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Theses/Dissertations from 2016

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Organic no-till and strip-till systems for broccoli and pepper production, Dana Lipinski Jokela

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Targeted mutagenesis in the tetraploid switchgrass cultivar 'Alamo' using CRISPR-Cas9, Paul Britten Merrick

Theses/Dissertations from 2015

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Horticultural potential of Nyssa biflora Walt. (swamp tupelo), Frank D. Balestri

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Integration of summer and fall cover crops in vegetable cropping systems, Raymond Albert Kruse

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Horticultural evaluation of soy-based bioplastics for container-crop production, Kenneth Gene McCabe

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Evaluation of creeping bentgrass (Agrostis stolonifera L.) responses to an amino acid containing co-product, Isaac Mertz

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Limited irradiance, artificial fluorescent irradiance, and nitrate-N:ammonium-N impact on biomass and essential oil production of Ocimum basilicum L., Tara Marie Springer

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Motivation and retention of Iowa’s Master Gardener volunteers, Bryn Takle

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Strip tillage and rowcovers as a potential alternative to black plastic mulch in cucurbit production, Jennifer Louise Tillman

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Quantifying the effects of hydroponic systems, nutrient solution, and air temperature on growth and development of basil (Ocimum L.) species, Kellie Jean Walters

Theses/Dissertations from 2014

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Biochar's fitness as an amendment in bell pepper transplant and field production, Brandon Henry Carpenter

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Values-based supply chains: local and regional food systems in the Upper Midwest United States, Kevin Richard Duerfeldt

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Genomic studies of abiotic stresses in grasses, Jingjie Hao

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Mobile mRNA: a long distance signaling system in potato, Tian Lin

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Effect of short-term versus prolonged freezing on freeze-thaw injury and post-thaw recovery in spinach: Importance in laboratory freeze-thaw protocols, Kyungwon Min

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Photosynthetically active radiation and root-zone temperature effects on high-tunnel primocane red raspberry growth and development, Leah Beth Riesselman

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The effects of canopy management practices on fruit quality of northern-hardy interspecific hybrids of Vitis spp., Dylan Paul Rolfes

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Evaluating horticultural practices for sustainable tomato production in Kamuli, Uganda, Sharon Mbabazi Tusiime

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Stage of maturation, crop load, and shoot density affect the fruit quality of cold-hardy grape cultivars, Randall Vos

Theses/Dissertations from 2013

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Genomic and Genetic Studies of Environmental Control of Brachypodium Growth and Development, Ying Feng

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Biochar as a replacement for perlite in greenhouse soilless substrates, Jake Northup

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Phylogeography of eastern leatherwood (Dirca palustris L.) resolved by chloroplast sequencing and microsatellite genotyping, Bryan James Peterson

Theses/Dissertations from 2012

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Evaluation of polypyrimidine tract-binding protein gene promoters in potato (Solanum tuberosum cv. Désirée), Nathaniel Martin Butler

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Nitrogen based establishment and seedbanking potential of Kentucky bluegrass and perennial ryegrass in athletic fields, Andrew Hansen Hoiberg

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Evaluation of rootstock and crop load effects on the performance of `Gibson Golden Delicious' and three scab-resistant apple cultivars, Dennis Ndahura Katuuramu

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The impact of a school garden program on agriculture learning by primary school children in rural Uganda, Amanda Snodgrass

Theses/Dissertations from 2011

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Antioxidants and dehydrin metabolism associated with osmopriming-enhanced stress tolerance of germinating spinach (Spinacia oleracea L. cv. Bloomsdale) seeds, Keting Chen

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Use of geographic information systems at Gifft Hill School, St. John, U.S. Virgin Islands, Kevin Richard Duerfeldt

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Potassium-magnesium antagonism in high magnesium vineyard soils, Joseph Michael Hannan

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Competitive ability of creeping bentgrass cultivars and their potential for renovating existing putting greens through interseeding, Marcus Jones

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Horticultural & ecophysiological evaluations of leatherwoods (Dirca spp.), Kelly D. Norris

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Direct determination of 1-aminocyclopropane-1-carboxylic acid in plant tissues by using a gas chromatograph with flame-ionization detection, Katey H. Warnberg

Theses/Dissertations from 2010

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Sand-based turfgrass root-zone modification with biochar, Shane R. Brockhoff

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Grain amaranth production and effects of soil amendments in Uganda, Michael William Graham

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Alternative weed management practices: Effects on weed control, grapevine performance, and soil quality in an established midwestern vineyard, Lisa Marie Wasko

