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2005

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Articles 331 - 360 of 368

Full-Text Articles in Agriculture

Influence Of Seed Development And Seed Position On Oil, Fatty Acids And Total Tocopherol Contents In Sunflower (Helianthus Annuus L.), Hasan Baydar, Sabri̇ Erbaş Jan 2005

Influence Of Seed Development And Seed Position On Oil, Fatty Acids And Total Tocopherol Contents In Sunflower (Helianthus Annuus L.), Hasan Baydar, Sabri̇ Erbaş

Turkish Journal of Agriculture and Forestry

Sunflower (Helianthus annuus L.) is one of the most important oil crops in the world due to its excellent oil quality. This research was conducted to evaluate changes in the contents of oil, fatty acids and total tocopherol of sunflower seeds obtained from different maturity stages and positions on the head. The heads were harvested sequentially 10, 15, 20, 25, 30, 35, 40, and 45 days after flowering (DAF) in 2002 and 2003. The oil content of sunflower seeds increased significantly with seed development, reaching a maximum value of 45.8% at 35 DAF in 2002 and 47.9% at 30 DAF …

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Effects Of Explant Types And Different Concentrations Of Sucrose And Phytoharmones On Plant Regeneration And Hypericin Content In Hypericum Perforatum L., Ali̇ Kemal Ayan, Cüneyt Çirak, Kudret Kevseroğlu, Atalay Sökmen Jan 2005

Effects Of Explant Types And Different Concentrations Of Sucrose And Phytoharmones On Plant Regeneration And Hypericin Content In Hypericum Perforatum L., Ali̇ Kemal Ayan, Cüneyt Çirak, Kudret Kevseroğlu, Atalay Sökmen

Turkish Journal of Agriculture and Forestry

Hypericum perforatum L. is a medicinal perennial known as "St. John's wort" in Western Europe and used in the treatment of mild to moderate depression. Hypericin, a dianthrone red pigment, is considered responsible for reversing the depression symptoms. The goal of this study was to produce this pigment via micropropagation and thereby describe a suitable micropropagation method for this plant. To achieve this objective, leaf discs and stem segments were cultured on Murashige and Skoog (MS) medium supplemented with kinetin and 2,4-dichlorophenoxyacetic acid (0.5, 1 and 1.5 mg l^{-1}) and sucrose concentrations (30, 40 and 50 g l^{-1}) in darkness …

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Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya Jan 2005

Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya

Turkish Journal of Agriculture and Forestry

Concentrations of indole-3-acetic acid (IAA), gibberellic acid (GA_3) and abscisic acid (ABA) were measured by gas chromatography (GC) in the berries of 3 grape cultivars having different berry set mechanisms to elucidate the possible relationship between endogenous hormones and berry set mechanisms. The results obtained showed that the levels of IAA, GA_3 and ABA in seeded Italia, empty seeded Çavuş and stenospermocarpic seedless Perlette changed during ripening. While Italia exhibited a hormonal pattern similar to that of Çavuş, Perlette showed a different IAA and ABA pattern compared to the other cultivars. Generally, IAA and GA_3 were high in the early …

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Development Of A Method For Priority Setting In Forestry Research Projects In Turkey, İsmet Daşdemi̇r Jan 2005

Development Of A Method For Priority Setting In Forestry Research Projects In Turkey, İsmet Daşdemi̇r

Turkish Journal of Agriculture and Forestry

This paper deals with the priority-setting problem in public research projects in the Turkish forestry sector. For this aim, a combined method has been developed, that is scientific, objective, dynamic, consistent, multidimensional, easily applicable and understandable. The theoretical framework, peculiarities and criteria of the method and weighting of the criteria are explained. Assuring hierarchical multidimensional consistency between the purposes and priorities in the national and sectoral plans with the priorities of forestry research projects was followed for selecting the criteria and weighting them. This method was suggested to the Ministry of Environment and Forestry and its application was implemented through …

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Effects Of Some Soil Properties On The Growth Of Hybrid Poplar In The Terme-Gölardı Region Of Turkey, Aydin Tüfekçi̇oğlu, Lokman Altun, H. Zeki̇ Kalay, Murat Yilmaz Jan 2005

Effects Of Some Soil Properties On The Growth Of Hybrid Poplar In The Terme-Gölardı Region Of Turkey, Aydin Tüfekçi̇oğlu, Lokman Altun, H. Zeki̇ Kalay, Murat Yilmaz

