Agriculture Commons^™

The Effect Of Field Pea (Pisum Sativum L.) Companion Crop Management On Red Clover (Trifolium Pratense L.) Establishment And Productivity, Branko Cupina, Dorde Krstic, Aleksandar Mikic, Pero Eric, Savo Vuckovic, Borivoj Pejic

Turkish Journal of Agriculture and Forestry

Field pea (Pisum sativum L.) has the potential to be a suitable companion crop for the establishment of red clover (Trifolium pratense L.), as it is fast growing and is harvested early, and thus reduces the duration of competition and allows light to be transmitted through its canopy to an undersown species more so than other companion crops such as small grains. The aim of this study was to determine the suitability of field pea as a companion crop for red clover, and in particular to determine the effect of pea cultivar and plant population density. The field experiment comprised …

Properties Of Particleboard Produced With Liquefaction-Modified Phenol-Formaldehyde Adhesive, Jung-Uk Lee, Yong-Sung Oh

Turkish Journal of Agriculture and Forestry

Pinus densiflora wood flour was liquefied in the presence of phenol, using sulfuric acid as a catalyst. Liquefaction-modified phenol-formaldehyde (LPF) resins were synthesized as particleboard binder. The physical characteristics of the laboratory-synthesized control PF resin and the LPF resins are described. Laboratory particleboard (PB) was made using Korean hybrid poplar (Populus alba × glandulosa) particles with the control PF resin and LPF resins. The physical strength and dimensional stability of the PBs were tested according to ASTM D 1037-99 and KS F 3104 standard procedures. PB test results show that the physical and mechanical strength properties differed significantly according to …

A New Study On The Bacteria Of Agrotis Segetum Schiff. (Lepidoptera: Noctuidae) And Their Insecticidal Activities, Ali̇ Sevi̇m, Zi̇hni̇ Demi̇rbağ, İsmai̇l Demi̇r

Turkish Journal of Agriculture and Forestry

Agrotis segetum Schiff. (Lepidoptera: Noctuidae) is one of the most serious pests of nearly all vegetables in Turkey. In this study, to find a more effective and safe biological control agent, the bacterial flora of Agrotis segetum were investigated in larvae collected from different populations in the vegetable fields of the Black Sea region of Turkey, and 9 bacterial isolates were cultured from these populations. Seven of these bacteria were determined and characterized at the species level and the rest were characterized at the genus level. Morphological, physiological, and biochemical characteristics of the bacterial isolates were determined by conventional and …

Evaluation Of Late Season Drought Effects On Seed And Oil Yields In Spring Safflower Genotypes, Bahman Pasban Eslam, Hassan Monirifar, Mastaneh Taher Ghassemi

Turkish Journal of Agriculture and Forestry

Seed and oil yields, their components, and the relationships among yield and related traits were measured in 5 spring safflower (Carthamus tinctorius L.) genotypes, Local Arak, Local Esfahan, Sina, KH_{23-57}, and Goldasht, under nonstressed and water deficit conditions imposed from late flowering (80% flowering) to maturity. The studies were conducted in loam soil at the Research Center for Agriculture and Natural Resources of East Azarbaijan, Iran (46°2'E, 37°58'N) during 3 successive years (2005-2007). According to the significant decrease in the number of seeds per capitulum, 1000-seeds weight, harvest index, and seed and oil yields under water deficit conditions, it seems …

Temperature Dependent Development Of The Egg-Larval Parasitoid Chelonus Oculator On The Factitious Host, Ephestia Cautella, Hi̇lal Tunca, Cem Özkan, Ahmet Neşet Kilinçer

Turkish Journal of Agriculture and Forestry

Development, fecundity, and longevity of the egg-larval parasitoid Chelonus oculator Panzer (Hymenoptera: Braconidae) were studied on the factitious host, Ephestia cautella (Walker) (Lepidoptera: Pyralidae) at 4 different temperatures (15 °C, 20 °C, 25 °C, and 30 °C). Developmental time from egg to adult was inversely related to temperature. Egg to adult development time ranged from 188 days at 15 °C to 28 days at 30 °C. Complete development required 489 degree-days with a developmental threshold of 12.5 °C. Adult male and female longevity ranged from 43 days at 20 °C to 17 days at 30 °C. Maximum production of offspring …

