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2005

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Articles 121 - 150 of 216

Full-Text Articles in Forest Sciences

Silvicultural Best Management Practice Compliance Monitoring Programs In The Southern United States, Amanda L. Husak, Stephen C. Grado, Steven H. Bullard, Steverson O. Moffat Jan 2005

Silvicultural Best Management Practice Compliance Monitoring Programs In The Southern United States, Amanda L. Husak, Stephen C. Grado, Steven H. Bullard, Steverson O. Moffat

Faculty Publications

Passage of the Clean Water Act (CWA) of 1972 prompted states to invest significant resources to develop programs to control nonpoint source (NPS) pollution from forestry and other activities. Forestry-related agencies and organizations have since developed silvicultural best management practice (BMP) guidelines to reduce NPS pollution, maintain stream integrity, and meet state water quality standards. To determine the effectiveness and implementation level of best management practices (BMP) on public and private forestland, states further developed and implemented their BMP compliance monitoring programs. This study documents the similarities and differences in efforts, methods, resources, and expenditures among BMP compliance monitoring programs …

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The Story Of Natural Change From An Abandoned Corn Field (1967) To A Young Forest Thirty-Nine Years Later (2005), Chester County, Pennsylvania, William Overlease, Edith Overlease Jan 2005

The Story Of Natural Change From An Abandoned Corn Field (1967) To A Young Forest Thirty-Nine Years Later (2005), Chester County, Pennsylvania, William Overlease, Edith Overlease

William Overlease Plant Succession Study Documents

No abstract provided.

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Ams Dates From Four Late Prehistoric Period Rock Art Sites In West Central Montana, Sara A. Scott, Carl M. Davis, Karen L. Steelman, Marvin W. Rowe, Tom Guilderson Jan 2005

Ams Dates From Four Late Prehistoric Period Rock Art Sites In West Central Montana, Sara A. Scott, Carl M. Davis, Karen L. Steelman, Marvin W. Rowe, Tom Guilderson

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

In 2002, eight pigment samples were collected from three rock art sites in the Big Belt Mountains of west central Montana. Samples from Hellgate Gulch (24BW9), Avalanche Mouth (24BW19), and the Gates of the Mountains (24LC27) were dated using plasma-chemical extraction and accelerator mass spectrometry. The dates were statistically indistinguishable with ages of 1170 ± 45, 1225 ± 50, and 1280 ± 50 B.P. When calibrated, these ages range from 650 to 990 cal A.D. This corresponds to the early Late Prehistoric period on the Northwestern Plains. An oxalate accretion sample overlying a painted area at another site, Big Log …

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The Lymantria Dispar Nucleopolyhedrovirus Enhancins Are Components Of Occlusion-Derived Virus, James M. Slavicek, Holly J.R. Popham Jan 2005

The Lymantria Dispar Nucleopolyhedrovirus Enhancins Are Components Of Occlusion-Derived Virus, James M. Slavicek, Holly J.R. Popham

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Enhancins are metalloproteinases, first identified in granuloviruses, that can enhance nucleopolyhedrovirus (NPV) potency. We had previously identified two enhancin genes (E1 and E2) in the Lymantria dispar multinucleocapsid NPV (LdMNPV) and showed that both were functional. For this study, we have extended our analysis of LdMNPV enhancin genes through an immunocytochemical analysis of E1 and E2 expression and localization. E1 and E2 peptide antibodies recognized proteins of 84 kDa and 90 kDa, respectively, on Western blots of extracts from L. dispar 652Y cells infected with wild-type virus. The 84- and 90-kDa proteins were first detected at 48 h postinfection (p.i.) …

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Influence Of Salinity On Growth And Yield Attributes In Chickpea Cultivars, Ranju Singla, Neera Garg Jan 2005

Influence Of Salinity On Growth And Yield Attributes In Chickpea Cultivars, Ranju Singla, Neera Garg

Turkish Journal of Agriculture and Forestry

Seeds of 4 cultivars of chickpea (2 desi, CSG 8962 and DCP 92-3, and 2 kabuli, CSG 9651 and BG 267) were grown under 0, 4, 6 and 8 dS m^{-1} levels of salinity until maturity. Shoot and root dry weights, root shoot ratio and various yield parameters were evaluated under salinity at 40, 70 and 100 days after sowing. Salinity significantly reduced dry matter accumulation in both roots and shoots in all cultivars, though declension was more pronounced in BG 267 (kabuli) and DCP 92-3 (desi). Root growth was more adversely affected than shoot growth, which also had an …

