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Long-Term Evaluation Of Liquid Vs. Granular Nitrogen Fertilization On Creeping Bentgrass [Agrostis Stoloniferous L. Var. Palustris Huds.] And Hybrid Bermudagrass [Cynodon Dactylon (L.) Pers. X C. Transvaalensis Burtt-Davy] Performance, Frederick Totten

All Dissertations

Limited turfgrass research comparing the efficiency of foliar to granular fertilizers exists. To expand upon previous research and to determine advantages and disadvantages between dry and liquid fertilizers applied to turf, research was conducted at Clemson University to compare the efficiency of three nitrogen (N) carriers (100% granular, 100% liquid, and 50% granular + 50% liquid) using N rates ranging from 98 to 390 kg ha-1 on growth and performance of creeping bentgrass and ultra-dwarf bermudagrass.

Studies were conducted in 2003 and 2004 to evaluate liquid and/or granular N fertilization on turfgrass quality, clipping yield, and root biomass of `L-93` …

Thatch Control, Winter Painting, And Plant Growth Regulator Management On Golf Course Putting Greens, Steven Long

All Theses

No abstract provided.

Horizontal Gene Transfer To Bacteria Of An Arabidopsis Thaliana Abc Transporter That Confers Kanamycin Resistance In Transgenic Plants, Kellie Parks Burris

Masters Theses

The use of antibiotic resistance markers is an important tool in the production and selection of transgenic plants. There have been increased concerns about the potential horizontal gene transfer (HGT) from transgenic plants to bacteria of medical and environmental importance. Until recently all antibiotic resistance genes used in transgenic studies have been bacterial in origin. An Arabidopsis thaliana ABC transporter, Atwbc19, was the first plant gene shown to confer kanamycin resistance when overexpressed in transgenic plants. The Atwbc19 gene was evaluated for its ability to transfer antibiotic resistance to Escherichia coli, which are found in the human gut and environment. …

Established Predators Of Fiorinia Externa Ferris (Hemiptera: Diaspididae) On Eastern Hemlock (Tsuga Canadensis (L.) Carriere) In Urban And Forest Sites, Christine Ann Lynch

Masters Theses

A project was initiated in September 2004 to determine the indigenous predators of Fiorinia externa Ferris, the elongate hemlock scale (EHS), on eastern hemlock and their impact on the pest populations. Branch samples were taken monthly from four sites (two forest and two urban) in eastern Tennessee and western North Carolina to assess predator damage from October 2004 to April 2006. Predators of this exotic pest were collected from beat sheet samples from September 2004 to May 2006. Laboratory tests were conducted from field-collected predators to assess food consumption, feeding behavior, and intraguild competition among predators of EHS. From field …

Probing Precursor Interactions With The Chloroplast Import Apparatus, Sarah Jean Wright

Masters Theses

The majority of plastid proteins are nuclear-encoded and imported post-translationally. A cleavable N-terminal extension, the transit peptide, targets these preproteins to the plastid. Transit peptides show very little primary sequence homology, yet are able to direct the precursor protein to interact with the protein components of the translocation complexes located within the inner and outer membranes of the chloroplast. In this study, a semi-conserved motif of the transit peptide, (F/W)(P/G)h(R/K) has been targeted for deletion in order to probe its importance. Two corresponding regions were deleted in the transit peptide of the precursor to the small subunit of Rubisco (prSSU) …

Latex Of Sciadopitys Verticillata (Thunb.) Siebold And Zuccarini: Antibiotic Properties, Phytochemistry, And Inhibition Of Adventitious Rooting Of Stem Cuttings., David Ira Yates

Electronic Theses and Dissertations

Sciadopitys verticillata was subjected to three propagation treatments designed to inhibit coagulation of its latex-like sap at the cut ends of the stem cuttings. Twenty-four hour soaking in water prior to rooting hormone application significantly enhanced production of adventitious roots. Old wood stem cuttings from shade-grown trees rooted at higher proportions than stem cuttings collected from sun-grown trees. Height, age, and place of origin of the source trees were not important factors in successful rooting. Antibacterial activity against some human pathogens and soil bacterial species was detected in latex application trials but the antibiotic activity was not related to the …

Expression Analysis Of Auxin Regulated Genes In Populus, Sara S. Jawdy

Masters Theses

Due to its many advantageous characteristics, such as a small sequenced genome, ease of vegetative propagation and availability of genomic tools and databases, Populus is widely becoming accepted as the model species among trees. In addition, DOE has chosen hybrid poplar as the model bioenergy feedstock tree. Due to the growing importance of the Populus species, genetic and genomic resources (EST and BLAST databases, genetic maps, etc.) are becoming increasingly available and are leading to a greater understanding of the functionality of the Populus genome. The goal of this study was to use these resources to further characterize the genetic …

