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

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Spatially consistent corn yield variability on the Loess Hills of Northwest Iowa: a critical look, Thomas J. Lawler

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Genome-wide association and epistasis studies of Sclerotinia sclerotiorum resistance in soybean, Tara Catherine Moellers

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Nitrogen pools and fluxes in diversified cropping systems, William Robert Osterholz

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Biomass sorghum and maize have similar water-use-efficiency under non-drought conditions in the rain-fed, Midwest US, Matthew Roby

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Why is SMOS dry compared to soil moisture observed by the South Fork in situ soil moisture network?, Victoria A. Walker

Theses/Dissertations from 2015

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Developmental morphology, biomass yield and compositional differences among upland and lowland switchgrass (Panicum virgatum L.) ecotypes grown as a bioenergy feedstock crop, Muhammad Aurangzaib

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Climate-smart agriculture in Midwest cropping systems: evaluating the benefits and tradeoffs of cover crops, Andrea Diane Basche

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Phenotypic and genetic variation in an Apios americana breeding collection; and characterization of the HD-Zip gene family, involved in abiotic stress responses in Glycine max, Vikas Belamkar

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Enabling broad use of genome modification technologies to solve real world problems: a specific application in peanut, Vincent Antonio Brazelton Jr.

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Influence of Bradyrhizobium inoculation and fungicide treatment on development and yield of selected pulse crops; Nutritional composition of pulse legume leaves and the impact of leaf removal on yield, Rosemary Bulyaba

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Changes in extreme precipitation events over the central United States in AOGCM-driven regional climate model simulations, Ariele Rhiane Daniel

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The physiological effects of the seed treatment Stamina on maize seedling length, ADP:O ratios, and respiration rates, Katy Lynn Darrah-Wiedemeier

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Microbial decomposition of corn residue in two Iowa Mollisols, Omar de Kok-Mercado

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Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system, Gerald Neil De La Fuente

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Screening of herbicides for selective weed control in African marigold (Tagetes erecta), Katie Jean Demers

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Gametophytic cross-incompatibility in maize: resequencing the Ga1 locus, Marianne Lynn Emery

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Biochar properties and impact on soil CO2 and N2O emissions, Rivka Brandt Fidel

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Validation and application of close-range photogrammetry to quantify ephemeral gully erosion, Karl Richard Gesch

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Genetic and physiologic analyses of soybean grain yields in water limited environments, Dawn Gibson

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Sensible heat balance method to determine rates of soil freezing and thawing, Yuki Kojima

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Influence of corn seeding rate, soil attributes, and topographic characteristics on grain yield, yield components, and grain composition, Mark Allen Licht

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Cover crop impacts on soil quality during Miscanthus x giganteus establishment in central Iowa, Joyce Y.J. Lok

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Portable canopy chamber measurements of evapotranspiration in corn, soybean and reconstructed prairie, Chenyi Luo

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Suitability of winter canola (Brassica napus) for enhancing summer annual crop rotations in Iowa, Rafael A. Martinez-Feria

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Nitrogen mineralization in biofuel cropping systems in soils, Yili Meng

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Pedology of corn productivity indices for selected parts of Southern Highland Zone of Tanzania, Johnson Godlove Mtama

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Plant molecular farming for the production of industrial enzyme and vaccines, Hartinio N. Nahampun

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Genetic architecture and predictability of seedling root traits in maize (Zea mays L.), Jordon Michael Pace

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Biosynthetically produced amino acid byproducts can replace nitrogen fertilizers for corn production, Juan Carlos Quezada Rivera

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Winter rye cover crop effect on corn seedling pathogens, Lara Ann Schenck

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Plant tissue analysis to assess phosphorus and potassium nutritional status of corn and soybean in Iowa, Andrew John Stammer

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Identification of QTL associated with nitrogen metabolism in a maize (Zea mays L. ssp. mays) testcross population, Ignacio Trucillo Silva

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Time domain reflectometry waveform analysis with second order bounded mean oscillation, Zhuangji Wang

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Corn seedling response to silicon amendments in three Iowa and one Chinese soil, Ziying Wang