Studies On Ecophysiological Responses Of Durum Wheat Genotypes Under Water Deficit Conditions., Ali Akbar Moayedi

Student Works (2010-2019)

Water is the main component in the make-up of plants and serves as the solvent, which transports minerals and dissolved carbohydrates throughout the plant. However, the ecological and physiological responses of plants to water limitation vary at different developmental stages and limits crop production and yield in crops. Therefore, investigation of the plant response to drought at its different developmental stages can be useful to overcome the negative effects of water stress in different plant growth stages. In addition, although, drought stress has been well documented as an effective parameter in decreasing crop production in arid and semi arid regions, …

Streamflow Prediction Using Gis For The Kentucky River Basin, Bakkiyalakshmi Palanisamy

University of Kentucky Doctoral Dissertations

The study was aimed at developing a simple methodology for flow prediction in ungauged basins using existing data resources. For this purpose, the streamflow measurements across the Kentucky River Basin located in Kentucky, USA were obtained from United States Geological Survey (USGS) archive. The flow transferring characteristics of the subbasins of the Kentucky River Basin were obtained by combining downstream and upstream stream gauges. The flow transferring function thus derived were related to watershed, channel and flow characteristics of the subbasins by multiple regression analysis. The gauge pairs were divided into two classes of subbasins representing Upper and Lower Kentucky, …

Evaluation And Enhancement Of Seed Lot Quality In Eastern Gamagrass [Tripsacum Dactyloides (L.) L.], Cynthia Hensley Finneseth

University of Kentucky Doctoral Dissertations

Eastern gamagrass [Tripsacum dactyloides (L.) L.] is a warm-season, perennial grass which is native to large areas across North America. Cultivars, selections and ecotypes suitable for erosion control, wildlife planting, ornamental, forage and biofuel applications are commercially available. Plantings are commonly established from seed; however, seed quality and dormancy are barriers to establishment. The objective here was to investigate parameters that contribute to inconsistent performance of this seed kind to subsequently improve seed lot quality.

Forty-two seed lots were used, with seed fill and germination potential ranging from 78- 100% and 11-91%, respectively. Actual germination and dormant seed ranged …

The Determination Of Pneumatic Conveying Characteristics Of Chickpea, Ahmet Kiliçkan, Meti̇n Güner

Turkish Journal of Agriculture and Forestry

The pneumatic conveying characteristics of chickpea (Cicer arietinum L.) of the variety Koçbasi were determined. The length, width, thickness, arithmetic mean diameter, geometric mean diameter, sphericity, volume, 1000 seed mass, bulk density, true density, porosity, projected area, terminal velocity, drag coefficient, pressure drop, power consumption, and seed damage, namely mechanical damage, germination test, and seed vigour index, were investigated experimentally. The positive low pressure system was used for the conveying of chickpeas. The power requirement and pressure drop were boosted with increasing the revolution of the blower and conveying capacity decreased with increasing pipe diameter. The highest pressure drop and …

A Staining Method For Determining Severity Of Tension Wood, Ayşe Di̇lek Doğu, Michael Grabner

Turkish Journal of Agriculture and Forestry

Tension wood is considered to be an important defect by the wood processing industries. A considerable amount of research has been done to determine the presence and structure of tension wood; however, there is a need to find a quick, practical, and applicable method to evaluate the severity of tension wood. This study investigated whether zinc-chlorine-iodide (Herzberg reagent) could be applied in determination of tension wood severity. Fagus sylvatica L. (beech wood), Populus alba L. (poplar wood), and Quercus robur L. and Quercus rubra L. (oak wood) species were used in this study. The results were compared with safranin/astra blue …