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Effects Of Salt And Drought Stresses On Germination And Seedling Growth Of Pea (Pisum Sativum L.), Gamze Okçu, Mehmet Demi̇r Kaya, Mehmet Atak Jan 2005

Effects Of Salt And Drought Stresses On Germination And Seedling Growth Of Pea (Pisum Sativum L.), Gamze Okçu, Mehmet Demi̇r Kaya, Mehmet Atak

Turkish Journal of Agriculture and Forestry

The effects of salt and drought stresses at the water potentials of -2, -4, -6 and -8 bars induced by NaCl and PEG 6000 (polyethylene glycol 6000) each, on germination and early seedling growth, were investigated for 3 pea cultivars (Bolero, Sprinter and Utrillo). Electrical conductivity (EC) values of the NaCl solutions were 4.5, 8.8, 12.7 and 16.3 dS m^{-1}. Germination percentage, mean germination time, root and shoot length, and seedling fresh and dry weight were measured in the study. The objective was to determine genotypic differences among pea cultivars in terms of salt and drought stress and to determine …

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Apple Chlorotic Leaf Spot Virus (Aclsv) Status In Turkey And Sensitive Detection Using Advanced Techniques, Çi̇ğdem Ulubaş Serçe, Fi̇li̇z Ertunç Jan 2005

Apple Chlorotic Leaf Spot Virus (Aclsv) Status In Turkey And Sensitive Detection Using Advanced Techniques, Çi̇ğdem Ulubaş Serçe, Fi̇li̇z Ertunç

Turkish Journal of Agriculture and Forestry

The prevalence of apple chlorotic leaf spot virus (ACLSV) was investigated in all the main stone fruit growing areas of Turkey except for East Anatolia. Three hundred and sixty-nine plant samples showing virus related symptoms were collected from sweet and sour cherry, peach, nectarine, apricot and plum trees. All samples were tested using DAS-ELISA and reverse transcription-polymerase chain reaction (RT-PCR). Thirteen samples were detected as infected with ACLSV using ELISA while RT-PCR revealed 51 positive samples. The highest ACLSV incidence was in Bursa (64%), followed by Yalova (20.51%), Burdur (18.18%), Amasya (13.43%), Afyon (12.07%), Isparta (6.25%), Çanakkale (4.76%) and İzmir …

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Control Of The Carmine Spider Mite Tetranychus Cinnabarinus Boisduval By The Predatory Mite Phytoseiulus Persimilis (Athias-Henriot) In Protected Strawberries In Aydın, Turkey, İbrahi̇m Çakmak, Hüseyi̇n Başpinar, Ni̇lgün Madanlar Jan 2005

Control Of The Carmine Spider Mite Tetranychus Cinnabarinus Boisduval By The Predatory Mite Phytoseiulus Persimilis (Athias-Henriot) In Protected Strawberries In Aydın, Turkey, İbrahi̇m Çakmak, Hüseyi̇n Başpinar, Ni̇lgün Madanlar

Turkish Journal of Agriculture and Forestry

The potential of the predatory mite Phytoseiulus persimilis (Acarina: Phytoseiidae) to control the carmine spider mite Tetranychus cinnabarinus (Acarina: Tetranychidae) on strawberries (cv. ´Camarosa`) grown under plastic tunnels was investigated in 2 fields during the 2001 and 2002 growing seasons in Aydın, Turkey. Three study plots, grower's practice, chemical control and biological control, were established. The population of T. cinnabarinus was controlled in the grower's practice plots by using 1 or 2 acaricide applications. However, it was suppressed with only 1 acaricide application in the chemical control plots at a population level below economic threshold levels. When the pest population …

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Comparative Response Of Two Olive (Olea Europaea L.) Cultivars To Salinity, Mehmet Ali̇ Demi̇ral Jan 2005

Comparative Response Of Two Olive (Olea Europaea L.) Cultivars To Salinity, Mehmet Ali̇ Demi̇ral