Theses/Dissertations from 2014

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Interactions between cover crops and weed management in Iowa's conventional cropping systems, Meaghan Jean Bryan Anderson

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An integrative approach for germplasm utilization, genetic diversity and QTL mapping in Camelina spp. and crop-production issues in Thlaspi arvense, new promising oilseed crops for bioenergy and industrial uses, Ivan Mauricio Ayala Diaz

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Adaptability potential of corn for groundcover cropping systems, Nickolas James Bowden

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Evaluation of an agroecosystem model using cosmic-ray neutron soil moisture, Benjamin David Carr

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Fumonisin B1 toxicity in swine: a comparative analysis of genetically engineered Bt corn and non-Bt corn by using quantitative dietary exposure assessment modeling and ecotoxicological investigations on earthworms, James Edward Delgado

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A carbon assessment of Iowa State University's land, Catherine Rosson DeLong

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A comparison of carbon storage potential in corn- and prairie-based agroecosystems, Ranae Dietzel

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Relationships between foliar applied micronutrients, soil and tissue tests, and grain yield in soybean, Joshua T. Enderson

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Intensifying intrinsic genetic variation in soybean [Glycine max (L.) Merr.] inbred lines, Katherine Espinosa

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Genetic analysis of the IBM2Syn10-DH maize population for response to low and high nitrogen input, Pedro José Gonzalez-Portilla

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Soil hydraulic conductivity in a non-wheel traffic corn row, a wheel traffic corn row, and a reconstructed prairie, Sitha Ketpratoom

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Anion exchange capacity of biochar, Michael Lawrinenko

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A next generation of studies: Heterosis and inbreeding depression, Shreyartha Mukherjee

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A comparison of cellulosic fuel yields and separated soil-surface CO2 fluxes in maize and prairie biofuel cropping systems, Virginia Nichols

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Comparison of SMOS vegetation optical thickness data with the proposed SMAP algorithm, Jason Carl Patton

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Corn production with Instinct nitrification inhibitor applied with urea-ammonium nitrate solution and liquid swine manure, Aaron Michael Sassman

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Germplasm enhancement of maize: Utilization of doubled haploid breeding on adapted tropical sources, Andrew Smelser

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Efficiency study of testing and selection in progeny-row yield trials and multiple-environment yield trials in soybean breeding, Minghui Sun

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Loose and baled corn cob management and storage in field effects on subsequent crop growth and soil health, Carlos Gilberto Tenesaca

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Genome-wide association studies to dissect the genetic architecture of yield-related traits in maize and the genetic basis of heterosis, Jinliang Yang

Theses/Dissertations from 2013

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Density response of maize canopy architecture in adapted and unadapted synthetic populations, Naser Bader AlKhalifah

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Organic matter in Holocene paleosols at the Farwell site, Najwa Alnsour

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Hybrid breeding in perennial grasses based on self-incompatibility and self-fertility, Andrea Sofia Arias Aguirre

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Evaluation and prediction of corn stover biomass and composition from commercially available corn hybrids, Ty Jason Barten

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The influence of propagation method and stand age on Miscanthus x giganteus performance in Iowa, USA, Nicholas Boersma

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Dry matter and nutrient accumulation in corn hybrids from the 1960's to 2000's, Matt Boyer

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Nitrogen fertilization effects on soil organic carbon storage and aggregation mechanisms within continuous corn cropping systems, Kimberly Helen Brown

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Soil physical properties, soil carbon dioxide fluxes, and soil drainage dynamics of select bioenergy cropping systems, Aaron Lee Daigh

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Evaluation of residue management practices effects on corn productivity, soil quality, and greenhouse gas emissions, Jose German Guzman

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Correction for rapid-growth vegetation and testing of an upscaling method with a COSMOS probe, Samantha Lou Irvin

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Controlling biomass properties for optimizing fast pyrolysis products, Brandon Jeffrey

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Enhancing biological nitrogen fixation in common bean (Phaseolus vulgaris L), MERCY KASUZI KABAHUMA

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Association mapping analysis for brassinosteroid candidate genes and plant architecture in a diverse Sorghum bicolor panel, Maria Betsabe Mantilla Perez

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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