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Theses/Dissertations from 2020

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Short-term effects of integrated tillage systems and cover crop on agronomic response and soil health in North Central Iowa, Alex Mitchell Cleveringa

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Mapping of key traits in maize (Zea Mays L.) doubled haploid technology, Arthur Da Silva

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Winter annual alternative crops for enhanced sustainability in Iowa cropping systems, Gunnar Dinkla

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Understanding the variation in vegetation composition of prairie restorations within crop fields, Lydia English

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A multi-spatial scale analysis of land use and climate change impacts on water quality and crop productivity for major US cropping systems, Kelsie M. Ferin

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The application of machine learning algorithms in predicting soil organic carbon/matter, Yones Khaledian

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Molecular and phenotypic characterization of doubled haploid lines derived from different cycles of the Iowa Stiff Stalk Synthetic maize population, Alejandro Ledesma M

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Zinc to the sink: Genetics of increased Zn in maize kernels, Edna Kemunto Mageto

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Intercropping and relay cropping to increase productivity, resilience, and long-term sustainability of corn and soybean cropping systems in Iowa, Swetabh Patel

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Influence of cereal rye spring termination timing and herbicide type on soil nitrate and litter composition, Rebecca Abbott Roberts

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Heterosis, inbreeding depression and genetic divergence in maize, Fernando Silva Aguilar

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Influence of phosphorus fertilization and no-tillage on maize and soybean root morphology and rhizosphere nutrients dynamics, Tomas Javier Sitzmann

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Using SMAP and SMOS vegetation optical depth to measure crop water in vegetation, Kaitlin Togliatti

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Discovery and translation of genetic resistance to soybean cyst nematode, Haley Trumpy

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Using spontaneous haploid genome doubling to access favorable alleles in exotic maize (Zea mays L.) germplasm, Anderson Luiz Verzegnazzi

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Machine learning analytics for predictive breeding, Zhanyou Xu

Theses/Dissertations from 2019

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Characterizing climate change in the Midwest: Magnitude of warming and plausibility of adaptation strategies for maize-based systems, Lori Jean Abendroth

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Increasing rice productivity in the lowland soils of the interior savanna of Ghana: The role of rice husk biochar and phosphate rock, Vincent Kodjo Avornyo

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Soil health and root-influenced biochemical dynamics in conventional and integrated livestock systems in central Iowa, Rebecca Ann Baldwin-Kordick

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The effect of year-to-year variability on planting date and relative maturity selection for maize, Mitch Baum

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Delineation of NDVI-based soil management zones: Applications of UAS technology, Daniel Brummel

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Limestone application on a Ferralsol soil and genotype by environment effects on yield and grain nutrient composition in common bean, Rosemary Bulyaba

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UHF band attenuation through a corn canopy with crop growth, Richard Jay Cirone

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Evaluation techniques for sense and spray weed management, Joshua J.R. DeGroot

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Genetic dissection and prediction of leaf angle across the maize canopy, Matthew James Dzievit

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Phenotypic and molecular characterization root system architecture in diverse soybean (Glycine max L. Merr.) accessions, Kevin G. Falk

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Planting date, cultivar maturity, and environment effects on soybean yield and crop stage, Ashlyn Kessler

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The effects of road surface concrete grinding residue (CGR) on selected soil properties and plant growth, Chenyi Luo

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Noncontributing areas as indices of landscape development in the glaciated Central Lowlands, USA, Joshua Joseph McDanel

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Exploring decomposition of household items as an inexpensive, yet scientifically-robust, tool for assessing soil health, Teresa Middleton

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Characterization and application of Arkansas male sterile lines for hybrid rice production, Dustin North

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Development of phenomic-assisted breeding methodologies for prescriptive plant breeding, efficient cultivar testing, and genomic studies, Kyle Parmley

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Contrasting soil nitrogen dynamics under Zea mays and Miscanthus × giganteus: A story of complex interactions among site, establishment year, and nitrogen fertilization, Jacob E. Studt

