Agronomy and Crop Sciences Commons^™

Detection And Measurement Of Water Stress In Vegetation Using Visible Spectrum Reflectance, Arthur Zygielbaum

Department of Geography: Dissertations, Theses, and Student Research

At any scale, from a single microbe to the planet that nurtures us, water defines our place in the universe. It provides the hydraulic forces needed to give plants structure, and the medium enabling photosynthesis, the basis for most life on Earth, to occur. Knowledge of plant water status is vital to understanding the state or condition of vegetation, information which is essential to disciplines as diverse as agriculture, geography, and climatology. Non-destructive and remote sensing of plant water status allows the gathering of such information across wide geographic extents and over long periods of time. Monitoring vegetation remotely requires …

Arkansas Corn And Grain Sorghum Performance Tests 2009, D. G. Dombeck, R. D. Bond, I. L. Eldridge, R. M. Pryor

Arkansas Agricultural Experiment Station Research Series

Corn and grain sorghum performance tests are conducted each year in Arkansas by the University of Arkansas Division of Agriculture. The tests provide information to companies marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating recommendations for producers.

Herbicide, Salinity, And Flooding Tolerance Of Foxtail Barley (Hordeum Jubatum L.) And Desirable Pasture Grasses, Karl R. Israelsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research trials performed in the greenhouse compared the tolerance and response of Hordeum jubatum and desirable pasture grass species to herbicides, salinity, and flooding. Desirable grass species used in this study included: 'Fawn' tall fescue (Festuca arundinaceae), 'Garrison' creeping foxtail (Alopecurus arundinaceus), 'Palaton' reed canarygrass (Phalaris arundinacea), 'Climax' timothy (Phleum pratense), 'Alkar' tall wheatgrass (Thinopyrum ponticum), 'Potomac' orchardgrass (Dactylis glomerata), and 'Mustang' altai wildrye (Leymus angustus). Tolerance to herbicides, salinity, and flooding varied significantly among grass species. Herbicide tolerance was tested using four herbicides at five …

Baird, Henry Herring, 1902-1991 - Collector (Mss 279), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Collection 279. Account books and other financial records related to Jenkins-Ryan Tobacco Company of Adairville, Kentucky. Also includes financial records associated with the farms and businesses operated by Thomas Henry Baird, Jr., as well as the 1941 monthly financial reports and a label from Scott Tobacco Company of Bowling Green, Kentucky.

Annis, Lena Grey, 1897-1996 - Collection (Mss 275), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Collection 275. Letters sent to Lena Grey Annis from family members and friends, chiefly related to farm and family life in Butler County, Kentucky in the mid-to-late-twentieth century.

Identifying Sub-Tropical Grass Seedlings, Brad Wintle, Geoff Moore, Phil Nichols

Bulletins 4000 -

There is considerable interest in growing sub-tropical (or warm season) perennial grasses for out-of-season green feed, especially on the south coast and in the northern agricultural region (NAR). They consist of two types: creeping grasses, which spread by either above ground runners (stolons) or below ground runners (rhizomes) and bunch grasses, which are tufted and do not spread by runners.

The main species sown include Panic grass, Rhodes grass, Kikuyu, Setaria, Signal grass, Digit grass, and Bambatsi panic and are often sown as a mixture, comprising 2 or more species. This bulletin describes how to identify these grasses at the …

Effect Of Different Schedules Of Baby Corn (Zea Mays L.) Harvests On Baby Corn Yield, Grain Yield, And Economic Profit Value, Zheng Wang

Masters Theses & Specialist Projects

Maize (Zea mays L.) ranks third as a food crop after wheat and rice and is characterized not only as a cereal crop but also as a vegetable. Maize used as a vegetable is known as “baby corn”. Baby corn consists of unfertilized young ears harvested 2 or 3 days after silk emergence. The present study was implemented in 2009 at Western Kentucky University Agriculture Research and Education Center (36.93 N, 86.47 E) in Bowling Green, Kentucky. The purpose of the study was to compare the effect of different schemes of harvest on baby corn (BC) yield, grain maize (GM) …

Can R&D Investment Offset The Negative Impact Of Climate Change On Agricultural Productivity?, Nazrul Islam, Ruhul A. Salim

Climate Science Published Reports

Productivity growth in agriculture helps maintain the nation's economic prosperity. However, long-run productivity growth in agriculture faces several challenges such as the potential worsening of climate due to global warming and the loss of productive land due to land use competition, salinity, wind erosion and soil acidity. Strategic policy making and appropriate funding for sustained productivity growth in agriculture is therefore crucial.