Turkish Journal of Agriculture and Forestry

Two olive (Olea europaea L.) cultivars, Leccino and Barnea, were exposed to increasing concentrations of NaCl (control, 2560, 5120 and 7680 mg l^{-1} of NaCl, which is equal to 4.0 dS m^{-1}, 8.0 dS m^{-1} and 12.0 dS m^{-1} salinity) in a sand culture. Plants were harvested and separated into different organs. Thin root, thick root, shoot and leaves were analysed for Na^+, Cl^-, K^+, Ca^{+2} and Mg^{+2} contents. Dry weights of the plants were determined. Shoot elongation was also measured. Increasing NaCl inhibited growth of the plants. However, this effect was only statistically significant in Barnea. The growth of …

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Regional Flood Frequency Analysis Of The Basins Of The East Mediterranean Region, Fati̇h Topaloğlu Jan 2005

Regional Flood Frequency Analysis Of The Basins Of The East Mediterranean Region, Fati̇h Topaloğlu

Turkish Journal of Agriculture and Forestry

Methods known as regional flood frequency analyses have often been used for providing records to be gathered and for determining different quantiles of flood in basins having an adequate runoff gauging station (RS) or no gauge. Regional flood frequency analyses including homogeneity test was applied to annual instantaneous peak flows of 50 RSs in 4 basins of the East Mediterranean region. Only 3 RSs were determined to be inhomogeneous. As a result, regional dimensionless flood frequency curves and variation of mean annual flood with drainage area were obtained. The determination coefficient of the mean annual flood prediction equation of the …

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Evaluation Of Thermal Treatability Of Caucasian Fir (Abies Nordmanniana (Link.) Spach.) Treated With Heated Tanalith-C Of Cca Above And Below The Fibre Saturation Point, İlker Usta Jan 2005

Evaluation Of Thermal Treatability Of Caucasian Fir (Abies Nordmanniana (Link.) Spach.) Treated With Heated Tanalith-C Of Cca Above And Below The Fibre Saturation Point, İlker Usta

Turkish Journal of Agriculture and Forestry

Caucasian fir (Abies nordmanniana (Link.) Spach.) was treated using the full-cell process with heated tanalith-C at elevated temperatures from 5 to 70 ºC above and below the fibre saturation point (FSP: 32.1%) (in 40% and 20% moisture content (MC) levels). Thermal treatability was determined on the basis of preservative uptake (the percentage of void volume filled, VVF%) in transverse flow (a combination of tangential and radial directions) and triplex flow (based on all 3 flow directions). To characterise the treatability, analysis of the coefficient of transverse thermal conductivity was also performed above and below the FSP. Thermal conductivity (Tc) increased …

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Effects Of Stratification, Temperature And Storage On Germination In Three Provenances Of Fraxinus Angustifolia Subsp. Oxycarpa Seeds, Fahretti̇n Ti̇lki̇, Emrah Çi̇çek Jan 2005

Effects Of Stratification, Temperature And Storage On Germination In Three Provenances Of Fraxinus Angustifolia Subsp. Oxycarpa Seeds, Fahretti̇n Ti̇lki̇, Emrah Çi̇çek

Turkish Journal of Agriculture and Forestry

The effects of stratification, temperature and storage on seed germination performance were investigated in 3 provenances of Fraxinus angustifolia subsp. oxycarpa seeds. In the first study, seeds were subjected to 9 different periods of cold stratification or warm stratification followed by cold stratification to overcome dormancy. Stratification and provenances affected seed germination percentage (GP) and germination value (GV) when seeds were germinated in darkness at 30/20 ºC. Sixteen weeks' cold stratification (GP = 40.0, GV = 3.8), 4 weeks' warm stratification + 4 weeks' cold stratification (GP = 43.7, GV = 4.2) and 4 weeks' warm stratification + 8 weeks' …

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Characterizing Moisture Regimes For Assessing Fuel Availability In North Carolina Vegetation Communities, Roberta A. Bartlette, James Reardon, Gary M. Curcio Jan 2005

Characterizing Moisture Regimes For Assessing Fuel Availability In North Carolina Vegetation Communities, Roberta A. Bartlette, James Reardon, Gary M. Curcio

