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    Author(s): Robert M. Echols
    Date: 1972
    Source: Res. Note PSW-RN-273. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (273 B)

    Description

    The suitability of wood for various uses can be determined by synthesizing single growth-ring density curves from accumulated means of wood density classes. Wood density gradients across growth rings were measured in large increment cores from 46-year-old ponderosa pines (Pinus ponderosa Laws.) by using X-rays. Of the 48 trees analyzed, 36 had been thinned 10 years earlier, then fertilized; six had been thinned only; and six were unthinned. Wood density distribution curves for growth rings in all trees were combined to produce a single representative curve for each group of trees. Relative tree values were determined by applying density quality factors to tree volumes.

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    Citation

    Echols, Robert M. 1972. Product suitability of wood...determined by density gradients across growth rings. Res. Note PSW-RN-273. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p

    Keywords

    Pinus ponderosa, wood density, fertilizer response, thinning effects, growth rate, utilization potential

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