Pacific Southwest Research Station

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Research Note

Title: Estimating past diameters of ponderosa pine in northern California

Author: Powers, Robert F.

Date: 1969

Source: Res. Note PSW-RN-194. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

Station ID: RN-PSW-194

Description: Past outside bark diameters (d.o.b.) of ponderosa pine in northern California can be estimated from the relation of bark thickness to stem diameter. An equation for estimating past d.o.b.'s has been developed. The relationship appears to be linear between 1 and 20 inches d.o.b. and differs from ratios reported for the species in other areas. Site quality and crown class did not seem to affect the relationship.

Keywords: tree diameter measurements, past diameters, Pinus ponderosa, California

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Citation

Powers, Robert F.   1969.  Estimating past diameters of ponderosa pine in northern California.   Res. Note PSW-RN-194. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p.