Research and development (R&D) to drive innovation is an acknowledged main source of productivity growth. The development and application of technologies generated through R&D boosts agriculture's productivity. Agricultural R&D activities in Australia and in most other developed economies …

No-Till Tomato Production, Bradley L. Booker

Master's Theses

Tillage increases erosion rates and diminishes the quality of soils but has traditionally been a way to manage weeds and prepare a seedbed. No-till vegetable production can ameliorate the ill-effects of tillage in an economically effective way but has not been studied much in California. The objective of this thesis was to determine the viability of no-till vegetable cropping on the Central Coast of California. Tomatoes were grown in no-till and conventionally tilled treatments. Total yield, fruit weight, weed emergence, soil bulk density, soil aggregate stability, and soil organic carbon content were measured and compared. Yields and soil tests in …

Corn Response To Competition: Growth Alteration Vs. Yield Limiting Factors, Sharon A. Clay, David E. Clay, D. P. Horvath, J. Pullis, C. Gregg Carlson, Stephanie A. Hansen, Graig Reicks

Agronomy, Horticulture and Plant Science Faculty Publications

Competition mechanisms among adjacent plants are not well understood. This study compared corn growth and yield responses to water, N, and shade at 74,500 plants ha⁻¹ (1×) with responses to water and N when planted at 149,000 plant ha⁻¹ Plant biomass, leaf area, chlorophyll content, reflectance, and enzyme expression (transcriptome analysis) were measured at V-12. Grain and stover yields were measured with grain analyzed for ¹³C isotopic discrimination (Δ) and N concentration. At V-12, 60% shade plants had increased chlorophyll and reduced leaf area and height compared to full sun plants. In the 2× treatment, plants had …

Corn And Soybean Profitability 2010, Gregory S. Halich

Agricultural Economics Presentations

No abstract provided.

Grain Market Outlook, Cory G. Walters

Agricultural Economics Presentations

No abstract provided.

Wheat (Triticum Aestivum) Nam Proteins Regulate The Translocation Of Iron, Zinc, And Nitrogen Compounds From Vegetative Tissues To Grain, Brian M. Waters, Cristobal Uauy, Jorge Dubcovsky, Michael A. Grusak

Department of Agronomy and Horticulture: Faculty Publications

The NAM-B1 gene is a NAC transcription factor that affects grain nutrient concentrations in wheat (Triticum aestivum). An RNAi line with reduced expression of NAM genes has lower grain protein, iron (Fe), and zinc (Zn) concentrations. To determine whether decreased remobilization, lower plant uptake, or decreased partitioning to grain are responsible for this phenotype, mineral dynamics were quantified in wheat tissues throughout grain development. Control and RNAi wheat were grown in potting mix and hydroponics. Mineral (Ca, Cu, Fe, K, Mg, Mn, P, S, and Zn) and nitrogen (N) contents of organs were determined at regular intervals to …

Summaries Of Arkansas Cotton Research 2008, Derrick M. Oosterhuis

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Greer, James Francis, 1797-1871 (Sc 2044), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid and scan (Click on "Additional Files" below) for Manuscripts Small Collection 2044. Letter, 10 September 1861, from James Greer in Bloomfield, Nelson County, Kentucky, to A. H. Patch, Louisville, Kentucky. Greer reports unfavorably on his trial of a mower for harvesting crops.

Warren County (Kentucky) Strawberry Growers' Association (Sc 2014), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid and scan (Click on "Additional Files" below) for Manuscripts Small Collection 2014. Minute book, 1912-1915, by-laws, articles of incorporation, financial statements, and correspondence for the Association, as well as sundry receipts.

