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Articles 1 - 16 of 16
Full-Text Articles in Entire DC Network
Effects Of Elevated Co2 On Crop Growth Rates, Radiation Absorption, Canopy Quantum Yield, Canopy Carbon Use Efficiency, And Root Respiration Of Wheat, Oscar A. Monje
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Wheat canopies were grown at either 330 or 1200 μmol mol-1 CO2 in sealed controlled environments, where carbon fluxes and radiation interception were continuously and nondestructively measured during their life cycles. The effects of elevated CO2 on daily growth rates, canopy quantum yield, canopy and root carbon use efficiencies, and final dry mass were calculated from carbon flux measurements in an open gas exchange system. Dry biomass at harvest was predicted from the gas exchange data to within ± 8%. The greatest effect of elevated CO2 occurred in the first 15d after emergence; however, several physiological …
Effect Of Salinity (Nacl) On Germination, Growth, Ion Accumulation, And Protein Synthesis In Alfalfa (Medicago Sativa L.), Thamir S. Al-Niemi
Effect Of Salinity (Nacl) On Germination, Growth, Ion Accumulation, And Protein Synthesis In Alfalfa (Medicago Sativa L.), Thamir S. Al-Niemi
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
To study the effect of NaCl stress on gene expression in alfalfa (Medicago sativa L.), greenhouse and laboratory experiments were conducted with 22 cultivars during germination and post-germination growth. The ability of alfalfa cultivars to germinate at the different NaCl concentrations was not related to their postgermination performance (salt tolerance) under those conditions.
Genetic effects were evident for Na and Cl ion uptake and accumulation in alfalfa shoots and roots. The strategies of alfalfa cultivars to cope with NaCl stress includes exclusion of Na from shoots and Cl from roots or from the whole plant depending on cultivar and …
Influence Of Microphytic Crusts On Selected Soil Physical And Hydrologic Properties In The Hartnet Draw, Capitol Reef National Park, Utah., John Dana Williams
Influence Of Microphytic Crusts On Selected Soil Physical And Hydrologic Properties In The Hartnet Draw, Capitol Reef National Park, Utah., John Dana Williams
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Microphytic crust influences on selected physical and hydrologic soil properties were examined at one location in Capitol Reef National Park, Utah. Designed experiments were conducted in a sandy loam soil where microphytic crusts were present without the concomitant development of confounding physical or chemical soil conditions. Three treatments were used for all experiments: control, chemically killed (microphytes killed but left in place), and scalped (microphytic crusts mechanically removed).
A portable wind tunnel was used to deter-nine if microphytic crusts contribute to soil stability and reduce the erosive effect of wind. Significantly lower threshold friction velocity and greater wind-entrained material were …
Competitive Interaction Between Crested Wheatgrasses And Cheatgrass, Mark G. Francis
Competitive Interaction Between Crested Wheatgrasses And Cheatgrass, Mark G. Francis
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Current revegetation practices in the lntermountain West include the use of Nordan (Agropyron desertorum) and Hycrest (A. cristatum x desertorum) crested wheatgrass on rangeland susceptible to cheatgrass (Bromus tectorum) invasion, although little quantitative data exists that compares their competitive abilities. We evaluated both the competitive ability of Hycrest and Nordan in two-species mixtures with cheatgrass, and evaluated seedling establishment characteristics for all three species in a greenhouse study. Linear and nonlinear models were developed for a range of densities for each species to predict median above-ground biomass and tiller numbers. In both experiments, increasing …
Effects Of Water Stress Preconditioning On Plant Water Relations And Transplant Survival Of Artemisia Cana And Agropyron Intermedium, Jerriann Ernstsen
Effects Of Water Stress Preconditioning On Plant Water Relations And Transplant Survival Of Artemisia Cana And Agropyron Intermedium, Jerriann Ernstsen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Typically, dormant seedlings are transplanted when revegetating nonirrigated disturbed lands in order to prevent transplant shock triggered by water stress. Since dormant seedlings have to be used, this limits the duration of the transplant season. It may be possible to increase this limited season by inducing acclimation responses that would increase drought tolerance. Preconditioning actively growing seedlings to water stress prior to transplanting could induce acclimation responses such as solute accumulation and/or stomatal modulation.
Under greenhouse conditions, A. cana and A. intermedium seedlings were subjected to three water stress preconditioning treatments: a well watered control, one dry-down cycle, and three …
Important Pests Of Ornamental Aspen, F. A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson
Important Pests Of Ornamental Aspen, F. A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson
All Archived Publications
No abstract provided.
Sodic Soils Are Occurring More Frequently In Utah. How Should They Be Managed?, D. W. James
Sodic Soils Are Occurring More Frequently In Utah. How Should They Be Managed?, D. W. James
All Archived Publications
No abstract provided.
Diagnostic Testing For Nitrogen Soil Fertility, D. W. James
Diagnostic Testing For Nitrogen Soil Fertility, D. W. James
All Archived Publications
No abstract provided.
Utah Fertilizer Guide, D. W. James, K. F. Topper
Utah Fertilizer Guide, D. W. James, K. F. Topper
All Archived Publications
No abstract provided.
The Russian Wheat Aphid In Utah, Jay B. Karren
The Russian Wheat Aphid In Utah, Jay B. Karren
All Archived Publications
No abstract provided.
Pea Aphid Outbreaks Associated With Spraying For The Alfalfa Weevil In Utah, Ted Evans, Jay B. Karren, Clyde Hurst
Pea Aphid Outbreaks Associated With Spraying For The Alfalfa Weevil In Utah, Ted Evans, Jay B. Karren, Clyde Hurst
All Archived Publications
No abstract provided.
Ash/Lilac Borer, Jay B. Karren
What Are The Indirect Costs Of Pesticide Use?, Ted Evans
What Are The Indirect Costs Of Pesticide Use?, Ted Evans
All Archived Publications
No abstract provided.
Cereal Leaf Beetle, Jay B. Karren
Assassin Bug, Alan H. Roe
Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson
Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson
Aspen Bibliography
No abstract provided.