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Creator:: Schumacher, Stacy
Abstract:: Yellow starthistle (Centaurea solstitialis L.) is an introduced Asteraceae that has become established on 10 million acres in the Pacific Northwest and California. This weed functions as an annual or short-lived perennial and depends on seeds for reproduction. Strategies of control that reduce plant fitness or lower seed production or...
Resource Type:: Masters Thesis
Full Text:: plant following four different defoliation treatments in northeastern Oregon 36 6. Seedhead diameter

Creator:: Mayer, Kara Hempy
Abstract:: Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...
Resource Type:: Masters Thesis
Full Text:: -dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation on

Creator:: Osman, Khalid Amir
Abstract:: The effect of defoliation intensity and season on Douglas-fir growth were studied in three replications in the Siuslaw National Forest during 1988-1990. Four intensities of defoliation were applied once in either spring or summer 1988. Stem diameter and canopy area were linearly inversely proportional to the level of defoliation. Defoliation...
Resource Type:: Dissertation
Full Text:: Defoliation. Khalid A. Osman and Steven H. Sharrow Department of Rangeland Resources, Oregon State

Creator:: Oregon State University. Agricultural Experiment Station, Crabtree, Garvin Dudley, Mack, H. J., Baggett, James R., Crowell, H. H., Duncan, Andrew A., and Siemer, Sidney R.
Abstract:: Published January 1966. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Other
Full Text:: fifteenth year of publication of the Oregon Vegetable Digest. In our first issue, Director F. E. Price

Creator:: Taylor, Robert Lynn
Abstract:: This study was initiated to make some preliminary evaluations of the effects of red alder (Alnus rubra, Bong.) leaf fall on stream water quality, particularly water color. Laboratory tests were also conducted to better understand the effects of leaf loading, duration of leaf leaching, and type of leaching on changes...
Resource Type:: Masters Thesis

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