Oxalate Production And Cation Translocation During Wood Biodegredation By Fungi, Jonathan S. Schilling

Electronic Theses and Dissertations

Wood biodegradation is primarily caused by Basidiomycetous white or brown rot fungi. White rot fungi are unique in degrading lignin, while brown rot fungi circumvent lignin to degrade holocellulose via iron-dependent oxidative chemistry. Both groups of fungi produce oxalate during wood metabolism, and oxalic acid secretion may promote wood decay by reducing pH, mobilizing iron, detoxifying copper, and immobilizing calcium. The function of oxalate during wood decay remains unclear, however, primarily due to difficulties in extracting bound oxalate and to inconsistencies among analytical techniques. This work aims to improve oxalate quantification during wood biodegradation and to better characterize fungal oxalate …

Determining Wear Tolerance Of Turfgrass Species For Athletic Fields In The Transition Zone, Jordan Rhea Goddard

Masters Theses

A study to evaluate the performance of four different turfgrass varieties under simulated athletic field traffic in the transition zone was conducted in Tennesseeand Arkansas. ‘Thermal Blue’ hybrid bluegrass (Poa arachnifera Torr. x P. pratensis L.) has been introduced as a bluegrass variety bred for increased heat and drought tolerance. This variety provides a possible alternative to bermudagrass varieties in transition zone athletic fields. ‘Thermal Blue’ was compared to common bermudagrass (Cynodon dactylon L. Pers.) varieties ‘Riviera’ and ‘Quickstand’ and the hybrid bermudagrass (C. dactylon L. Pers. x C. transvaalensis Burt-Davy) variety ‘Tifway’. Each turfgrass species was …

Management Of Hybrid Bluegrass (Poa Arachnifera Torr. X Poa Pratensis L.) In The Transition Zone, Travis Charles Teuton

Doctoral Dissertations

Dura Blue™ and Thermal Blue™ hybrid bluegrass (Poa arachnifera Torr. x Poa pratensis L.) have been selected for increased heat and drought tolerance and offer an alternative to traditional Kentucky bluegrass and tall fescue in the transition zone. Dura Blue and Thermal Blue were compared to Apollo™ Kentucky bluegrass, Dynasty™ tall fescue, and Kentucky 31 tall fescue. All turfgrass species tested were acceptable for use in the transition zone. Thermal Blue should be seeded from 50 to 150 kg seed/ha. Thermal Blue should be seeded in September for highest quality and most rapid turf cover. However, January and April …

The Fate And Transport Of Nitrogen (N) And The Effect Of Emergent Plants On Natural Treatment Of N-Species At Las Vegas Wash, Nevada, Tanju Kiriscioglu

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to analyze the effect of emergent plant communities at Las Vegas Wash (the System) using a system dynamics modeling approach. Understanding the dynamics of nitrogen (N —major polluting nutrient in the Wash) that enters the System is important because it occasionally causes algal blooms, choking Lake Mead through excessive eutrophication. Emergent plant communities are an integral part of wetland ecosystems and they play a crucial role in natural treatment of nutrients. This study is intended to test this hypothesis.

The study makes use of Wash data from reliable sources (Las Vegas Valley Water District, …

Mowing And Light-Weight Rolling Of Creeping Bentgrass (Agrostis Stolonifera L.) Putting Greens During Summer Heat Stress Periods In The Transition Zone, William Daniel Strunk

Masters Theses

A major challenge for golf course superintendents in the transition zone is to manage Agrostis stolonifera L. (creeping bentgrass) putting greens during heat stress periods of June, July, and August. In 2004 and 2005, a study was conducted to compare the effects of alternating rolling and mowing with traditional methods of everyday mowing on the green speed, turf quality, and disease occurrence creeping bentgrass putting greens in the transition zone. Treatments consisted of mowing six days week^-1 without rolling, mowing six days week^-1 with rolling three days week^-1, and mowing three days week^-1 alternating with …

Potassium And Cultivar Effects On Carbohydrate Partitioning In Upland Cotton, Jenny Dale Clement

