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Articles 1 - 30 of 51
Full-Text Articles in Forest Sciences
Impact Of The Agricultural Sector On The Arkansas Economy, H. L. Goodwin Jr., Jennie Popp, Wayne Miller, Gina Vickery, Z. Clayton-Niederman
Impact Of The Agricultural Sector On The Arkansas Economy, H. L. Goodwin Jr., Jennie Popp, Wayne Miller, Gina Vickery, Z. Clayton-Niederman
Research Reports and Research Bulletins
Agriculture historically has been one of the primary sectors of the Arkansas economy. Agriculture is defined as the sum of agricultural, forestry, and fisheries production and processing activities unless otherwise specified. Not only does agriculture contribute to the economy through direct agricultural production and added value processing, it also plays an important role through the economy’s other sectors. Utilizing data from the United States Bureau of Economic Affairs and the State of Arkansas, the economic impact of agriculture on the Arkansas economy was estimated for the latest year available, 1999. Gross State Product (GSP) information for Arkansas was compared with …
Production Of Dissolving Grade Pulp From Poplar Wood By Ethanol-Water Process, Hüseyi̇n Kirci, Mehmet Akgül
Production Of Dissolving Grade Pulp From Poplar Wood By Ethanol-Water Process, Hüseyi̇n Kirci, Mehmet Akgül
Turkish Journal of Agriculture and Forestry
The possibilities of dissolving grade pulp production from poplar by an ethanol-water process were investigated. The effects of ethanol ratio, cooking temperature and acid catalyst ratio on unbleached, bleached and alkali-purified pulps were studied. It was seen that catalyst ratios exceeding 0.01% caused serious yield and viscosity losses. The results showed that with the catalyst ratio to pulping liquor exceeding 0.01%, pulp yield and viscosity were reduced to an unacceptable level. The best pulping result was obtained at 40% ethanol consistency, 180 ºC pulping temperature and 150 min reaction time without the addition of acid catalyst to the pulping liquor. …
Crystalline Structure Properties Of Bleached And Unbleached Wheat Straw (Triticum Aestivum L.) Soda-Oxygen Pulp, Esat Gümüşkaya, Mustafa Usta
Crystalline Structure Properties Of Bleached And Unbleached Wheat Straw (Triticum Aestivum L.) Soda-Oxygen Pulp, Esat Gümüşkaya, Mustafa Usta
Turkish Journal of Agriculture and Forestry
In this study, the crystallinity index and crystallite size of wheat straw powder, soda-oxygen pulp and soda oxygen pulp bleached with hypochlorite (H) and hypochlorite and peroxide (HP) sequences were determined using an x-ray diffractometer method. The crystallinity indexes of these pulp samples were found to be 45.61%, 52.00%, 52.60% and 54.11%, respectively. The crystallite sizes of these pulp samples were also determined and were 6.4 nm, 3.4 nm, 4.3 nm and 4.6 nm, respectively. On the other hand, the crystallinity index and crystallite size of holocellulose, cellulose and alpha-cellulose in wheat straw were then found to be 65.00%, 55.20% …
Comparison Of Erosion And Runoff Predicted By Wepp And Agnps Models Using A Geographic Information System, Hali̇l Kirnak
Comparison Of Erosion And Runoff Predicted By Wepp And Agnps Models Using A Geographic Information System, Hali̇l Kirnak
Turkish Journal of Agriculture and Forestry
The Water Erosion Prediction Project (WEPP) model and the Agricultural Non-Point-Source Pollution Model (AGNPS) were used in conjunction with a geographic information system (GIS) database to predict runoff and sediment discharges for Rock Creek watershed, an agricultural watershed in Ohio, USA. Observed and predicted values were compared for selected storm events in 1988 and 1990. The statistical evaluation of the WEPP and AGNPS models showed that WEPP predicted average runoff, peak runoff and sediment yield better than AGNPS. WEPP and AGNPS overpredicted peak runoff rates compared to observed data by 15.5% and 26.5%, respectively. The t-test showed that there was …
Additive Main Effects And Multiplicative Interactions Analysis Of Yield Performances In Bread Wheat Genotypes Across Environments, Yüksel Kaya, Çeti̇n Palta, Seyfi̇ Taner
Additive Main Effects And Multiplicative Interactions Analysis Of Yield Performances In Bread Wheat Genotypes Across Environments, Yüksel Kaya, Çeti̇n Palta, Seyfi̇ Taner
Turkish Journal of Agriculture and Forestry
This study was carried out to determine the yield performances of 20 bread wheat genotypes across six environments in Central Anatolia, Turkey, in the 2000-2001 growing season. The experimental layout was a randomized complete block design with four replications. Additive main effects and multiplicative interactions analysis (AMMI) indicated that the yield performances of genotypes were under the major environmental effects of genotype by environmental interactions. The first two principal component axes (PCA 1 and 2) were significant (p < 0.01) and cumulatively contributed to 78.64% of the total genotype by environment interaction. A biplot generated using genotypic and environmental scores of the first two AMMI components also showed that genotypes with larger PCA 1 and lower PCA 2 scores gave high yields (stable genotypes), and genotypes with lower PCA 1 and larger PCA 2 scores had low yields (unstable genotypes), as in the sites tested.