Turkish Journal of Agriculture and Forestry

In this study, the effects of some physical and chemical soil properties on the growth of hybrid poplar were investigated in the Terme-Gölardı region where a poor growth of trees was observed. Soil samples were taken from both poor and good growth areas. Chemical soil properties such as pH, exchangeable Na^+, K^+, Ca^{++} and Mg^{++} content, CEC, phosphorus content and salinity were determined. Physical soil properties such as field capacity, permanent wilting point, water holding capacity and available water were measured. Ground water depth was measured in the field during soil sampling. Clay and Mg++ content and pH of the …

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Effects Of Mimosa Bark Usage On Some Properties Of Particleboard, Gökay Nemli̇, Gürsel Çolakoğlu Jan 2005

Effects Of Mimosa Bark Usage On Some Properties Of Particleboard, Gökay Nemli̇, Gürsel Çolakoğlu

Turkish Journal of Agriculture and Forestry

The objective of this study was to determine the effect of mimosa bark usage on the formaldehyde emission, physical and mechanical properties of particleboard. Fifteen panels from black locust (Robinia pseudoacacia L.) wood containing mimosa bark in a core layer at different ratios were manufactured. Three boards without bark addition were produced as control boards. Formaldehyde emission, modulus of rupture, modulus of elasticity, internal bond strength and thickness swelling of the specimens were tested. It was found that panels made from black locust wood had the highest mechanical properties while panels containing mimosa bark had the lowest. Bark usage significantly …

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Comparison Of Parameter Estimation Methods For The Three-Parameter Generalized Pareto Distribution, Teki̇n Özteki̇n Jan 2005

Comparison Of Parameter Estimation Methods For The Three-Parameter Generalized Pareto Distribution, Teki̇n Özteki̇n

Turkish Journal of Agriculture and Forestry

The generalized Pareto distribution, which is a special case of both exponential and Wakeby distribution, has good potential for the analysis of flood peaks because of its inherent properties. In this paper, the parameter estimation methods of the moments, probability-weighted moments, maximum likelihood, principle of maximum entropy, and least squares to estimate the parameters in the three-parameter generalized Pareto distribution are compared. The usefulness and applicability of each method is discussed by application to observed annual discharge data for 50 different rivers, most of them in Turkey. The comparisons are based on the ability of each method to predict the …

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Comparison Of Decomposition Rates Of Beech (Fagus Orientalis Lipsky) And Spruce (Picea Orientalis (L.) Link) Litter In Pure And Mixed Stands Of Both Species In Artvin, Turkey, Temel Sariyildiz, Aydin Tüfekçi̇oğlu, Mehmet Küçük Jan 2005

Comparison Of Decomposition Rates Of Beech (Fagus Orientalis Lipsky) And Spruce (Picea Orientalis (L.) Link) Litter In Pure And Mixed Stands Of Both Species In Artvin, Turkey, Temel Sariyildiz, Aydin Tüfekçi̇oğlu, Mehmet Küçük

Turkish Journal of Agriculture and Forestry

The decomposition of spruce, beech and mixed litters of spruce and beech was investigated over 3.5 years in beech, spruce and mixed (beech/spruce) stands using less than 1.5 mm mesh litter bags. Initially, carbon, nitrogen, lignin and cellulose concentrations, and C:N and lignin:N ratios were determined in beech and spruce litters. For all sampling intervals, mixed litters showed higher decay rates than individual beech and spruce litters in both pure stands and mixed stands. Spruce decomposed more rapidly than beech, and initial lignin concentration explained most of the variation in decomposition rates between beech and spruce. However, differences in decomposition …

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Soil Erosion Risk Assessment Of The Gölbaşı Environmental Protection Area And Its Vicinity Using The Corine Model, Orhan Dengi̇z, Suat Akgül Jan 2005

Soil Erosion Risk Assessment Of The Gölbaşı Environmental Protection Area And Its Vicinity Using The Corine Model, Orhan Dengi̇z, Suat Akgül

Turkish Journal of Agriculture and Forestry

The main objective of this study was to determine the soil erosion risk in Gölbaşı Environmental Protection Area and its vicinity using the CORINE model. The model consists of 6 steps, each of which using different overlaying combinations of soil texture, depth, stoniness, climatic data, land use and land cover information. In the first step, soil texture, depth and stoniness layers were extracted from a 1:25,000 scaled digital soil map and overlaid to form a soil erodibility map. Secondly Fournier and Bagnouls-Gaussen aridity indexes calculated from the climatic data were used to form the erosivity layer of the study area. …

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A New Method For The Detection Of Minor Populations Of Citrus Tristeza Virus Strains Infecting Single Citrus Trees, Hani̇fe Genç Jan 2005

A New Method For The Detection Of Minor Populations Of Citrus Tristeza Virus Strains Infecting Single Citrus Trees, Hani̇fe Genç