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A statistical analysis of Zea mays grain yield response to nitrification-inhibitor amendments under field conditions utilizing parametric and non-parametric techniques, Elliot H. Sully

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Age and nitrogen effects on Miscanthus × giganteus growth and development, Mauricio D. Tejera

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Assessment of inducibility and spontaneous haploid genome doubling in maize (Zea mays L.), Benjamin Thomas Trampe

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Study and improvement of maize maternal haploid inducers, Henrique Uliana Trentin

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A new approach for retrieving soil moisture from SMAP over the Corn Belt, Victoria A. Walker

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Pattern discovery for genome-wide base composition evolution and genetic dissection of NDVI with UAV-based remote sensing in crops, Jinyu Wang

Theses/Dissertations from 2018

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Surface energy balance partitioning in tilled and non-tilled bare soils, Ohene Akuoko

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Functional characterization of a fungal polyamine oxidase FvPO1, Jordan Lillian Baumbach

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Fumonisin B1 in Bt and non-Bt maize: A meta-analysis, Kayla Cappelle

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Haplotype sharing analysis in maize ex-PVP germplasm and relationships with key founders, Stephanie Coffman

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Soybean nitrogen dynamics: Nitrogen fixation, yield, and residue decomposition, S Carolina Cordova Martinez

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The promise of biochar: From lab experiment to national scale impacts, Hamze Dokoohaki

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Identification and QTL mapping of physiological drivers of soybean yield under contrasting management systems using high-throughput phenotyping, Race Heith Higgins

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Genetic and environmental control of lignin biosynthesis and C emission from crop stover, Sarah Hill-Skinner

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Evaluation of nitrogen and potassium interactions in corn, Jackson Hirniak

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The influence of multiple herbicide resistance on growth and development of Amaranthus tuberculatus and the efficacy of the very long chain fatty acid-inhibiting herbicides on multiple herbicide-resistant Amaranthus tuberculatus; Investigating a putative 4-hydroxylphenylpyruvate dioxygenase-inhibiti, Eric Alexander Lyle Jones

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Bioactive seed coatings against Goss’s wilt using stabilized bacteriophages in polymers, Chad Kimmelshue

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Effect of soybean sudden death syndrome on seed quality and agronomic trait QTLs, Josh Knight

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Phenotypic and genomic selection for multi-trait improvement in soybean line and variety development, Andreomar Kurek

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Dissecting complex phenotypes via multiple transcriptome-based GWAS, Hung-Ying Lin

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Spatial modeling of agricultural catchments with management boundaries, Daniel Linton

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Investigations into the function of common milkweed (Asclepias syriaca) in the agricultural landscape, Sydney Lizotte-Hall

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Using genomic and gene expression methods to understand the phenotypic response of soybean to sudden death syndrome caused by Fusarium virguliforme, Alexander Stephen Luckew

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Understanding and predicting nitrogen dynamics in the Midwest United States Corn Belt, Navreet Kaur Mahal

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Genetic and brassinosteroid control underlying leaf angle variation across the canopy in sorghum, Maria Betsabe Mantilla Perez

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Cover crop effects on maize productivity: Insights from statistical and process-based models, Guillermo Marcillo

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Drivers of yield and nitrogen-loss tradeoffs: Cropping system evaluations with process-based modeling, Rafael Alejandro Martinez-Feria

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Auxinic herbicide residue impact on soybean [Glycine max (L.) merr.] growth and yield, Kevin Ross Mcgregor

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Integrating environmental models and precision agriculture data to identify spatially explicit subfield opportunities for increased sustainability and economic return, Gabriel Sean McNunn

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Genetic dissection of photosynthetic traits in sorghum under cold and drought stress, Diego Ortiz

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Evaluation of statistical and process-based models as nitrogen recommendation tools in maize production systems, Laila Alejandra Puntel

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Evolutionary histories of legume genomes and mechanisms of genome remodeling, Longhui Ren

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The role of biosolids-derived dissolved organic matter on the interaction of selected endocrine-disrupting chemicals with two alluvial soils, Fritzie Rivas

