Effect of date of cone collection and stratification period on germination and growth of Douglas-fir seeds and seedlings
By: by Frank C. Sorensen
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.); United States. Forest Service
Series: USDA Forest Service research note PNW ; 346
Publisher: Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Published: 1980
Place of publication: Portland, Or
Language: eng
Number of pages: 11
Subjects: Douglas fir; Germination
Notes: Issued Feb. 1980

Bibliography: p. 10-11