Theses and Dissertations - Department of Soil & Crop Sciences
Recent Submissions
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Soil textural control over decomposition and soil organic matter dynamics
Soil texture is an important factor that influences litter decomposition and soil organic matter (SOM) dynamics, but few experiments have addressed specific mechanisms. Even less work has been done to answer the question ... -
Feeding the soil to feed the planet: soil health outcomes from novel amendments to residue management
Healthy soils are the foundation for the continued capacity of agricultural lands to supply essential ecosystem services while also meeting demands for food, fuel and fiber. From academia to policymakers and other key ... -
Roles of residue management, microbes and aggregation in soil carbon stabilization under semiarid, irrigated corn
With atmospheric carbon dioxide levels continuously on the rise, it is critical that we focus our efforts on sequestering carbon (C) to slow global warming. To maximize these efforts, it is furthermore important to understand ... -
Breeding hard winter wheat (Triticum aestivum L.) for high grain yield and high grain protein concentration
High grain yield (GY) is the primary selection target in commercial hard winter wheat (Triticum aestivum L.) breeding programs, with milling and bread-making quality as important secondary selection targets. Grain protein ... -
Identifying grass-legume bicultures to increase above and belowground biomass production and improve traditional fallows in crop rotations of the Andean Highlands
In the high Andes of Peru, intensification of crop rotation and agricultural land-use is reducing the practice and duration of traditional fallow (based on natural establishment of native vegetation). These fallows represent ... -
Whole is greater than the sum of the parts: piecing together microbial methylated amine metabolism, The
To view the abstract, please see the full text of the document. -
Characterization and quantitative trait loci (QTL) analysis for wheat stem sawfly (Hymenoptera: Cephidae) resistance in winter wheat
The wheat stem sawfly (Cephus cinctus) (WSS) has quickly become a major pest of Colorado wheat production over the past ten years. Prior resistant cultivars have relied on the expression of a solid-stemmed trait (Qss.msub-3BL) ... -
Soil phosphorus availability and transformations following biosolids applications
Land application of biosolids has many benefits such as providing nutrients for plant growth as well as adding organic matter to soil. However, there is the potential for negative impacts due to the high concentration of ... -
Soil organic matter as a nitrogen source for Brassica napus
Decreasing nitrogen (N) fertilizer losses from agricultural systems is a major focus in sustainable agriculture research. Most research to date has focused on reducing and managing N fertilizer additions in time and space. ... -
Characterization and molecular mapping of stripe rust resistance in a Denali/Hatcher winter wheat doubled haploid population
The majority of global wheat (Triticum aestivum L.) production is subject to infection by the stripe rust pathogen (Puccinia striiformis Westend. f. sp. tritici Erikss.). The evolution of new stripe rust races appears to ... -
Repurposing agricultural and municipal wastes to supply soil with plant-available phosphorus
Inorganic phosphorus (P) is a finite resource used to develop fertilizers, heavily applied in agricultural systems, necessary to maintain global crop yields that satisfy global food security needs. In addition to concerns ... -
Effects of Management-intensive Grazing in relation to soil health and forage production in an irrigated perennial pasture system
Interest in Management-intensive Grazing (MiG) on irrigated, perennial, cool-season pasture has increased steadily in Colorado due to pressure to reduce public lands grazing, overall declining space available for pasture, ... -
Reuse of oil and gas produced water for irrigation of spring wheat (Triticum aestivum L.): plant physiological and immune system response
Water resources for agricultural irrigation in the semiarid western United States are challenged due to increased oil and gas (O&G) activity and increasing water scarcity. Produced water (PW) generated from the O&G industry ... -
Effect of tillage on soil physical properties and crop production
The objective of this study was to determine the effect of two tillage systems -- conventional tillage (CT) and reduced tillage (RT) -- for a three-year corn-corn-watermelon rotation on: 1) biological production of corn ... -
Crop residue: a hero's journey from biomass to soil carbon in eastern Colorado dryland crop rotation systems
Crop residues play a vital role in reducing the potential for wind erosion of agricultural soils in arid and semi-arid regions. The residues act via three modes: reducing wind speed, acting as a physical impediment to wind ... -
Factors contributing to maize and bean yield gaps in Central America vary with site and agroecological context
In Central America, the population and associated food demands are rising rapidly, while yields of their staple crops, maize and beans, remain low in a global context. To identify the main limiting factors to crop production ... -
Analysis of land use change and greenhouse gas emissions in Kalasin Province, Thailand
Growing global population causes many stresses on the environment, perhaps the most serious is global warming due to Greenhouse Gas (GHG) emissions. Major contributors to GHG emissions include agricultural production and ... -
Comprehensive microbiome analysis of wheat and its wild relatives, A
Microbiomes are diverse assemblages of endophytic and free-living microorganisms that can confer competitive advantages to their plant hosts such as water acquisition, nutrient mobilization, drought tolerance, salt tolerance, ... -
Integrated assessment of agricultural ecosystems using simulation-optimization and machine learning
Agriculture provides many ecosystem services to human society but is also a major cause of environmental degradation. The key challenge of modern agricultural production is to meet projected increases in global demands for ... -
Genetic diversity of ACC-deaminase positive bacteria in Colorado soil under winter wheat cultivars (Triticum aestivum L.)
ACC-deaminase positive bacteria (ACC+) promote plant growth and development by lowering abiotic stress ethylene levels through deamination of 1-aminocyclopropane-1-carboxylic acid (ACC), the immediate precursor of ethylene. ...
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