Turkish Journal of Agriculture and Forestry

Fifteen different biologically important citrus tristeza virus (CTV) isolates (B14, B15, B23, B31, B52, B57, T36, D9, D10, D11, D12, D15, D16, D20 and D32) were tested using strain-specific biotin-labeled oligonucleotide probes. Coat protein genes (CPGs) of the samples were amplified by PCR, and the products were hybridized with probes (direct PCR hybridization (DPH)) and sequenced. In the DPH, all samples having probe 0 reactions were infected with CTV. Some isolates giving more than one specific probe reaction showed that they may be infected by mixtures of different CTV strains. In order to investigate this, CPGs from individual bacterial colonies …

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Effects Of Different Tire Configurations On Tractor Performance, Sarp Korkut Sümer, Alaetti̇n Sabanci Jan 2005

Effects Of Different Tire Configurations On Tractor Performance, Sarp Korkut Sümer, Alaetti̇n Sabanci

Turkish Journal of Agriculture and Forestry

The effects of tire ply constructions (radial and bias) and tire arrangements (singles and duals on rear the axle) on tractor performance were evaluated for 2 gear levels on 2 different fields covered with wheat stubble and having different soil types, clay and sandy-loam. For this purpose, the tractor's overall efficiency, specific fuel consumption, and slip values were determined using parameters measured in the study. The results showed that the use of radial tires provided some advantages. For example, overall tractor efficiency with radial tires instead of bias tires increased by 3.44%, while specific fuel consumption decreased by 3.08% on …

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Fifth Year Performance Of Morphologically Graded Cedrus Libani Seedlings In The Central Anatolia Region Of Turkey, Akkin Semerci̇ Jan 2005

Fifth Year Performance Of Morphologically Graded Cedrus Libani Seedlings In The Central Anatolia Region Of Turkey, Akkin Semerci̇

Turkish Journal of Agriculture and Forestry

The effects of morphological characteristics on seedling performance were studied in Cedrus libani seedlings at 3 locations in the Central Anatolia region of Turkey. Some 2+0 seedlings were morphologically graded according to height and root collar diameter sizes. The seedlings were divided into 5 height categories and each height category was divided into small and large root collar diameter subcategories. The morphologically graded seedlings were planted at 3 locations. After 5 growing seasons, the mean survival of the seedlings planted in Ankara, Eskişehir and Konya locations was 84.4%, 77.9% and 54.7%, respectively. The mean height of seedlings planted in Ankara, …

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The Effects Of Joint Forms (Shape) And Dimensions On The Strengths Of Mortise And Tenon Joints, Ali̇ Naci̇ Tankut, Nurgül Tankut Jan 2005

The Effects Of Joint Forms (Shape) And Dimensions On The Strengths Of Mortise And Tenon Joints, Ali̇ Naci̇ Tankut, Nurgül Tankut

Turkish Journal of Agriculture and Forestry

Until recently, detailing of joints was largely a matter of tradition, based on trial and error methods. However, in the engineering design of furniture, it is necessary for designers to create joints with a specified strength. This study was undertaken accordingly, to obtain the strength of round tenon/round mortise, rectangular tenon/rectangular mortise and rectangular tenon/round mortise joints assembled under nominally identical conditions with different end configurations. In addition, each end configuration was compared at rail widths, each with 2 widths of tenon. The results showed that rectangular end mortise and tenons are about 15% stronger than both round end mortise …

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The Effect Of Crop Losses During Pre-Harvest And Harvest Periods On Production Costs In Tomato Production In The Ayaş And Nallıhan Districts Of Ankara Province, F. Füsun Tatlidi̇l, Taner Kiral, Erdemi̇r Gündoğmuş, Hali̇l Fi̇dan, Duygu Aktürk Jan 2005

The Effect Of Crop Losses During Pre-Harvest And Harvest Periods On Production Costs In Tomato Production In The Ayaş And Nallıhan Districts Of Ankara Province, F. Füsun Tatlidi̇l, Taner Kiral, Erdemi̇r Gündoğmuş, Hali̇l Fi̇dan, Duygu Aktürk

Turkish Journal of Agriculture and Forestry

The aim of this research was to analyze the impact on unit crop cost of crop losses that occur during the pre-harvest and harvest periods. It is understood today that crop losses occurring during these periods have an impact on crop cost and a negative effect on profit. The Ayaş and Nallıhan districts of Ankara province, where tomato production is carried out intensively, were selected as the research areas. Dwarf tomatoes are grown in the Ayaş district and indeterminate tomatoes in the Nallıhan district. A sample size of 74 for Ayaş and 34 for Nallıhan was calculated using a simple …

