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Filtering by: Creator Cowling, Ellis Brevier, 1932- Decade 1980-1989

Pathological and ecological aspects of decline and mortality of Chamaecyparis nootkatensis in southeast Alaska

Creator:

Hennon, Paul Edward

Abstract:

Alaska-cedar (Chamaecvparis nootkatensIs (D. Don) Spach) is a valuable tree that is suffering from a serious decline and mortality of unknown cause throughout southeast Alaska. Epidemiological and pathological studies were initiated to determine if a pathogen is the primary cause of this problem. By examining old aerial photographs and by...

Resource Type:

Dissertation

Full Text:

. Ecology 63:1932-1948. American Forestry Association. 1955. These are the champs. Amer. For. 61(9):31-40
Effect of defoliation treatments on forage quality, quantity, and species composition of a Lolium perenne (L.) - Trifolium subterraneum (L.) pasture

Creator:

Motazedian, Iraj

Abstract:

As part of investigations to adapt a suitable grazing system in western Oregon, this research was designed to monitor the effects of defoliation treatments on dry matter production, forage quality, regrowth after defoliation, and species composition of a Lolium perenne Trifolium subterraneum pasture for three consecutive growing seasons from 1980...

Resource Type:

Dissertation

Full Text:

. Cowling and Locker (1970) found that ryegrass had a positive linear response to N fertilizer up to 330 kg