Growth And Yield Of Cultivated Grape With Native Perennial Grasses Nodding Needlegrass Or California Barley As Cover Crops, Michael J. Costello

Wine and Viticulture

Two California native perennial grasses, nodding needlegrass [Nassella cernua (Stebbins & R.M. Love) Barkworth] and California barley [Hordeum brachyantherum Nevski ssp. californicum (Covas & Stebbins) Bothmer, N. Jacobsen & Seberg], were compared with a conventional grass cover crop, ‘Blando’ brome (Bromus hordeaceus L.), as well as resident (weedy) vegetation and a clean cultivated control for effects on growth and yield of cultivated grape (Vitis vinifera L. cv. Barbera). Statistical analyses did not reveal yield differences between treatments with floor vegetation (the native grasses, ‘Blando’ brome, and resident vegetation) and clean cultivation, the cover crop treatments (the native grasses and ‘Blando …

Louisiana Agriculture Winter, 2010, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

Threadfin Shad Impacts Phytoplankton And Zooplankton Community Structures In Channel Catfish Ponds, Bartholomew W. Green, Peter Perschbacher, Gerald Ludwig, Sara E. Duke

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Plankton community structure and chlorophyll a concentration were compared in 12 0.1-ha earthen ponds co-stocked with channel catfish (Ictalurus punctatus Rafinesque, 1818) in multiple-batch culture (initial biomass = 5,458 kg ha^-1) and a planktivore, threadfin shad (Dorosoma petenense Güther, 1867; initial biomass = 449 kg ha^-1), during the April-November growing season. We used a completely randomized design in 2 x 2 factorial arrangement to test planktivore level (presence or absence of threadfin shad) and channel catfish feeding frequency (daily or every 3^rd d). Channel catfish were fed a 32% protein feed to apparent …

Assaying Of Diversity Among Soybean (Glycin Max (L.) Merr.) And Peanut (Arachis Hypogaea L.) Genotypes At Dna Level, Faheem Shehzad Baloch, Cemal Kurt, Hali̇l Hali̇s Arioğlu, Hakan Özkan

Turkish Journal of Agriculture and Forestry

Developing successful strategies to ensure future increase in yield of soybean and peanut crops hinges in part, on improving the genetic basis of the cultivars. Knowledge of genetic relationships in crop breeding programs provides valuable information that can be used by plant breeders as a parental line selection tool. So far, a thorough analysis of genetic diversity among the soybean and peanut genotypes grown in Turkey had not been attempted at DNA level. In this study, inter-simple sequence repeats (ISSR) and sequence-related amplified polymorphism (SRAP) markers were used to evaluate the genetic diversity between 21 soybean and 32 peanut cultivars …

Zinc Alleviates Salt Stress And Increases Antioxidant Enzyme Activity In The Leaves Of Pistachio (Pistacia Vera L. ‘Badami’) Seedlings, Vahid Tavallali, Majid Rahemi, Saeed Eshghi, Bahman Kholdebarin, Asghar Ramezanian

Turkish Journal of Agriculture and Forestry

The mechanism(s) by which Zn alleviates NaCl stress was investigated in Pistacia vera L. 'Badami'. Pistachio seedlings were treated with 0, 800, 1600, 2400, and 3200 mg of NaCl kg^{-1} of soil, along with Zn (0, 5, 10, and 20 mg kg^{-1} of soil). NaCl stress induced high oxidative stress, increasing lipid peroxidation, electrolyte leakage, and lipoxygenase (LOX, E.C. 1.13.11.12) activity to high levels. Zn supplement efficiently reduced all these adverse effects of salt stress. However, there were no significant differences among the above parameters in plants treated with Zn only. NaCl stress significantly increased the activity of antioxidant enzymes. …

Cloning, Characterization, And Expression Of The Gene Encoding Polygalacturonase- Inhibiting Proteins From Strawberry, Yong Zhang, Hao-Ru Tang, Yan-Xia Hou, Hao Jiang, Ya Luo, Jie Zhang

