Geographic variation in speed of seed germination in central Oregon ponderosa pine (Pinus ponderosa Dougl. ex Laws.)
By: John C. Weber and Frank C. Sorensen
Contributors: Pacific Northwest Research Station (Portland, Or.)
Series: Research paper PNW-RP -- 444; Research paper PNW -- 444
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [1992]
Published: 1992
Place of publication: Portland, Or
Language: eng
Number of pages: 12
Subjects: Ponderosa pine -- Oregon; Germination
Notes: Cover title

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Includes bibliographical references (p. 10-12)

Microfiche. [Washington, D.C.?] : Supt. of Docs., U.S. G.P.O., [1992] 1 microfiche : negative