Effects of stratification and temperature on seed germination speed and uniformity in central Oregon ponderosa pine (Pinus ponderosa Dougl. ex Laws.)
By: John C. Weber and Frank C. Sorensen.
Contributors: Sorensen, Frank C.; Pacific Northwest Research Station (Portland, Ore.)
Series: Research paper PNW-RP -- 429
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
Published: 1990
Place of publication: [Portland, Or.]
Language: eng
Format: Microform
Number of pages: 13
Subjects: Germination; Ponderosa pine -- Oregon -- Growth
Notes: Cover title.

Bibliography: p. 10-11.

Microfilm. [Washington : U.S. SUPTDOCS/GPO, 1990] 1  microfiche.