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Browsing Extension Service -- Circulars / Extension Circulars by Author "Campbell, Allan, 1936-"

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Browsing Extension Service -- Circulars / Extension Circulars by Author "Campbell, Allan, 1936-"

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  • Oregon State University. Extension Service; Campbell, Allan, 1936- ([Corvallis, Or.] : Oregon State University, Extension Service, 1999-02)
    Three principal types of abiotic injury affect forests and woodlands in Oregon: injury related to weather, to soil, and to human activity. Abiotic injuries, also called abiotic diseases, can be found wherever forests ...
  • Oregon State University. Extension Service; Oester, Paul T.; Fitzgerald, Stephen Arthur; Emmingham, William H.; Campbell, Allan, 1936-; Filip, Gregory M. (Corvallis, Or. : Extension Service, Oregon State University, 1992-11)
  • Oregon State University. Extension Service; Campbell, Allan, 1936-; Kanaskie, Alan; Overhulsler, Dave ([Corvallis, Or.] : Oregon State University, Extension Service, 1988)
    The purpose of this publication is to introduce you to the world of forest protection by: (1) providing you with broad definitions of the five principal groups of destructive agents; and (2) presenting some information ...
  • Oregon State University. Extension Service; Elwood, Norman E.; Bowers, S. (Steven Clay); Campbell, Allan, 1936-; Clements, Steve; Duddles, Ralph; Fitzgerald, Stephen; Fletcher, Rick; Garland, John; Kavanagh, Katy; Kramer, Mari J.; Oester, Paul (Corvallis, Or. : Extension Service, Oregon State University, 1997-08)

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