Theses/Dissertations from 2009

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Horticultural potential and population genetics of Nyssa aquatica L. (water tupelo), Nickolee Zollinger Boyer

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Freezing tolerance and dehydrin protein expression in `Frontenac' and `Seyval blanc' grapevine bark and xylem cane tissues during acclimation, midwinter, and deacclimation, Lee Huntington Trebbien Goldsmith

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Horticultural evaluation of zein-based bioplastic containers, Matthew Steven Helgeson

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Seeding Rates of Annual Ryegrass That Maximize Turf Cover When Sown During Traffic, Andrew Hansen Hoiberg

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Topdressing and aerification programs on creeping bentgrass fairways, Matthew Thomas Klingenberg

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Genetic profile and horticultural evaluation of Styrax americanus (American snowbell), Olivia Marie Lenahan

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Ecology and horticultural potential of Dirca palustris, Bryan James Peterson

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Photoprotective strategies in overwintering rhododendrons, Xiang Wang

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Evaluation of online educational tools in horticulture: An online course and problem-solving software, Tigon Woline

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Identification and characterization of cold-responsive genes in perennial ryegrass, Chunzhen Zhang

Theses/Dissertations from 2008

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Irradiance, total nitrogen, and nitrate-N: ammonium-N ratio requirements for optimal edible biomass production of basil, Angela Renee Beaman

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Freezing tolerance and cold acclimation in guava (Psidium guajava L.), Wei Hao

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Perceptions of managers and Spanish-speaking employees in the Iowa horticultural industry, Emilie Justen

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Long-term rotation with monoculture cover crops increases yield of strawberry, reduces weed populations, and maintains soil chemical, physical, and biological characteristics during strawberry production, Dennis Nicklas Portz

Theses/Dissertations from 2007

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Field evaluation of reduced-growth, glyphosate-resistant Kentucky bluegrass in competitive and noncompetitive settings, Christopher James Blume

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Summer-induced iron chlorosis on Kentucky bluegrass turf, David Michael DeVetter

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Soil quality in strawberry and vineyard agroecosystems maintained under conventional and alternative weed management systems, Craig Alan Dilley

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Field evaluation of winterkill in annual bluegrass (Poa annua L.) and creeping bentgrass (Agrostis stolonifera L.), Federico J. Valverde

Theses/Dissertations from 2006

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Enhancement of plant performance and biochemical constituents in field and hairy root production of Echinacea , Fredy Rolando Romero Orellana

Theses/Dissertations from 2005

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Influence of mowing frequency and mower sharpness on efficiency of PSII and antioxidant and carbohydrate metabolism of creeping bentgrass , Mark John Howieson

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Ecophysiology and population genetics of Frangula caroliniana (Walt) Gray (Rhamnaceae) , J. Ryan Stewart

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Soil testing methods and basic cation saturation ratios of creeping bentgrass greens , Rodney Alan St. John

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QTL mapping and gene discovery in perennial ryegrass (Lolium perenne L.) , Yanwen Xiong

Theses/Dissertations from 2004

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Biology of the Frankia-Alnus maritima subsp. maritima symbiosis , Heidi Ann Kratsch

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Remote sensing of moisture and nutrient stress in turfgrass systems , Jason Keith Kruse

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Analysis of genetic diversity in colonial bentgrass (Agrostis capillaris L.) and rough bluegrass (Poa trivialis L.) by using randomly amplified polymorphic DNA (RAPD) markers, Shanmugam Rajasekar

Theses/Dissertations from 2003

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Three amino acid loop extension (TALE) transcription factors that regulate potato (Solanum tuberosum L) tuberization , Hao Chen

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Evaluation of nitrogen source, phosphorus rate and mixing depth for growth and establishment of Poa pratensis L. on sand-based systems, Sang-Kook Lee

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Determination of reproductive mode and genome size of a USDA core collection of Kentucky bluegrass (Poa pratensis L.) by cell flow cytometry, Robert Richard Wieners

Theses/Dissertations from 2002

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Transcription factors involved in the development of potato (Solanum tuberosum L) , Faye Michelle Rosin

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Biosystematics and phenology of Alnus maritima (Betulaceae) , James Alan Schrader

Theses/Dissertations from 2001

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Effects of ethephon on growth and morphology of perennial grasses, Mark John Howieson

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Physical properties of golf and sports turf root-zones as affected by amendments, construction methods, and management practices , Deying Li

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Supplemental calcium applications to turfgrass established on calcareous sand, Rodney Alan St. John

Theses/Dissertations from 2000

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Management of SportGrass for athletic fields, Jay Scott Hudson

