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Theses/Dissertations from 2013

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Effect of corn stover harvest and winter rye cover crop on corn nitrogen fertilization, Jose L. Pantoja

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The effects of starter fertilizer on root and shoot growth of corn hybrids and seeding rates and plant-to-plant variability in growth and grain yield, Warren Pierson

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Physiology of genotype x soil fertility effects on yield and accumulation of iron and zinc in the common bean (Phaseolus vulgaris L.) seed, Gerald Sebuwufu

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Corn yield variability on the Des Moines Lobe of Iowa: Assessment of extent and soil-related causes, Matthew Thomas Streeter

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Investigation of the Arabidopsis nonhost resistance mechanism against the soybean pathogen, Phytophthora sojae, Rishi Sumit

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Candidate gene based association study for nitrogen use efficiency and associated traits in maize, Bharath Kumar Thamasandra Narayana

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Field evaluation of the availability for corn and soybean of phosphorus recovered as struvite from corn fiber processing for bioenergy, Louis Bernard Thompson

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Pedogenesis of ant-colonized soils at Doolittle Prairie State Preserve, Iowa, Mary Lee Tiedeman

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Investigation of genes involved in the formation of nitrogen-fixing nodules in soybean, Chichun Yang

Theses/Dissertations from 2012

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Analysis of regional climate model simulations of winter seasonal precipitation, Andrew James Ansorge

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Breeding for β-glucan content in elite North American oat (Avena sativa L.) using molecular markers, Franco Garcia Asoro

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Performance evaluation of nine varieties of Miscanthus in Iowa, Muhammad Aurangzaib

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A Type II Metacaspase Interacts with RPS1-K-2 in Soybean and Analysis of the Soybean Metacaspase Gene Family, James Andrew Baskett

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Effect of fast pyrolysis biochar on physical and chemical properties of a sandy soil, Andres Santiago Basso

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Agronomic and seed traits of soybean lines with genes for aphid resistance, inheritance and mapping of Cowpea mild mottle virus-like resistance in soybean, and fatty ester composition of low-phytate, low-saturate soybean lines, Ryan Christopher Brace

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Seed development and germination of Miscanthus sinensis, Erik John Christian

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The use of reconstructed prairies in Iowa's agricultural landscape to increase ecosystem services and move towards multifunctionality, Rachael Ann Cox Ohde

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Evaluation of cover crops in reduced tillage systems for organic production, Dan Edward Cwach

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Application of soil test methods to study the availability of phosphorus in beef cattle manure, Nicolas Dagna

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Coupled heat, water, and solute transfer dynamics in wettable and non-wettable soils, Dedrick DeWaun Davis

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Evaluation and implementation of methods for quantifying organic and inorganic components of biochar alkalinity, Rivka Fidel

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Glyphosate-tolerant Asiatic dayflower (Commelina communis L.): Ecological, biological and physiological factors contributing to its adaptation to Iowa agronomic systems, Jose Maria Gomez

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Agronomic productivity of conventional and low-external-input cropping systems and their effect on giant foxtail (Setaria faberi) population dynamics, Robin Gomez

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The assessment of non-pathogenic related effects of the seed treatment Stamina on germinating maize under cold stress, Christopher Cody Hejlik

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Effects of environment and planting density on plant stature, flowering time, and ear set in IBM populations of maize, Sara Jane Helland

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Utilizing NDVI and remote sensing data to identify spatial variability in plant stress as influenced by management, Joshua John Henik

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Diversifying monoculture crops by incorporating prairie buffer strips, Sarah Marie Hirsh

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Breeding for cob traits in maize, Constantin Jansen

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Tradeoffs in ecosystem services of prairies managed for bioenergy production, Meghann Elizabeth Jarchow

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Persistence and ecological implications of maize-expressed transgenic endo-1,4-β-D-glucanase (E1) in agricultural soils, Adam Joseph Kenny

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Evaluating usefulness of 10 genomic regions associated with Sudden Death Syndrome resistance in soybean, Alexander Stephen Luckew

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Effects of maturity group, seed composition and storage conditions on the quality and storability of soybean (Glycine max L. Merrill) seed, Gladys Y. Mbofung