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Winter cereal rye and selected brassica cover crops for forage prior to soybeans, Timothy James Sklenar

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Improvement and expansion of doubled haploid technology, Kimberly Helen Vanous

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Detecting changes in soil health due to management in the context of landscape position, Elaine Vizka

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Mapping and identification of Candidate Arabidopsis PSS5 and PSS19 genes that confer nonhost resistance against the soybean pathogens, Phytophthora sojae and Fusarium virguliforme, Yang Yang

Theses/Dissertations from 2017

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Scaling understanding of biochar aging impacts on soil water and crop yields, Deborah Marie Aller

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Perennial groundcovers for maize-based bioenergy production systems, Cynthia Anna Bartel

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The optimization of introgression projects for plant genetic improvement, John Nicholas Cameron

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Genetic studies on self-fertility in perennial ryegrass (Lolium perenne L.) with implications for hybrid breeding in allogamous grasses, Javier Do Canto Fagundez

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Genome wide association study of seed and seedling root traits in sunflower, Ze Tian Fang

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Evaluating alternative, diverse cropping systems that include canola, wheat, and red clover in Iowa, Stefans Robert Gailans

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Investigations into nutritional quality, commercial productivity, and genetic purity of maize grain for organic production systems, Ryan Huffman

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Identification of spectral disease signatures and resistant QTL for charcoal rot infection in soybean, Sarah Jones

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Soybean [Glycine max (L.) Merr.] agronomic performance, seed characteristics, and aconitase isozymes variability in response to environmental stimuli, Grace Kaudzu

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Assessment of genetic diversity and recombination in maize, Alina Ott

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Nitrogen fertilization and crop diversity effects on soil carbon and nitrogen cycling in Iowa cropland, Hanna Jane Poffenbarger

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Molecular and phenotypic characterization of doubled haploid exotic introgression lines for nitrogen use efficiency in maize, Darlene Lonjas Sanchez

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How does inclusion of weather forecasting impact in-season crop model predictions?, Kaitlin Togliatti

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Numerical methods in soil hydrology: TDR waveform analysis and water vapor diode simulation, Zhuangji Wang

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Production, perceptions and limitations of organic small grains in Iowa, David Weisberger

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Developing specialty corn for niche markets in the public sector: A story of tradition and innovation, Hannah Worral

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Genetic dissection of sorghum plant architecture traits and seed number variation, Jing Zhao

Theses/Dissertations from 2016

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Cover crop options and mixes for upper Midwest corn-soybean systems, Seth R. Appelgate

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Growth, productivity, and utilization of kenaf (Hibiscus cannabinus L.): A promising fiber and fuel crop for Iowa, Marie Bourguignon

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Carbon and nitrogen stabilization across a reconstructed prairie chronosequence at Neal Smith Wildlife Refuge, Shane Michael Bugeja

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Quantifying senescence-mediated nutrient loss processes in switchgrass (Panicum virgatum L.) biomass, Ruth Helen Burke

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Pedogenesis of outwash derived soils on terraces of the Des Moines River, Ethan Matthew Dahlhauser

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The use of genetic information to predict the relative maturity of soybeans, Tracy William Doubler

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Organic matter in Holocene paleosols in the US Mid-Continent, Llewin Hugh Froome

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Improved production systems for common bean in south-central Uganda: I. Liddugavu soil, II. Limyufumyufu soil, Lance Henry Goettsch

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Potassium and sulfur availability and lime potential of ash co-product of corn cellulosic ethanol processing, Samuel Groenenboom

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Brassinosteroid and gibberellin control of plant height in maize (Zea mays. L), Songlin Hu

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Evaluating temperate and tropical corn for biomass production in central Iowa, Pedro Alexander Infante-Posada

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Investigation of the anti-virC2 transcript in Agrobacterium tumefaciens, Abbagail Lauren Johnson

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Influence of source and particle size of agricultural limestone on efficiency at increasing soil pH, John David Jones