Impact Of Weed Management Practices On Grapevine Growth, Yield Components, Plant And Arthropod Abundance, And Carabid Seed Predation In Paso Robles Vineyard, Paolo Sanguankeo

Master's Theses

In the Central Coast of California, USA, wine grape growers are making efforts to identify weed control practices that promote biodiversity in their vineyards while maintaining yields. A field study was conducted in Paso Robles, CA in 2006 and 2007 evaluating the effect on Zinfandel grape-vine growth and production, groundcover plant, and ground dwelling arthropod communities of five weed control practices: 1) flumioxazin, 2) simazine, 3) cultivation, 4) cover crop, and 5) untreated control.

The herbicide treatments had the lowest weed biomass followed by the cultivation, being approximately 10 and 2 times lower than the weed biomass of either the …

Effect Of Water On Micronutrient Content And Yield In Rice (Oryza Sativa L.), Sheila Lorraine Baker

Master's Theses

Rice (Oryza sativa L.) is an important crop in many countries. According to the IRRI, more than 2 billion people globally depend on rice as a staple food (Dawe, et al. 2003). Studies on micronutrient content in rice and the effect of water in availability of the nutrients may aid in decreasing global nutrient deficiencies. Rice is grown under different water regimes such as AWD and intermittent flooding, sprinkler and furrow irrigation. A greenhouse pot experiment of rice utilizing a split plot design under different water regimes was conducted to assess the affect of water on (1) DTPA extractable soil …

Sugar Creek Creamery Company - Louisville, Kentucky (Sc 1976), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid and scan (Click on "Additional Files" below) for Manuscripts Small Collection 1976. Letter from Sugar Creek Creamery Company, Louisville, Kentucky, soliciting cream for manufacture of Sugar Creek butter.

Experiencia De Productoras Con El Uso De Harina De Sorgo: Por Años El Cultivo Del Sorgo Ha Sido Utilizado Para El Consumo Humano Y Animal, Roxana Ortiz, Eduardo Funes

INTSORMIL Impacts and Bulletins

En marzo del año pasado, la industria panifi cadora experimento los precios altos que sufrió la harina de trigo y en la búsqueda de nuevas alternativas algunos de ellos se interesaron en el uso de harina de sorgo para elaborar pan dulce y bebidas étnicas.

Es así que el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA) a través del Laboratorio de Alimentos impulsa esta tecnología. El interés de probar nuevas opciones llevo a muchas Panaderías, Asociaciones de Productoras, ONG, Industrias de Alimentos, Fundaciones y otras a capacitarse en el uso de esta harina.

Effect Of Environmental Density And Buoyancy On Growth And Gravitropic Response In Maize Roots, Jessy Robbins

All-Inclusive List of Electronic Theses and Dissertations

The mechanism by which plants sense gravity is not fully understood. The statolith theory states that plants sense gravity based on the sedimentation of starch granules called statoliths. However, not all plants contain statoliths. The hydrostatic model was proposed to explain gravitropic sensing in systems which lack statoliths. This model states that the gravity sensor in a plant cell is the entire protoplast; gravitropic sensing depends on the buoyancy of the protoplast relative to the density of its external environment. The ability of maize roots to sense gravity when grown in media of differing densities is examined in these studies. …

An Integrated Crop- And Soil-Based Strategy For Variable-Rate Nitrogen Management In Corn, Darrin F. Roberts

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Nitrogen (N) management in cereal crops has been the subject of considerable research and debate for several decades. Historic N management practices have contributed to low nitrogen use efficiency (NUE). Low NUE can be caused by such things as poor synchronization between soil N supply and crop demand, uniform application rates of fertilizer N to spatially variable landscapes, and failure to account for temporally variable influences on soil N supply and crop N need. Active canopy reflectance sensors and management zones (MZ) have been studied separately as possible plant- and soil-based N management tools to increase NUE. Recently, some have …

Arkansas Small-Grain Cultivar Performance Tests 2008-2009, J. T. Kelly, T. S. Rainey, R. K. Bacon, E. A. Milus

Arkansas Agricultural Experiment Station Research Series

Small-grain cultivar performance tests are conducted each year in Arkansas by the Arkansas Agricultural Experiment Station, Department of Crop, Soil, and Environmental Sciences. The tests provide information to companies developing cultivars and/or marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating cultivar recommendations for smallgrain producers.