Joint Fire Science Program Research Project Reports

In the southeastern United States prescription burning, fire danger rating and wildfire suppression strategies are constrained by limited knowledge of the influence of moisture content in live vegetation, organic soils, water table and weather. The interactive influence of these factors on fire behavior is not well studied. The 3+ year long study reported here was conducted to gain direct empirical understanding of seasonal fuel and soil moisture dynamics in shrub-dominated pocosin communities, in coastal Virginia and North Carolina, mixed hardwoods communities containing significant laurel and rhododendron understory fuels in western North Carolina and eastern Tennessee, and longleaf pine communities in …

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Fuel Reduction And Restoration Of Pine/Hardwood Ecosystems Severely Impacted By The Recent Southern Pine Beetle (Dendroctonus Frontalis) Epidemic In The Southern Appalachians, James M. Vose, Katherine J. Elliott Jan 2005

Fuel Reduction And Restoration Of Pine/Hardwood Ecosystems Severely Impacted By The Recent Southern Pine Beetle (Dendroctonus Frontalis) Epidemic In The Southern Appalachians, James M. Vose, Katherine J. Elliott

Joint Fire Science Program Research Project Reports

As a result of this most recent SPB epidemic (1999-2003), thousands of hectares of dead pine trees have created wildfire-hazard conditions in the southern Appalachians. One of the challenges for land managers is how to return fire to these ecosystems after (1) nearly a decade of exclusion, and (2) the more recent SPB mortality enhanced fuel loads. Higher fuel loads have the potential to increase fire intensity and severity. At the extremes, fires of high intensity and severity can have a large effect on ecosystem structure and function. The objectives of our research were: (1) to quantify fuel load reduction …

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Manejo De Cipós Na Amazônia, Jeffrey J. Gerwing, Edson Vidal Jan 2005

Manejo De Cipós Na Amazônia, Jeffrey J. Gerwing, Edson Vidal

Environmental Science and Management Faculty Publications and Presentations

Levantamentos florestais revelam que os cipós vêm se tornando cada vez mais abundantes em toda a Amazônia, tanto em florestas intactas quanto nas afetadas por atividades humanas, como a exploração de madeira. Nessa atividade, é recomendado o corte dos cipós ligados à árvore escolhida, para reduzir os danos às demais durante a queda. Conhecer a ecologia desse grupo de plantas e seu adequado manejo é essencial para entender as conseqüências do seu corte e para cumprir as metas de conservação da biodiversidade incluídas nos projetos de manejo de florestas tropicais.

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Effects Of Herbicide Application Of Foliar Morphology And Nutrient Concentrations In Mid-Rotation Pine Plantations, Prabudhda Dahal, Hal O. Liechty Jan 2005

Effects Of Herbicide Application Of Foliar Morphology And Nutrient Concentrations In Mid-Rotation Pine Plantations, Prabudhda Dahal, Hal O. Liechty

Journal of the Arkansas Academy of Science

Application of herbicide to reduce competing brush and hardwood species is a common silvicultural activity in young loblolly pine (Pinus taeda) stands. A reduction in competition generally increases the amount of available resources to the loblolly pine crop trees thereby increasing foliage biomass, fascicle dimensions, and foliar nutrient concentrations. To what extent herbicide application and competition control alters these foliar characteristics in mid-rotation stands has rarely been reported. The purpose of this paper is to evaluate whether the application of herbicide alters the morphology, mass, and/or nitrogen concentration of mid-rotation loblolly pine foliage. We aerially applied an imazapyr herbicide to …

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Identifying The Factors Distinguishing Timber Sales On Industrial And Non-Industrial Private Forest Lands In Arkansas, Sayeed R. Mehmood, Prabudhda Dahal Jan 2005

Identifying The Factors Distinguishing Timber Sales On Industrial And Non-Industrial Private Forest Lands In Arkansas, Sayeed R. Mehmood, Prabudhda Dahal

Journal of the Arkansas Academy of Science

Although forests provide a wide variety of products and services, timber still continues to be the most valued forest product in the marketplace. More than two-third of the nation's forests are under private control, some are owned by industries (about 10%) while a much larger portion (about 59%) is owned by individuals. This study investigates the differences between timber sales offered by industrial and non-industrial ownerships. A test of means revealed that there is a significant difference between per hectare bid for these 2 types of sales. A logistic regression model was then estimated to identify important factors characterizing this …

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Presettlement Pinus Tadea Mississippi Valley Alluvial Plain Of The Monroe County, Arkansas Area, Don C. Bragg Jan 2005

Presettlement Pinus Tadea Mississippi Valley Alluvial Plain Of The Monroe County, Arkansas Area, Don C. Bragg

Journal of the Arkansas Academy of Science

No abstract provided.