Masters Theses

The indeterminate growth habit of upland cotton (Gossypium hirsutum L.) reduces the efficiency of yield formation when grown as an annual for its lint. Altering the determinacy may provide greater carbohydrate partitioning to reproductive structures, allowing higher yields. Another factor that may influence partitioning is potassium (K) nutrition. Potassium is essential for physiological and biochemical processes including translocation. It is necessary for ATP production, which is crucial for phloem loading and unloading. A three-year experiment was conducted at the West Tennessee Research and Education Center to evaluate carbohydrate partitioning in Paymaster 1218BG/RR (PM1218), a relatively determinate cultivar, and Deltapine …

Risk Assessment Of Genetically Modified Crops By Direct Tracking Pollen Movement And Testing Crop Genetic Load Using Directly Transformed Brassica Rapa With Bt Cry1ac And Gfp Genes, Hong Seok Moon

Masters Theses

One concern with crop biotechnology is that there might be crop to weed transgene flow, which could result in more invasive and competitive weed populations. Transgene expression, introgression of crop genes, and other ecological factors may alter the fitness or productivity of weed populations. The Brassica napus (crop) to Brassica rapa (weed) model to assess transgene flow and consequences has been widely used. In this study, weedy accessions of Brassica rapa were transformed with Bacillus thuringiensis (Bt) cry1Ac- and green fluorescence protein (GFP)- coding transgenes using Agrobacterium to develop plants to be subsequently used in risk assessment research. Regenerated transgenic …

Vascular Plant Species Richness And Distribution In A Heterogeneous Landscape, Kelly J. Mccloskey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The distribution of vascular plant species and species richness in a mid-elevation Rocky Mountain landscape can be attributed to a number of variables. The distribution of species with respect to physiognomic type, patch size, shape, and environmental heterogeneity was assessed for a mosaic landscape comprised of conifer forest, deciduous forest, and shrub-steppe physiognomic types in the southwest comer of Grand Teton National Park, Wyoming. This vegetation is representative of that found in other montane landscapes of the central Rocky Mountains. The vegetation was mapped to physiognomic type; distinct vegetation patches were sampled using one or more small (50 m^{2 …}

Influence Of Soil Compaction On Nitrogen Volatilization In A Management Intensive Grazing System: Estimation Of Gaseous N Losses Using Mass Balance In Intact Soil Cores, Luke Alan Petersen

Undergraduate Honors Capstone Projects

Increasing concern about the environmental impacts of greenhouse gases and PM 2.5 particulates has prompted many researchers to examine the processes of gaseous loss of nitrogen (N) from agricultural land. As agricultural production becomes more competitive and producers strive to become more efficient by reducing input costs, they will increasingly employ practices such as the rotational stocking, also called Management Intensive Grazing (MIG). MIG utilizes high animal stocking rates for short periods of time to efficiently harvest pasture crops. Unfortunately, MIG also produces relatively high concentrations of livestock excreta. This has caused intensive grazing practices to become a focal point …

Industrial Production Of Activated Carbon From Cotton Stalks, Mamdouh Magued Louis

Archived Theses and Dissertations

Utilization of agricultural waste in the production of valuable products can promote the national efforts in minimizing serious public health risks from exposure to dangerous fumes that result from burning in open fields at the end of every harvest season. An agricultural waste, namely cotton stalks, was chosen for developing a cost effective process for the production of activated carbon using bench equipment at laboratory scale, and typical industrial equipment at pilot scale. Findings show that the pilot scale production trial was successful in terms of equipments chosen and quality of activated carbon produced. Physical and pore analysis showed that …

Transport Of E. Coli In Egyptian Agricultural Soils As A Result Of Reclaimed Wastewater Use For Irrigation, Aimen Badawy

Archived Theses and Dissertations

Limited water resources are one of the main constraints to socio-economic development and even a source of insecurity at national and regional levels. The increasing demand for water in the agricultural sector stimulated the use of reclaimed wastewater for irrigation. Comprehending health and environment risks resulting from contaminants that may often be associated with reclaimed wastewater will lead to the sustainable use of this resource, as well as the conservation of other water resources.