Estimating Water Application Efficiency For Drip Irrigation Emitter Patterns On Banana, Alisson Jadavi Pereira Da Silva, Eugênio Ferreira Coelho, Jarbas Honorio De Miranda, Stephen Ray Workman

Biosystems and Agricultural Engineering Faculty Publications

The objective of this work was to evaluate root and water distribution in irrigated banana (Musa sp.), in order to determine the water application efficiency for different drip irrigation emitter patterns. Three drip emitter patterns were studied: two 4-L h^-1 emitters per plant (T1), four 4-L h^-1 emitters per plant (T2), and five 4-L h^-1 emitters per plant (T3). The emitters were placed in a lateral line. In the treatment T3, the emitters formed a continuous strip. The cultivated area used was planted with banana cultivar BRS Tropical, with a 3-m spacing between rows and a …

An Integrated Approach To Model The Establishment, Water Use And Growth Of New Perennial Pasture Species, Lalith D B Suriyagoda, M H. Ryan, Daniel Real, Hans Lambers, Michael Renton

Conference papers and presentations

Perennial pastures increase the sustainability of Australian cropping systems by increasing out of season water use, improving ground cover and helping to avoid dryland salinity. Medicago sativa (lucerne) is the most common perennial legume pasture and is adapted to a wide range of environments, but it does not persist well in areas with acid soils or low summer rainfall (Cocks 2001). Under these scenarios, native herbaceous perennial legumes, such as Cullen australasicum (Cocks 2001), and the exotic perennial pasture legume Bituminaria bituminosa var. albomarginata (common name albo-tedera) are potential alternatives to the currently limited perennial forage options. However, the growth …

B. R. Wells Rice Research Studies 2008, R. J. Norman, J. F. Meullenet, K. A. K. Moldenhauer

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Plant Growth Regulator Sprays And Girdling: Potential Horticultural Techniques To Increase Fruit Retention And Yield Of Longan (Dimocarpus Longan Lour.) Trees In California, Leila Anne Graves

Master's Theses

Abstract Plant Growth Regulator Sprays and Girdling: Potential Horticultural Techniques to Increase Fruit Retention and Yield of Longan (Dimocarpus longan Lour.) Trees in California Leila Graves June 2009 The longan is a subtropical fruit tree whose popularity is growing quickly among American consumers, and thus, could become a lucrative niche market for California growers. Trees planted as part of an initial variety trial conducted in commercial California orchards are beginning to bear fruit. However, fruit retention and yields are low due to excessive abscission during early fruit set. Horticultural techniques, such as plant growth regulator (PGR) sprays and girdling, often …

Usan Sorgo Para Hacer Pan: El Centa Capacita A Panifi Cadores Para Usar Esa Materia Prima, Roxana Ortiz

INTSORMIL Impacts and Bulletins

En marzo del año pasado, la industria panifi cadora experimento los precios altos que sufrió la harina de trigo. En la búsqueda de nuevas alternativas, algunos productores se interesaron en el uso de harina de sorgo para elaborar pan dulce y bebidas étnicas.

Por esa razón, el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA), a través del laboratorio de alimentos, impulsa esta tecnología.

Promueven Ventajas Nutritivas Del Sorgo: La Harina De Este Cereal Es Utilizada Para Elaborar Diversos Productivos Alimenticios, Roxana Ortiz

INTSORMIL Impacts and Bulletins

Horchata, tiste, atoles saborizados, poleadas, pudín, harina de afrecho, pan francés y dulce son productos elaborados a base de sorgo o maicillo y son mezclados con otros ingredientes, técnica impulsada por especialistas del laboratorio de alimentos del Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA).

El proceso consiste en usar la harina sola de sorgo (100%) y mezclarla con otros cereales, rostizando el grano para la elaboración de bebidas o molido en seco para el desarrollo de otros productos.

Exporting Vegetables In Bulk : Reducing Supply Chain Costs Without Compromising Quality, Helen Ramsey, Dennis Phillips

Bulletins 4000 -

Increased competition, a strong Australian dollar and increased production costs have seen Australian grown vegetables steadily lose their share in traditional export markets.

As competition increases, we need to investigate production and handling techniques that improve our price and quality competitiveness.

Improving the effi ciency of the supply chain to export markets is one way Australian growers can reduce production and shipping costs and improve product quality.