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Biotechnology Applications For Wheat Improvement At Cimmyt, Harindra Manilal William, Ravi Prakash Singh, Richard Trethowan, Maarten Van Ginkel, Alessandro Pellegrinshi, Julio Huerta-Espino, David Hoisington Jan 2005

Biotechnology Applications For Wheat Improvement At Cimmyt, Harindra Manilal William, Ravi Prakash Singh, Richard Trethowan, Maarten Van Ginkel, Alessandro Pellegrinshi, Julio Huerta-Espino, David Hoisington

Turkish Journal of Agriculture and Forestry

Despite the tremendous advances made by plant breeders in increasing the global food production, there is still a significant need for increased quantity and quality of food items in various regions of the world. Although this can be partially solved by upgrading the storage and distribution networks, crop performance and yield potentials are constantly challenged by various biotic and abiotic stress factors. As additional tools to facilitate the global wheat breeding efforts at CIMMYT, we have used molecular markers for characterizing loci that confer adult plant resistance to leaf rust and yellow (stripe) rust, which are globally important diseases in …

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Controlling Foliar Blight Of Wheat In South Asia: A Holistic Approach, Etienne Duveiller, R. C. Sharma, D. Mercado, H. Maraite, M. R. Bhatta, G. Ortiz-Ferrara, D. Sharma Jan 2005

Controlling Foliar Blight Of Wheat In South Asia: A Holistic Approach, Etienne Duveiller, R. C. Sharma, D. Mercado, H. Maraite, M. R. Bhatta, G. Ortiz-Ferrara, D. Sharma

Turkish Journal of Agriculture and Forestry

Foliar blight is a major biotic constraint to wheat in the Gangetic plains of south Asia, particularly in the rice-wheat system. The disease occurs as a complex of spot blotch and tan spot caused by C. sativus and P. tritici-repentis, respectively. Yield losses reach on average 15% but are variable depending on sowing time, years, locations and stress conditions. Resistance breeding has been the cornerstone of the control strategy. Through international agricultural research efforts in collaboration with National Agricultural Research Systems (NARS), resistance sources from China, Zambia and Brazil were identified and novel germplasm such as synthetic hexaploid wheats derived …

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Breeding Of Winter Wheat (Triticum Aestivum L.) For Different Adaptation Types In Multifunctional Agricultural Production, Zoltan Bedo, Laszlo Lang, Otto Veisz, Gyula Vida Jan 2005

Breeding Of Winter Wheat (Triticum Aestivum L.) For Different Adaptation Types In Multifunctional Agricultural Production, Zoltan Bedo, Laszlo Lang, Otto Veisz, Gyula Vida

Turkish Journal of Agriculture and Forestry

Germplasm research for sustainable wheat production has undergone a significant development in recent years. Considerable progress has been witnessed in breeding, especially with the selection of winter wheat genotypes with better adaptability to different technological systems in multifunctional agricultural production. The selection of wheat genotypes with abiotic and biotic resistance, stable performance under different fertilizer applications and for various technological systems, will contribute to the development of germplasm with special adaptation type and to that of environment-friendly technologies.

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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 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 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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Effect Of Storage Time On Some Mechanical Properties And Bruise Susceptibility Of Pears And Apples, Yeşi̇m Benal Yurtlu, Doğan Erdoğan Jan 2005

Effect Of Storage Time On Some Mechanical Properties And Bruise Susceptibility Of Pears And Apples, Yeşi̇m Benal Yurtlu, Doğan Erdoğan

Turkish Journal of Agriculture and Forestry

This research was conducted to evaluate the effect of storage time on some mechanical properties and bruise susceptibility of Williams and Ankara varieties of pear and Starkspur Golden Delicious and Starking varieties of apple. The research was performed in 2 stages. Firstly, compression tests were conducted to determine the mechanical properties of fruits. Secondly, an impact test was used to determine the bruise susceptibility of test materials. Impact tests were performed using a pendulum with 50 cm arm length. The tests were carried out at 5 storage times (harvest day, 1^{st}, 2^{nd}, 3^{rd} and 4^{th} month) and 3 drop heights …

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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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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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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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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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