In the present study the fate and transport of one important wastewater constituent, namely E. Coli bacteria, in three Egyptian soils of typical agricultural use was …

Utilización De Monensina Sódica, En Combinación Con Melaza, Urea Y Azufre Para Estimular Ganancia De Peso En Novillos En Etapa De Pre Ceba, Pedro Alexánder Fuentes Alarcón

Zootecnia

Esta investigación se realizó con el fin de evaluar la ganancia de peso en novillos comerciales tipo Pardo por Cebú, en praderas de pasto Estrella (Cynodon nlemfuensis) y kikuyina (Bothriochloa pertusa), suplementado con monensina sódica (Streptomyces cannamonensis) combinada con sal mineralizada, además de úrea y azufre mezclado con melaza. Conjuntamente se evaluó el consumo por animal de cada uno de los aditivos incluidos en la dieta y la relación costo beneficio de cada suplementación. Se conformaron 4 grupos de 20 novillos cada uno, elegidos completamente al azar; grupo experimental 1: mezcla melaza - úrea – azufre 555 gr/animal/día (melaza 90%, …

Apparent Digestibility In Lamas (Lama Glama), Fed With Brazilian Grass And Wheat In The C.E.A.C., William Edson Velez Contacayo

Theses and Dissertations

Considering the activity of introducing genetic resources with a high potential for yield, and with a wide adaptation range, it is possible to strengthen the cattle production system, through the production of adequate forage in quality, and quantity. Brazilian grass was introduced to Bolivia in 1974 for demonstrating excellent forage characteristics, and great adaptation qualities to the different ecosystems of the Andes. The material was introduced through the Experimental Station of Patacamaya, with their material supplied through the Experimental Station of Obonuco (Colombia). The following study was conducted at the Agropecuary Experimental Center of Condori, located 49 km. north of …

Agronomic Evaluation And Comparison Of The Yield Of Six Multiannual Forage Species, Under Dry Land Conditions In The Ingavi Province, Freddy Óscar Paye Paye

Theses and Dissertations

The agronomical evaluation and the comparative work of six multiannual forage species was conducted in the facilities of the Benson Institute, in the community of Contorno de Letanias, Ingavi province, La Paz. The objectives were to evaluate the agronomic behavior, as well as to evaluate the dry matter (DM) yield of six multiannual forage species (grasses) under local conditions, and to determine the partial cost of production of the studied species. The annual mean temperature was 9.14°C, and 517.6 mm of precipitation. The test was conducted under the random block design test, with six different forage species, and three repetitions. …

Evaluación De La Adaptación, Comportamiento Y Efecto En La Pradera De La Acacia Negra (Acacia Decurrens), De La Acacia Japonesa (Acacia Melanoxylon), Y Del Aliso (Alnus Acuminata), Como Cerca Viva En Un Sistema De Producción De Ganado De Leche En El Trópico Alto Colombiano, Luz Angela Florez Muriel, John Alexander Umaña Arboleda

Zootecnia

Se implementó un sistema silvopastoril de cerca viva en la finca Santa Maria en el Municipio de Sopo; para el cual se utilizaron 3 especies, Aliso, Acacia decurrens y Acacia melanoxylon distribuidos en 1536 metros lineales, se utilizo un diseño de bloques al azar y 4 replicas con 7 arreglos, T1 (testigo), T2 (aliso), T3 (Acacia decurrens), T4 (Acacia melanoxylon), T5 (Aliso + Acacia decurrens), T6 (Aliso + Acacia melanoxylon) y T7 (Acacia decurrens + Acacia melanoxylon), se evaluaron el crecimiento y desarrollo de los árboles, medidas dasométricas; presencia e incidencia de plagas y enfermedades; Cambios físico-químicos en el suelo, …

Assessment Of Interactions Amoung Viruses Infecting Sweetpotato, Charalambos D. Kokkinos

LSU Doctoral Dissertations

Viral diseases, especially those caused by mixed infections, are among the economically most important diseases of sweetpotato. Real-time PCR assays were developed for the detection and quantification of the potyviruses Sweet potato feathery mottle virus (SPFMV), Sweet potato virus G (SPVG), Ipomoea vein mosaic virus (IVMV); the crinivirus Sweet potato chlorotic stunt virus (SPCSV), and the begomovirus Sweet potato leaf curl virus (SPLCV) directly from infected sweetpotato plants. Titers of SPFMV, IVMV, and SPVG were lower in singly-infected sweetpotato plants compared to singly-infected plants of the standard indicator host Brazilian morning-glory (Ipomoea setosa) and the standard propagation host I. nil …

Water Stress Vulnerability Of Four Banksia Species In Contrasting Ecohydrological Habitats On The Gnangara Mound, Western Australia, Caroline Canham

Theses : Honours

The distribution of obligate and facultative phreatophytic vegetation reflects the gradient of ecohydrological habitats in a landscape. Preliminary investigations of Banksia vulnerability to xylem embolism have reported that obligate phreatophytes are more susceptible to water stress than facultative phreatophytes (Froend & Drake 2006). A quantitative measure of plant susceptibility to water stress is vital when establishing environmental water requirements. This study investigated interspecific differences in vulnerability to water stress for two facultative phreatophytes (B. attenuata and B. menziesii) and two obligate pln·eatophytes (B. ilicifolia and B. littoralis) at the same position along an ecohydrological gradient on the Gnangara Groundwater Mound, …