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Wagin-Woodanilling (Zone 5) : Catchment Appraisal 2005, K Ohlsen, T Schulz, T W. Mathwin, Gina Pemberton, Henry Brockman, J Firth, Mitchell Davies, Heather M. Percy Jan 2005

Wagin-Woodanilling (Zone 5) : Catchment Appraisal 2005, K Ohlsen, T Schulz, T W. Mathwin, Gina Pemberton, Henry Brockman, J Firth, Mitchell Davies, Heather M. Percy

Resource management technical reports

The aim of this report is to assess the current extent of salinity and other natural resource degradation issues and provide landholders with the best current management options to address natural resource management issues and enhance sustainable agricultural production.

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Guide To Growing Summer Grain & Forages In The South Coast Region, Western Australia, Andrea Hills, Sally-Anne Penny Jan 2005

Guide To Growing Summer Grain & Forages In The South Coast Region, Western Australia, Andrea Hills, Sally-Anne Penny

Agriculture reports

Growing summer grain and forages in the south coast region of Western Australia. Information is included for sorghum, millet family, sunflowers, and safflower.

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Groundwater Study Of The Boddington Townsite, Gregory Paul Raper Jan 2005

Groundwater Study Of The Boddington Townsite, Gregory Paul Raper

Resource management technical reports

A study of the groundwater beneath the Boddington townsite was carried out in April 2002. The aim was to assess the salinity risk to the townsite infrastructure and to accelerate the implementation of effective salinity management for the town. The study consisted of field reconnaissance, a drilling program, expansion of a groundwater-monitoring network installed in March 2001, and groundwater monitoring.

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An Inventory Of Rangelands In Part Of The Broome Shire, Western Australia, W E. Cotching Jan 2005

An Inventory Of Rangelands In Part Of The Broome Shire, Western Australia, W E. Cotching

Technical Bulletins

The inventory of rangelands in part of the Broome Shire in Western Australia was undertaken by DAFWA between 1989 and 1990. It describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The survey of part of the Broome Shire …

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Silcrete Hardpan In The North-Eastern Wheatbelt : Hydrological Implications For Oil Mallees, D L. Bennett, Russell Speed, Adrian Goodreid, Peter Taylor Jan 2005

Silcrete Hardpan In The North-Eastern Wheatbelt : Hydrological Implications For Oil Mallees, D L. Bennett, Russell Speed, Adrian Goodreid, Peter Taylor

Resource management technical reports

Silcrete is a brittle, intensely indurated rock comprising primarily quartz grains cemented with siliceous allophane. It occurs at 1.5 to 7 metres deep and is often several metres thick and extremely hard, requiring excavation. This Report discusses the extent of silcrete layers in the north-eastern wheatbelt area of Western Australia, the effects of silcrete on water absorption by the soil, and the effects of this physical obstacle on the growth and expansion of oil mallee trees of the region.

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Managing Grey Clays : To Maximise Production And Sustainability, Greg Hamilton, Peter Fisher, Matt Baimbridge, Jennifer Bignell, Jessica Sheppard, Rod Bowey Jan 2005

Managing Grey Clays : To Maximise Production And Sustainability, Greg Hamilton, Peter Fisher, Matt Baimbridge, Jennifer Bignell, Jessica Sheppard, Rod Bowey

Bulletins 4000 -

This bulletin discusses the identification, understanding and management of grey clay soils in the south-west of Western Australia.

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Economic Evaluation Of Potential Changes In Farm Program Price Support For Typical Louisiana Rice And Cotton Farming Operations, Manuel E. Aldana Jan 2005

Economic Evaluation Of Potential Changes In Farm Program Price Support For Typical Louisiana Rice And Cotton Farming Operations, Manuel E. Aldana

LSU Master's Theses

Increased government deficit has led the congress to reduce federal spending. Proposed budget cuts are intended to decrease government spending in several areas, including agriculture. Reductions in farm program spending could cause significant adverse effects on the financial situation of many farms, particularly to rice and cotton enterprises, due to their high reliance on farm program payments as a source of income. Representative rice and cotton operations of one, two, three, and four entities as single crop enterprises were considered and developed for use in this study. Farm enterprise sizes were determined by estimating the acreage level at which a …

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Kentucky Feeder Cattle Price Analysis: Models For Price Predictions And Grazing Management, Roger Wayne Eldridge Jan 2005

Kentucky Feeder Cattle Price Analysis: Models For Price Predictions And Grazing Management, Roger Wayne Eldridge

