Document Type
Thesis
Date of Degree Completion
Summer 1974
Degree Name
Master of Education (MEd)
Department
Biology
Committee Chair
W. Barker
Second Committee Member
Curt A. Wiberg
Third Committee Member
Daryl D. Basler
Abstract
This paper presents a study designed to determine how well tree ring-widths in Pinus ponderosa and Pseudotsuga menziesii indicate the past annual precipitation in the area of the Rimrock-Tieton Dam, Yakima County, Washington. The study was based on ten trees sampled from a small homogeneous site selected for apparent dryness. A Swedish increment bore was used to extract four cores from each tree. The cores were mounted, dated, measured, and standardized. Linear regression and correlations were used to analyze the data. The results revealed that Pseudotsuga menziesii ring widths are slightly better indicators of the annual precipitation than the ring-widths of Pinus ponderosa.
Recommended Citation
Bliss, Gerald L., "Tree Ring-Widths in Pinus Ponderosa and Pseudotsuga Menziesii as Indicators of Past Annual Precipitation" (1974). All Master's Theses. 2197.
https://digitalcommons.cwu.edu/etd/2197
Comments
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