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Genetic dissection of canonical models of maize kernel growth and development, Kendra Ann Meade

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Nitrogen sources and sinks in Iowa soils: biogeochemical links between carbon inputs, nitrate leaching, and nitrous oxide emissions, David Mitchell

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Sustainable soils, sustainable communities: Promoting the environmental and social sustainability of human-soil interactions in Iowa, Eric Britt Moore

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Marker-assisted selection for elevated concentrations of the α′ subunit of β-, Sheilah Emilie Oltmans-Deardorff

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Potassium uptake, recycling, and soil-test temporal variability in soybean and corn, Ryan Richard Oltmans

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Bayesian prediction of crop performance modeling genotype by environment interaction with heterogeneous variances, Massiel Andrea Orellana

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Contribution of daily contiguous rainfall areas to warm season precipitation in the north central United States, Arin James Peters

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The impacts of colloidal material on the fate and transport of 17 B-estradiol in three Iowa soils, Jacob Reed Prater

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Field characterization of maize photosynthesis response to light and leaf area index under different nitrogen levels: a modeling approach, Laila Alejandra Puntel

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Lignin and carbon transformation in roots of maize and mixed perennial biofuel crops, Fritzie Rivas

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variability in soybean agronomic performance traits in response to 41 C heat and high relative humidity seed stress, Ruth Ann Rolling

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Quantification of a sensitive soil carbon constituent as affected by soil type, tillage system, and crop rotation, Victoria Elise Scott

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Effects of native perennial vegetation buffer strips on dissolved organic carbon in surface runoff from an agricultural landscape, Tomorra Elizabeth Smith

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Agronomic, seed traits and oleate stability of soybean lines containing the high-oleate transgene DP-305423-1 and the molecular characterization of the genomic region flanking the high-oleate transgene, Jordan Dustin Spear

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The effect of carotenoid candidate genes on the photosynthetic capacity of sorghum as assessed by Linkage Disequilibrium mapping, Katie Jo Strand

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Analysis of iron transporters in the soybean (Glycine max (L.) Merr.) genome, Dan Stribe

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New methods for haploid selection in maize, Yichia Tseng

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Where's the nitrogen? The timing and impacts of internal nitrogen cycling on switchgrass (Panicum virgatum L.) yield and biofuel quality, Danielle Marie Wilson

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Genomic landscape of the soybean (Glycine max) genome, Jenna Lynn Woody

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The effects of emergence timing and herbicide resistance on the ecological fitness and adaptation of common waterhemp (Amaranthus tuberculatus (Moq) Sauer) to agricultural systems, Chenxi Wu

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Heat transfer, evaporation and carbon dioxide transfer in soil, Xinhua Xiao

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Strategies for recombinant protein production in maize, Xing Xu

Theses/Dissertations from 2011

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Replication protein A and its role in the iron stress response of soybean, Sarah Atwood

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Utilization of active canopy sensors for nitrogen fertilizer management in corn, Daniel W. Barker

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Soybean seed production: Decisions and their relationship to seed quality, Timothy Daniel Berkland

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Novel approaches to improving qualities of maize endosperm, Anastasia Lorellen Bodnar

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pleiotropic effects of genes involved in cell wall lignification on agronomic characters, Yongsheng Chen

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Impact of the MON89788 event for glyphosate tolerance on agronomic and seed traits of soybean and molecular characterization of the mutant fap3(A22) allele for reduced palmitate concentration in soybean, Brian De Vries

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Did Recurrent Selection for Yield Affect Iowa Stiff Stalk Synthetic Maize Population Grain Fill Characteristics?, Steve James Eichenberger

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Earlier harvest and drying of soybean seed within intact pods maintains seed quality, Ross David Ennen

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Corn production with perennial ground covers: evaluation of cover species and their effects on corn growth and development, Ernest Scott Flynn

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Oil composition of low-phytate soybean lines containing genes for reduced palmitate and linolenate concentrations, John Gill

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Screening and genotyping of ga1 gene, and genotype x environment interaction of cross incompatibility in maize, Moises David Gonzalez

