Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Ammonia oxidizers (1)
- Apple (1)
- Competition (1)
- Compost (1)
- Cover crops (1)
-
- Cropping systems (1)
- Ecotypes (1)
- Forage Kochia (1)
- Functional gene (1)
- Gardner's Saltbush (1)
- Grafting (1)
- Halogeton (1)
- Hydroponic (1)
- Intraspecific variation (1)
- Mulches (1)
- Nitrification (1)
- Organic (1)
- Plant Growth Regulators (1)
- Quinoa (1)
- Restoration (1)
- Rootstock (1)
- Salt tolerance (1)
- Scion (1)
- Seedling (1)
- Selenate uptake (1)
- Soil health (1)
- Soil nutrient management (1)
- Soil quality (1)
- Symphotrichum ascendens (1)
- Urease (1)
Articles 1 - 9 of 9
Full-Text Articles in Entire DC Network
The Effects Of Rootstock, Scion, Grafting Method And Plant Growth Regulators On Flexural Strength And Hydraulic Resistance Of Apple, Stuart W. Adams
The Effects Of Rootstock, Scion, Grafting Method And Plant Growth Regulators On Flexural Strength And Hydraulic Resistance Of Apple, Stuart W. Adams
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The apple rootstock ‘Geneva® 41’ (‘G.41’), is desirable for its resistance to fire blight, Erwinia amylovora, while producing high yields. However, ‘G.41’ and other Geneva® selections tend to form weak graft unions in the nursery that are susceptible to breaking in the wind, at harvest, or during shipment. In order to understand and remedy this graft union weakness, six scions (‘Fuji’, ‘Gala’, ‘Honeycrisp’, ‘McIntosh’, ‘Pink Lady’, and ‘Scilate’) by seven rootstocks (‘G.41’, ‘G.935’, ‘G.214’, ‘G.11’, ‘M.9-NIC 29’, ‘B.9’ and ‘EMLA 26’), by two grafting methods (chip bud and saddle graft) in a factorial design were tested for graft …
Selenate Uptake By Symphyotrichum Ascendens Western Aster, Nathan Hankes
Selenate Uptake By Symphyotrichum Ascendens Western Aster, Nathan Hankes
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Symphyotrichum ascendens is a native forb species responsible for selenium poisoning of livestock grazing on mine wastes in the American Intermountain West. While S. ascendens has long been assumed to be a Se accumulator species, this report details the first investigation into its Se uptake, affinity, partitioning, and growth in response to selenate fertilization. The study was performed in a hydroponic growth environment at selenate concentrations of 0.1, 0.25, 0.5, and 1.0 mM selenate. Symphyotrichum ascendens absorbed selenate in percentage concentrations, with the highest tissue concentration of 3.6% Se. Symphyotrichum ascendens exhibited signs of stress, producing 69.2% less biomass at …
Increasing The Sustainability Of Utah Farms By Incorporating Quinoa As A Novel Crop And Protecting Soil Health, Kristine R. Buckland
Increasing The Sustainability Of Utah Farms By Incorporating Quinoa As A Novel Crop And Protecting Soil Health, Kristine R. Buckland
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Most of the western United States faces increasing water shortages in the coming years, that will present a major challenge for maintaining sustainable farms. Incorporating an alternative crop that is well adapted to projected changes in climate could be a successful approach to increasing the sustainability of farms in the region. Quinoa, Chenopodium quinoa Willd., may be an ideal alternative crop to meet the demands of the Intermountain West. Before widespread adoption of this novel crop can occur, best management strategies need to be documented. This paper provides research on cropping systems, irrigation rates, and weed competition with quinoa. Additionally, …
Establishment And Trends In Persistence Of Selected Perennial Cool-Season Grasses, Craig W. Rigby
Establishment And Trends In Persistence Of Selected Perennial Cool-Season Grasses, Craig W. Rigby
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The choice of plant materials is an important factor in restoration or revegetation of disturbed rangelands. To better identify plant materials that could be adapted to increased competition from invasive grasses and fluctuations in temperature and precipitation, there is a need to understand potential seedling establishment, plant persistence, and dry-matter yield (DMY) as a measure of plant vigor in the newly developed varieties across a wide range of environmental conditions. Experiments were conducted on four semiarid range sites to compare these traits in 14 perennial cool-season grass species currently used for revegetation in the Western U.S.A. There were location differences, …
Utah Lotus: North American Legume For Possible Use In Rangeland Revegetation In The Southern Great Basin Of The Western United States, Jason M. Stettler