The Effects Of Light Reduction Treatments On Mobile Epifaunain An Amphibolis Griffithii (Black) Den Hartog Seagrass Ecosystem, Helen Barwick

Theses : Honours

One of the main anthropogenic disturbances to seagrass meadows in Australia is reduction in light availability, through nutrient enrichment or suspended sediments. Dredging can create suspended sediment plumes from the expulsion of particulates into the water column and in tum reduces light penetration to seagrass ecosystems. Preliminary investigations have demonstrated that light reduction for different intensities and durations results in reduced seagrass and epiphytic algae biomass. The main aim of this study was to determine the effects of different intensities and durations of light reduction on epifaunal assemblages in Amphibolis griffithii seagrass meadows in Jurien Bay, Western Australia. This was …

Localization Of Diplodia Pinea In Diseased And Latently-Infected Pinus Nigra, Jennifer Lee Flowers

University of Kentucky Doctoral Dissertations

Diplodia pinea causes Diplodia tip blight on more than 30 different pine species. During the past 10 years, Diplodia tip blight has emerged as a serious problem in landscape and Christmas tree farms in this region. Surveys of diseased and symptomless Austrian pines revealed that latent infections of symptomless shoots by D. pinea were common. Latent infections may account for the recently observed rapid decline of mildly diseased pines in our region. To investigate the colonization habits of D. pinea within its host, molecular cytology was attempted and traditional histology was performed on naturally infected, diseased and asymptomatic Austrian pine …

Genetic Diversity And Gene Flow In Fragmented Populations Of The Rare Shrub, Calothamnus Sp. Whicher, Sean Stankowski

Theses : Honours

Ca/othamnus sp. Whicher (Myrtaceae) is a narrow range endemic shrub restricted to ironstone soils near the town of Busselton in south-western Australia. Due to extensive land clearing for agriculture and mineral exploration, the species is fragmented over the majority of its range. In the present study, microsatellite markers were used to characterise levels of genetic diversity and describe levels of differentiation and gene flow among seven small, isolated road verge populations. Allelic diversity within the taxon over the six microsatellites was high (A = 17.6 ± 1.6). Diversity within populations was considerably lower (A = 5.19 ± 1.27), …

Pollen Characteristics Of Grevillea Species Determined By In Vitro Germination, Rebecca Parsons

Theses : Honours

Germination of pollen in vitro is a common technique used to assess the ability of pollen to germinate under a variety of conditions. The ability to determine the viability of a pollen grain, and optimal conditions for maximum germination and storage are important for hybridisation. A means of storing pollen, while maintaining viability, enables inter-species hybridisation between species that are spatially and temporally (flowering time) separated. The ultimate aim of hybridisation is seed set and in order to increase this in a genus renowned for a very low fruit to flower ratio, maximum pollen germination must be obtained. Therefore, by …

Energy Value In Llamas (Lama Glama) Fed With Alfalfa Hay (Modicago Sativa) And Barley (Hordeum Vulgare) For Apparent Digestibility In Vivo In The National Camelid Germplasm Bank (Ceac), Edwin Gonzalo Ugarte Huanca

Theses and Dissertations

In this experiment, we used four male llamas that were three to four years of age from the Khara race. They were divided into two ad libitum feeding groups. The digestible energy (ED) was determined using samples that were sent to the laboratory. These samples were derived from a conventional in vivo assay using the method of total fecal collection in order to determine the difference between energy consumed and energy excreted. Metabolizable energy was calculated by deducting digestible energy, energy loss in the urine and energy loss in the gases (methane). Urinary energy was determined through the measurement of …

Evaluation Of The Seed Production Of Tall Grasses Tolerant To Drought And Salinity In The Tamborada Region - Cochabamba, Magali Vallejos Arnez

Theses and Dissertations

This study was conducted on plots established by the Benson Institute in the Tamborada region of Cochabamba, Bolivia. The objective of the study was to evaluate the seed production of tall grasses that are tolerant to drought and salinity. A design of randomized blocks in divided plots with and without fertilizer was used. The results showed that the species with the greatest number of stems and inflorescence was Bromus inermis with 10.9 and 88.67 respectively. It was determined that fertilization has an effect on plant height. Furthermore, the species with the greatest seed yield was Festuca arundinacea with 30.4 kg/ha.