Theses/Dissertations from 1999

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Corn gluten meal and corn gluten hydrolysate for weed control, Melissa Caroline McDade

Theses/Dissertations from 1998

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'Penncross' creeping bentgrass response to DTPA-TEA, AB-DTPA, and Mehlich III extractable copper levels in two sand media, Michael Blake Faust

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Ecophysiology and genetic diversity of hard maples indigenous to eastern North America , Rolston St Hilaire

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Potato lipoxygenase genes: their role in tuber formation and defense responses against pathogens , Mikhailo V. Kolomiets

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The effects of recycled rubber particles as a turfgrass topdressing amendment for intense traffic areas, Jeffrey James Salmond

Theses/Dissertations from 1996

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A novel mechanism for resistance to Colorado potato beetle (Leptinotarsa decemlineata) in wild Solanum species , Evans Olonyi Sikinyi

Theses/Dissertations from 1995

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Characterization of genes expressed during vegetative organ development in potato (Solanum tuberosum L.) , Sang-Gu Kang

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Root-zone temperature effects on the nutrient uptake of horticultural crops , Kimberly Anne Klock

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Induction of tuber gene expression in solanaceous species by methyl jasmonate and wounding , Tsu-Hwie Annie Liu

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Cloning and characterization of two chlorophyll synthesis genes expressed during tomato fruit development , Gary Francis Polking

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Cellular effects in perennial ryegrass (Lolium perenne L.) associated with the root inhibiting compound alaninyl-alanine , Joseph Bryan Unruh

Theses/Dissertations from 1993

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Investigating low temperature tolerance and winter protection systems for herbaceous perennials , Jeffery Kenneth Iles

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Isolation and identification of root-inhibiting compounds from corn gluten meal , Dianna Lan-Ying Liu

Theses/Dissertations from 1991

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In vitro studies on germination of immature ovules and plant regeneration from cotyledons of Impatiens platypetala Lindl , Kyungchul Han

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Relationships between ethylene biosynthetic pathway metabolites during banana fruit ripening , Sylvio Luis Honorio

Theses/Dissertations from 1990

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Storage protein degradation and proteolytic enzyme activities during germination of water stressed impatiens seeds , Mehrassa Khademi

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Creeping bentgrass response to increasing DTPA-extractable zinc levels in modified soil, Grant Thomas Spear

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Purification and characterization of the 22-kilodalton potato proteinase inhibitors , Sang-Gon Suh

Theses/Dissertations from 1989

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Growth and morphological characteristics of low- and high-maintenance Kentucky bluegrass (Poa pratensis L.) cultivars, Michael Gene Burt

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Effects of low-oxygen atmospheres on impatiens seed germination , Paul Thomas Karlovich

Theses/Dissertations from 1988

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Anther culture in the tomato (Lycopersicon esculentum Mill) callus and plantlet production studies , Juan Jaramillo

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Physiological effects of silver thiosulfate, (aminooxy)acetic acid, and malonate pulse treatments on the inhibition of ethylene biosynthesis and mode of action in carnations , Ruey-Song Lin

Theses/Dissertations from 1987

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Regulation of Kentucky bluegrass (Poa pratensis L) morphogenesis by growth retardants and exogenous ethylene , Kenneth Lynn Diesburg

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Biosynthesis of 1-aminocyclopropane-1-carboxylic acid and ethylene from [delta]-aminolevulinic acid in ripening tomato fruits , Diaa El-Deen Ahmed El-Rayes

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Effect of urease inhibitors and cationic materials on growth response and ammonia volatilization following fertilization of Kentucky bluegrass (Poa pratensis L.) with urea , Young Kyoo Joo

Theses/Dissertations from 1986

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Absorption and release of carbon monoxide by C3 and C4 turfgrasses in light and dark, David J. Brahm

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The use of fenarimol and chlorsulfuron for selective control of annual bluegrass (Poa annua L.) in cool-season turfs, Michael Charles Gaul

Theses/Dissertations from 1985

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Effects of calcium nutrition and atmospheric carbon dioxide, oxygen, and ethylene on the growth and quality of mungbean (Vigna radiata (L.) Wilczek) sprouts , Siti Hajar Ahmad

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Selective control of perennial grasses in Kentucky bluegrass (Poa pratensis L.) turf with chlorsulfuron, Brian Michael Maloy

Theses/Dissertations from 1984

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Determination of 1-aminocyclopropane-1-carboxylic acid (ACC) synthase in Poa pratensis induced by mechanical or biotic factors and characteristics of the assay for ACC , Lloyd W. Colemann III