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Creator:: Concannon, Julie Ann
Abstract:: This thesis consists of four chapters. Literature is reviewed in Chapter 1. Chapter 2 describes an addition series experiment to determine the influence of species density and proportion on vegetative and reproductive yield of spring wheat and Lolium multiflorum. Chapter 3 consists of a growth analysis experiment to determine whether...
Resource Type:: Masters Thesis
Full Text:: . Shinozaki and Kira (1956) established a yield-density relationship between reciprocal plant weight and

Creator:: Maxwell, Bruce D.
Abstract:: Salmonberry (Rubus spectabilis) and thimbleberry (Rubus parviflorus) are clonal shrub species common to reforestation sites in the Oregon Coast Range. These species have economic importance, because they reduce conifer seedling growth and survival. A population modeling approach was used to facilitate study of the biology of these species and to...
Resource Type:: Dissertation
Full Text:: (Shinozaki and Kira, 1956; Watkinson, 1980; White, 1980; White and Harper, 1970; Yoda et al., 1963). White

Creator:: Roush, Mary Lynn
Abstract:: Models of weed communities aid in the development of weed management strategies and elucidate the processes and mechanisms that regulate plant populations and communities. A conceptual weed community model was developed to organize key regulatory life-history processes. Specific investigations focused on the processes of plant growth and competition, and relationships...
Resource Type:: Dissertation
Full Text:: -CROP ASSOCIATIONS: INTENSITY OF COMPETITION. M. L. Roush and S.R. Radosevich ABSTRACT Competition

Creator:: Hashem, Abul, 1956-
Resource Type:: Dissertation
Full Text:: ecology and in the success of these studies. I am also thankful to Mr. Tim Brewer and Mrs. Aly M. Ghersa

Creator:: Martinez-Ghersa, Maria Alejandra
Abstract:: Plant form is a compromise between resource gathering, reproduction and the tolerance to physical demands of the abiotic and biotic environment. In an agricultural field in addition to the natural factors causing stress, humans also introduce physical and mechanical stresses, and chemical pesticides into the environment. Many of these factors...
Resource Type:: Dissertation
Full Text:: uttaviolet-B (280-315 nm) radiation on plants grown at 3000 m elevation. J. Am. Soc. Hort. Sci.107: 771-774

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