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Genetic basis of maize whole kernel, embryo, and endosperm oil, Karen Elaine Grote

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Establishment of switchgrass in corn across a landscape gradient: Establishment, yield, and quality of biomass feedstock, Theodore P. Gunther

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Argillic horizons and clay-sized particles - an alternative interpretation of their dynamics in sola development and across catenas, Mostafa Abdelssamie Abdelkhalik Ibrahim

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Production and characterization of transgenic maize plants designed to improve iron nutrition, Milly Nambogga Kanobe

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Mineral evaluation and Quantitative Trait Loci mapping in a soybean (Glycine max (L.) Merr.) population developed for iron deficiency chlorosis resistance, Keith E. King

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Effects of phosphorus and potassium fertilization rate and placement method on soybean (Glycine max L.) seed quality and long-term storability, Keaton Krueger

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Oat (Avena sativa L.) quality improvement for increased beta-glucan concentration, Mark Newell

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Soil pH and Lime Management for Corn and Soybean, Agustin Pagani

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Utilization of near-isogenic lines to identify genes underlying iron-efficiency QTL, Gregory Allan Peiffer

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Leaf wetness: implications for agriculture and remote sensing, Tracy L. Rowlandson

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Effect of dew and intercepted precipitation on radar backscatter of a soybean canopy, Eric Scott Russell

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Optimization of doubled haploid production in maize (Zea mays L.), Adam Edward Vanous

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Relationships between potassium fertilization, removal with harvest, and soil-test potassium in corn-soybean rotations, Carlos Xavier Villavicencio

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Soybean aphid development and agronomic performance of soybean lines with the Rag1 and Rag2 genes for insect resistance, Shaylyn Lena Wiarda

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Environmental analyses and candidate gene expression of ms9 male-sterility locus and computational identification of candidate genes for male-sterility loci in soybean, Christiana Wiebbecke

Theses/Dissertations from 2010

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Agronomic and seed traits of soybean lines with high-oleate concentration, Ryan Christopher Brace

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Isolation and characterization of a Fusarium virguliforme toxin that induces foliar sudden death syndrome in soybean [Glycine max (L.) Merr.], Hargeet Kaur Brar

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Agronomic and phenotypic responses to 75 years of recurrent selection for yield in the Iowa Stiff Stalk synthetic maize population, Brent Howard Brekke

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Deacclimation response to winter temperature fluctuations in Lolium perenne, Jacqueline Farrell

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The agronomic and economic performance of flax in Iowa, Stefans Robert Gailans

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Double-cropping sorghum for biomass production, Ben Michael Goff

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Weed growth in conventional and low-input cropping systems, Rachel Beverly Halbach

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Phosphorus sorption-desorption of soils and sediments in the Rathbun Lake watershed, Najphak Hongthanat

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The effects of previous-year corn hybrid and cropping system on current-year corn hybrids in second year corn, Wade Adam Kent

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Tillage effects on soybean growth, development, and yield, Alecia Marie Kiszonas

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Characterization of soybean GmPUB1 proteins that interact with the Phytophthora sojae effector Avr1b protein, Shan Li

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Agronomic and seed traits of soybean lines with the Rag1 gene for aphid resistance, Justin Lee Mardorf

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Soybean seedling emergence and yield in the presence of Fusarium virguliforme, Brent James Pacha

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Evaluation of an uncalibrated agricultural land model at the sub-field scale, Jason C. Patton

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Soybean improvement strategies: Insect-pollinator attraction and genetic resistance to whitefly and to brown stem rot, Paola T. Perez

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Effect of agronomic practices on sudden death syndrome of soybean in Iowa, Catherine Margaret Swoboda

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Fifty years of agricultural soil change in Iowa, Jessica Veenstra

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Numerical modeling of meteorological and topographical effects on pollen shed, dispersion, and viability, Brian Viner

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Native warm-season grasses: Species, nitrogen fertilization, and harvest date effects on biomass yield and composition, Naroon Waramit

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Comparing inter-specific competition for continuous corn grown in a living mulch with stover removal, Dustin R. Wiggans