Turkish Journal of Agriculture and Forestry

Polygalacturonase-inhibiting proteins (PGIP) play important roles in the defense against plant pathogens, especially fungi. The sequence of strawberry PGIP gene was obtained using reverse transcription PCR (RT-PCR) and its expression in different tissues was studied by semi-quantitative RT-PCR. A cDNA fragment of FaPGIP gene was cloned and the sequence analysis shows that the fragment contains a full ORF of 999 bp encoding 332 amino acids. The FaPGIP gene from genomic DNA shows a single 168bp intron that is efficiently spliced out of the FaPGIP pre-mRNA transcript. The FaPGIP has a high degree of identity with previously isolated PGIP genes and …

The Influence Of Vernalization Time And Day Length On Flower Induction Of Radish (Raphanus Sativus L.) Under Controlled And Field Conditions, Haluk Çağlar Kaymak, İsmai̇l Güvenç

Turkish Journal of Agriculture and Forestry

This research was carried out to identify an alternative model plant for the study of vernalization among the cultivars that are commonly grown in Turkey and the influence of vernalization and day length on the flowering of radishes (Raphanus sativus L.) under controlled and field conditions throughout 2003, 2004, and 2005. In this study, 6 radish cultivars (Raphanus sativus L. cvs. 'Siyah,' 'Beyaz,' 'Antep,' 'İri Kırmızı,' 'Red Cherry F_1,' and 'Cherry Belle') were used in the laboratory and field experiments as plant material. Under the controlled conditions, 2 day length periods (8 and 16 h light) and 5 vernalization times …

Prey Preference, Interaction With Selected Natural Enemies, And Alternative Nutritional Sources Of The Mirid Bug Dicyphus Tamaninii Wagner, Ihab Ghabeish, Azzam Saleh, Abdulfattah Dababat

Turkish Journal of Agriculture and Forestry

The present study aimed to investigate the prey preference of the omnivorous bug Dicyphus tamaninii Wagner (Heteroptera: Miridae) among 5 different prey species, and its interaction with 3 different natural enemies commonly used in greenhouses. Moreover, the survival duration of the predator was studied in response to different nutritional sources. In multi-choice trials all developmental stages of the predator tested, namely N_3, N_5, and adult female, showed a clear preference for Aphis gossypii Glover over other prey species offered. Nonetheless, a considerable number of Tetranychus urticae Koch, Frankliniella occidentalis (Pergande), and Trialeurodes vaporariorum (Westwood) were also consumed. Myzus persicae (Sulzer) …

The Leaning Object: April 2010, John C. Owens

Leading Object

Perspectives; Costa Rican, IANR officials strengthen ties; Bust honors Morrill, author of land-grant legislation; Unintentional farm policy career is fulfilling; 4-H collaborates with Omaha zoo; Tree planting for Arbor Day; Awards ...OEAs, Holling awards, Outstanding postdoc mentor, Other awards

The Leading Object: May 2010, John C. Owens

Leading Object

Perspectives; NU delegation visits Vietnam; Green to assume vice chancellorship July 19; Pioneer Hi-Bred researcher credits success to ‘solid education’; Presidential nominee has IANR ties; Awards ... Dinsdale and OEA; Water research to ‘jump start’ new center; Entrepreneurship, ag are tour highlights; Death

Nebraska Statewide Forest Resource Assessment & Strategy - 2010, Scott Josiah, John Erixson

Nebraska Forest Service: Publications

This Assessment relies heavily on the input from our partners. To complete the Assessment, we bolstered our own forest resource data with publicly available data from a variety of sources, including the National Land Cover Dataset, USFS Spatial Analysis Project, U.S. Census Bureau, Nebraska Game and Parks Commission, Nebraska Department of Roads, Nebraska Natural Resources Districts and input from many partners. Combined, this information provided us with valuable insights about the nature, complexity and value of our forest resources, and helped us identify priority forest areas across the state.

