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Practical Improvements For Pivot And Surface Irrigation, Jonathan A. Holt
Practical Improvements For Pivot And Surface Irrigation, Jonathan A. Holt
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Irrigation is critical to meeting global food and fiber demands. Optimizing agricultural irrigation may help sustain production levels, while reducing its demand for water. This research evaluated precision sprinklers and drip irrigation for pivots, five pivot track mitigation tools, three scientific irrigation scheduling (SIS) methods, sensors for surface irrigation cutoff, and automating surface systems to implement surge irrigation. With pivots and surface irrigation being the most common methods for irrigation in the West, small improvements from these tools could result in significant water savings.
Low energy precision application (LEPA) sprinklers and mobile drip irrigation (MDI) were tested on two pivots. …
The Influence Of Collective Action And Policy In The Development Of Local Food Systems, Lori Porreca
The Influence Of Collective Action And Policy In The Development Of Local Food Systems, Lori Porreca
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The modern global agrifood system has had significant negative impacts on consumers and producers. This has precipitated the rise of local food systems that are purported to improve the health and livelihoods of consumers and producers. High expectations have led to significant public and private resources dedicated to the development of local food systems. Despite this, there has been little systematic research exploring the social and institutional conditions that facilitate or frustrate local food system development.
Using a comparative case study approach, this study explored the ways local structural conditions, collective action, food system policies, and the political context affect …
Evapotranspiration Of Kentucky Bluegrass, Lynda L. Fenton
Evapotranspiration Of Kentucky Bluegrass, Lynda L. Fenton
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Rapid population growth in arid regions of the western US is placing increased demand on water resources. Variability in precipitation and common occurrence of drought have promoted scrutiny of water use in urban lawns and gardens. However, few reliable measurements of water use of these landscapes exist. Quantifying the amount of water used vs. required by landscapes such as turfgrass would allow significant water conservation. Evapotranspiration (ET) is affected by biophysical factors such as: available energy, turbulent mixing, saturation deficit, soil water, and stomatal conductance. In order to simulate the water use by turfgrass, the relative importance of these processes …
Evaluation Of Competition Between Turfgrass And Trees In The Landscape, Christopher A. Hendrickson
Evaluation Of Competition Between Turfgrass And Trees In The Landscape, Christopher A. Hendrickson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Population growth in regions of the Intermountain West has resulted in rapid growth of residential neighborhoods. In Utah, the landscapes associated with these expanding neighborhoods consume vast quantities of treated water. This is a concern in all states of the Intermountain West, as water becomes increasingly scarce. Traditionally used turfgrasses, trees and other plants in Intermountain West landscapes require significant amounts of supplemental water considering the intense sunlight, dry winds and sparse rainfall typical of the region. Characterizing the interactions between turfgrass and tree species in these landscapes can aid in the identification of candidate species that consume less nutritional …
Origins Of The Y Genome In Elymus, Pungu Okito
Origins Of The Y Genome In Elymus, Pungu Okito
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Triticeae tribe DUMORTER in the grass family (Poaceae) includes the most important cereal crops such as wheat, barley, and rye. They are also economically important forage grasses. Elymus is the largest and most complex genus with approximately 150 species occurring worldwide. Asia is an important centre for the origin and diversity of perennial species in the Triticeae tribe, and more than half of the Elymus are known to occur in the Asia. Cytologically, Elymus species have a genomic formula of StH, StP, StY, StStY, StHY, StPY, and StWY. About 40% of Elymus …
Simulated Browsing Impacts On Aspen Suckers' Density, Growth, And Nutritional Responses, Koketso Tshireletso
Simulated Browsing Impacts On Aspen Suckers' Density, Growth, And Nutritional Responses, Koketso Tshireletso
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Heavy and repeated ungulate browsing on reproductive suckers has limited trembling aspen (Populus tremuloides Michx.) regeneration on many Western landscapes. However, little is known about the specific effects of season and intensity of browsing. My objectives were to determine the effects of season and intensity of clipping (simulated browsing) on suckers’ (1) density and growth characteristics, and (2) nutritional quality and quantity.
Three randomly selected stands were clear-felled in mid-July, 2005, and fenced. Simulated browsing treatments of 0%, 20%, 40%, and 60% removal of current year’s growth were randomly applied in early, mid-, and late summers of 2006 and …