University of Kentucky Master's Theses

Kentucky plays an important role in the complex U.S. beef cattle industry. Thisstudy focused on the feeder cattle production sector of Kentucky's beef cattle industry.Primarily a cow-calf state with a substantial backgrounding sector, Kentucky is a largesupplier of feeder cattle to the cattle finishing sector. Price relationships within themarket for Kentucky feeder cattle were examined using historical price data fromKentucky livestock auction markets. This research revealed many interesting pricerelationships that Kentucky producers may use in order to increase the profitability of thecow-calf and/or backgrounding operations. A segment of this research includes aGrazing Management Decision Tool which was constructed to enable …

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Demand Determinants For U.S. Exports Of Processed Foods To Emerging Markey Economies, Sanjeev Kumar Jan 2005

Demand Determinants For U.S. Exports Of Processed Foods To Emerging Markey Economies, Sanjeev Kumar

University of Kentucky Master's Theses

The objectives of this research are to examine the demand for processed foods by emerging markets and to assess demand determinants and potential import growth. Processed foods are the fastest growing segment of U.S. agricultural exports and hence it is imperative to understand the underlying factors behind this growth. Based on a “modified gravity model,” we estimate U.S. exports of processed foods to 10 low and middle-income countries from 1980-2002 using fixed effects method. A classical linear regression model estimates U.S. exports to 60 low and middle-income countries. Results from the classical model indicate that population and income have a …

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An Assessment Of Consumer Preferences For Louisiana Strawberries, Michael Neil Bruchhaus Jan 2005

An Assessment Of Consumer Preferences For Louisiana Strawberries, Michael Neil Bruchhaus

LSU Master's Theses

Louisiana strawberry production has decreased over a period of years while national production has increased, leading to concern that Louisiana's strawberry industry might disappear. California, the leading producer state, has exploited its production advantages and marketing efficiency to increase production. The objectives of the study were (1) to identify strawberry attributes preferred by consumers in the selected market area, (2) to analyze key demographic factors that influence the decision about sources of and preferences for strawberries, and (3) to identify key steps that the Louisiana strawberry industry might take to improve marketability of product and profitability of its production. Conjoint …

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Sanpete County Agriculture Profile, E. Bruce Godfrey, Matt Palmer, Dale Baker, Spencer Parkinson Jan 2005

Sanpete County Agriculture Profile, E. Bruce Godfrey, Matt Palmer, Dale Baker, Spencer Parkinson

All Current Publications

This publication includes a report that gives agricultural facts and statistics pertaining to Sanpete County.

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San Juan County Agriculture Profile, E. Bruce Godfrey, James Keyes, Dale Baker, Spencer Parkinson Jan 2005

San Juan County Agriculture Profile, E. Bruce Godfrey, James Keyes, Dale Baker, Spencer Parkinson

All Current Publications

This publication includes a report that gives agricultural facts and statistics pertaining to San Juan County.

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Grand County Agriculture Profile, Mike Johnson, E. Bruce Godfrey, Dale Baker, Spencer Parkinson Jan 2005

Grand County Agriculture Profile, Mike Johnson, E. Bruce Godfrey, Dale Baker, Spencer Parkinson

All Current Publications

This publication includes a report that gives agricultural facts and statistics pertaining to Grand County.

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Sevier County Agriculture Profile, E. Bruce Godfrey, David Drake, Dale Baker, Spencer Parkinson Jan 2005

Sevier County Agriculture Profile, E. Bruce Godfrey, David Drake, Dale Baker, Spencer Parkinson

All Current Publications

This publication includes a report that gives agricultural facts and statistics pertaining to Sevier County.

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Salt Lake County Agriculture Profile, E. Bruce Godfrey, Earl Jackson, Spencer Parkinson, Dale Baker Jan 2005

Salt Lake County Agriculture Profile, E. Bruce Godfrey, Earl Jackson, Spencer Parkinson, Dale Baker

All Current Publications

This publication includes a report that gives agricultural facts and statistics pertaining to Salt Lake County.

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Wintering Fall-Calving Cow Pairs By Grazing Standing Corn Plants Vs. Mechanically Harvested Feeds Such As Hay Or Straw, A Comparison Of The Performance And Economics, Dale Zobell, Don Snyder, Randall Wiedmeier, Dale Meek, P. R. Schmidt, T. D. Mcniven Jan 2005

Wintering Fall-Calving Cow Pairs By Grazing Standing Corn Plants Vs. Mechanically Harvested Feeds Such As Hay Or Straw, A Comparison Of The Performance And Economics, Dale Zobell, Don Snyder, Randall Wiedmeier, Dale Meek, P. R. Schmidt, T. D. Mcniven

All Current Publications

No abstract provided.

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