977	Krumland, Bruce, et al.	Individual tree mortality models for the north coast region of California	366 K	7
3	3/31/1977	Krumland, Bruce, et al.	Young growth volume tables for coastal California conifers	772 K	19
5	6/5/1977	Krumland, Bruce, et al.	Procedures for estimating redwood and Douglas-fir site indexes in the north coastal region of California	839 K	12
4	6/6/1977	Krumland, Bruce, et al.	Height growth patterns and fifty year base age site index curves for young growth coastal redwood	1.06 MB	14
7	10/1/1977	Krumland, Bruce, et al.	Variable density yield equations for natural stands of coastal conifers	381 K	11
8	1/1/1978	Krumland, Bruce, et al.	Generalized height diameter equations for coastal conifers	265 K	10
9	11/1/1978	Krumland, Bruce, et al.	Volume and taper relationships for redwood, Douglas-fir, and other conifers in the north coast of California	2.39 MB	67
13	3/29/1979	Krumland, Bruce, et al.	A collection of some red alder and tanoak volume equations	309 K	6
10	4/30/1979	Krumland, Bruce, et al.	Conversions for the site index systems used in the north coast of California	137 K	2
12	4/30/1979	Krumland, Bruce, et al.	Generalized height diameter curves for red alder and tanoak	154 K	4
11	4/30/1979	Krumland, Bruce, et al.	Diameter distribution models for coastal stands in California	1.41 MB	32
14	6/1/1980	Krumland, Bruce, et al.	Concepts, designs, and uses of coastal growth models	274 K	9
16	9/1/1980	Krumland, Bruce, et al.	CRYPTOS (I)–User's Guide Cooperative Redwood Yield Project Timber Output Simulator–Interactive program	511 K	18
17	9/1/1980	Krumland, Bruce, et al.	Users guide to GENR	284 K	12
18	9/1/1980	Krumland, Bruce, et al.	Illustrative yield tables for coastal conifers in California	871 K	26
15	1/1/1981	Krumland, Bruce, et al.	A tree increment model system for north coastal California	1.74 MB	59
	6/1/1982	Standiford, Richard	What's happening in California forestry	1.04 MB	37
19	8/10/1982	Krumland, Bruce, et al.	Annoucement of release for CRYPTOS Cooperative Redwood Yield Project Output Simulators–Interactive program	52 K	1
20	9/1/1982	Krumland, Bruce, et al.	CRYPTOS/CRYPT2 User's guide	731 K	27
21	9/25/1982	Krumland, Bruce, et al.	CRYPTOS stand table entry program	156 K	5
	1/1/1987	Wensel, Lee, et al.	CRYPTOS User's guide: Cooperative redwood yield project timber output simulator	6.53 MB	97

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