Utah Lotus: North American Legume For Possible Use In Rangeland Revegetation In The Southern Great Basin Of The Western United States, Jason M. Stettler
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This thesis project explored the production and forage quality characteristics of Utah lotus (Lotus utahensis Ottley) and scrub lotus (L. wrightii (A. Gray) Greene) seed collections during a two-year period. The variation of 14 Utah lotus and five scrub lotus seed collections was evaluated by measuring important plant characteristics at three common garden sites in northern Utah. In addition, the genetic structure of the collections was determined by molecular biological techniques. Large variation was observed among collections for all phenotypic traits measured, with Utah lotus and scrub lotus being phenotypically quite different. Two collections of Utah lotus (LU-5 …
Soil Nutrient Cycling And Water Use In Response To Orchard Floor Management In Stone-Fruit Orchards In The Intermountain West, Catherine Mae Culumber
Soil Nutrient Cycling And Water Use In Response To Orchard Floor Management In Stone-Fruit Orchards In The Intermountain West, Catherine Mae Culumber
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
An organic peach orchard trial evaluated the effectiveness of different organic management approaches to enhance soil quality and conserve water without compromise to fruit tree growth and fertility. Two tree-row treatments: ‘straw mulch’ (Triticum aestivum L.) and ‘living mulch’ (Lobularia maritima (L.) Desv.) were tested in combination with two alleyway groundcovers: ‘grass’ (Festuca rubra L. with Lolium perenne L.) and a legume, ‘Birdsfoot trefoil’ (Lotus corniculatus L.). The novel treatments were compared with tillage and weed fabric tree-rows with grass alleyways. After mowing, cuttings from the trefoil alleyway were deposited into tree-rows, which provided additional N …
Agricultural Nitrogen Management Affects Microbial Communities, Enzyme Activities, And Functional Genes For Nitrification And Nitrogen Mineralization, Yang Ouyang
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Improved understanding of nitrogen cycling in agriculture is essential for increasing fertilizer use efficiency and sustainable food production. The availability and mobility of nitrogen are largely determined by the processes of nitrogen mineralization and nitrification. Nitrification is mediated by ammonia oxidizing bacteria, ammonia oxidizing archaea, and nitrite oxidizing bacteria. Our understanding of the controls on the relative activity of these nitrifying organisms in soil is limited. A wide variety of soil microorganisms produce enzymes that mineralize nitrogen from organic matter, but we have limited knowledge about links between enzyme activity and the microbes that work in soil. The main objective …
Salt Tolerance Of Forage Kochia, Gardner's Saltbush, And Halogeton: Studies In Hydroponic Culture, Joseph Sagers
Salt Tolerance Of Forage Kochia, Gardner's Saltbush, And Halogeton: Studies In Hydroponic Culture, Joseph Sagers
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Halogeton (Halogeton glomeratus) is a halophytic, invasive species that displaces Gardner’s saltbush (Atriplex gardneri) on saline rangelands. Forage kochia (Bassia prostrata) is a potential species to rehabilitate these ecosystems. This study compared the salinity tolerance of these species and tall wheatgrass (Thinopyrum ponticum) and alfalfa (Medicago sativa). Plants were evaluated for 28 days in hydroponics where they were maintained at 0, 150, 200, 300, 400, 600, and 800 mM NaCl. Shoot growth and ion accumulation were determined. Alfalfa and tall wheatgrass were severely affected by salt with both species’ shoot …
Intraspecific Variation In The Response Of Elymus Elymoides To Competition From Bromus Tectorum, Rebecca K. Mann
Intraspecific Variation In The Response Of Elymus Elymoides To Competition From Bromus Tectorum, Rebecca K. Mann
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In the western United States, thousands of acres of degraded rangelands are dominated by aggressive invasive species such as cheatgrass (Bromus tectorum), and are seeded by managers with native plants in an attempt to restore species diversity, wildlife habitat, and ecosystem services. There are many options for obtaining seeds of native plants; for instance, they can be collected from the region where restoration is to occur, or they may be purchased through commercial producers. For a given plant species, managers may also select seeds from unique subspecies, cultivars, and populations. Genetic differentiation among these within-species groups can not only affect …