Using the information from the Assessment, we developed strategic goals based …

Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 11 2010, Several Authors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Contents, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Letter From The Dean, Michael Vayda

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Industry Professionals’ Perceptions Of Crisis Communications Educational Needs For New Professionals And Best Practices For Second Life© Simulations, Kristin M. Pennington, Leslie D. Edgar

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Crises impacting agriculture cost the nation billions of dollars in expenses and lost revenues annually. Organizations and governmental agencies continue to refocus energies on improving crisis communication plans in an effort to lessen economic impacts of unanticipated events. This study brought together an advisory team of agricultural communications professionals to gather perceptions of crisis communications educational needs for new professionals and to identify the best practices for using Second Life© (SL), a 3-D virtual world, simulations for training. Advisory team members represented the human, crop, animal, and environmental sectors of the agricultural industry. Perceptions were gathered during a roundtable, open-ended …

Toxins Reduce Palatability, Usu Extension

All Current Publications

Several years ago we had two research projects we assumed were unrelated. One focused on why goats avoid the current season’s growth of blackbrush and the other on how livestock learn to avoid foods high in toxins.

Rna Interference As A Method For Target-Site Screening In The Western Corn Rootworm, Diabrotica Virgifera Virgifera, Analiza P. Alves, Richard W. Beeman, Marce D. Lorenzen, John E. Foster, Blair D. Siegfried

Department of Entomology: Faculty Publications

To test the efficacy of RNA interference (RNAi) as a method for target-site screening in Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) larvae, genes were identified and tested for which clear RNAi phenotypes had been identified in the Coleopteran model, Tribolium castaneum. Here the cloning of the D. v. vergifera orthologs of laccase 2 (DvvLac2) and chitin synthase 2 (DvvCHS2) is reported. Injection of DvvLac2-specific doublestranded RNA resulted in prevention of post-molt cuticular tanning, while injection of DvvCHS2- specific dsRNA reduced chitin levels in midguts. Silencing of both DvvLac2 and DvvCHS2 was confirmed by RT-PCR and quantitative RT-PCR. As in T. …

Nitrogen And Water Stress Impacts Hard Red Spring Wheat (Triticum Aestivum) Canopy Reflectance, Cheryl L. Reese, Daniel Long, David Clay, Sharon Clay, Dwayne Beck

Agronomy, Horticulture and Plant Science Faculty Publications

Remote sensing has been proposed as a method for implementing an inseason spring wheat (Triticum aestivum) nitrogen (N) fertilization program. However, in fields where yields are influenced by both water and N stress, accurate N recommendations require that that the N and water stress signals be separated from each other. The objective of this study was to determine the impact of water and N stress on canopy reflectance and the ability of vegetation (NDVI, GNDVI, and BNDVI), and chlorophyll (CGreen and CRedEdge) indices to separate water and N stress. A split-plot experiment containing four blocks was conducted in 2002, 2003, …

Do The Poor Pay More For Healthy Food? An Empirical Economic Analysis, Patrick Lee Hatzenbuehler

LSU Master's Theses

The economic question this study seeks to answer is why healthier food products are less expensive in some stores than in others and in some neighborhoods than others. The analysis builds upon the precedent of past retail food pricing studies that have been conducted in Southeastern Louisiana and in other parts of the country, by further examining disparities of retail food costs across store formats and neighborhoods with different demographic compositions. It utilizes a comparison of a general market basket of food items used in past studies and a "representative" market basket that is regionally specific to Southeastern Louisiana to …

Riparian Conundra, David Weaver

Conference papers and presentations

Riparian vegetation is established or restored on the basis that it physically filters and traps hillslope derived particulate nutrients in surface runoff. Whilst many studies support this conventional model of riparian function, few test this models embedded assumptions. The assumptions are that catchments are surface runoff dominated, that most surface derived nutrients are transported in particulate form, and that riparian management targets locations that will result in the greatest change in water quality. This paper reviews studies in south west Western Australia that challenge these assumptions. Plots measuring leaching and runoff of nutrients showed that 20 times more water and …