Effect Of Different Planting Times On Essential Oil Components Of Different Mint (Mentha Spp.) Varieties, Abdulhabi̇p Özel, Menşure Özgüven
Effect Of Different Planting Times On Essential Oil Components Of Different Mint (Mentha Spp.) Varieties, Abdulhabi̇p Özel, Menşure Özgüven
Turkish Journal of Agriculture and Forestry
This study was carried out to determine the effect of different planting times on the essential oil components of different mint varieties (Mentha arvensis var. piperascens, M. piperita Mitcham, M. piperita Eskişehir and M. piperita Prilubskaja). The field trials were conducted at the GAP Agricultural Research Station under Harran Plain conditions in 1993 and 1994. The mint oil components, a-pinene (0.49-1.00%), b-pinene (1.38-2.12%), 1,8-cineole (2.64-10.85%), menthone, menthofuran (28.09-49.52%), menthole (22.55-38.89%), pulegone (0.00-1.32%), menthyl acetate (0.46-6.78%) and b-caryophyllene (0.54-2.84%), were determined. The results indicated that the essential oil components were affected by planting times, mint varieties and cutting numbers. The highest …
The Amount Of No_{3}^{-}-N Transferred To Soil By Legumes, Forage And Seed Yield, And The Forage Quality Of Annual Legume + Triticale Mixtures, Uğur Büyükburç, Yaşar Karadağ
The Amount Of No_{3}^{-}-N Transferred To Soil By Legumes, Forage And Seed Yield, And The Forage Quality Of Annual Legume + Triticale Mixtures, Uğur Büyükburç, Yaşar Karadağ
Turkish Journal of Agriculture and Forestry
The forage yield and quality of hairy vetch, grasspea and triticale grown alone and as mixtures of legume + triticale were investigated in field experiments conducted in the fields of the Faculty of Agriculture of Gaziosmanpaşa University in 1998-1999 and 1999-2000. The highest dry matter (10.06 t/ha) and crude protein yields (1.56 t/ha) were obtained from the mixture including 50% Line-452 of grasspea + 50% triticale. On the other hand, the highest seed yield (5.38 t/ha) was achieved from the 50% Line-38 of grasspea + 50% triticale mixture. The amount of NO_{3}^{-}-N transferred to the soil by legumes (0.079 t/ha) …
Seasonal Carbohydrate Changes Of The Bark Tissues Of Hazelnut Cultivars Grown In The East And West Black Sea Region, Yeşi̇m Okay, A. İlhami̇ Köksal, Nevzat Artik
Seasonal Carbohydrate Changes Of The Bark Tissues Of Hazelnut Cultivars Grown In The East And West Black Sea Region, Yeşi̇m Okay, A. İlhami̇ Köksal, Nevzat Artik
Turkish Journal of Agriculture and Forestry
The seasonal changes in total carbohydrate, fructose, glucose and sucrose levels of bark tissues of the Tombul, Palaz, Kalınkara, Çakıldak and Sivri cultivars grown in the East and West Black Sea regions were determined by high performance liquid chromatography (HPLC). As with other fruit species, carbohydrate levels decreased from the end of spring to summer, showed steady changes with low values in summer and increased starting in the middle of fall until winter. Despite a general tendency of decline during spring, the carbohydrate and soluble sugar contents of Sivri increased in the Düzce region in April. Annual changes in carbohydrates …
Game Theory And Its Application To Field Crops In Antalya Province, Burhan Özkan, Handan Vuruş Akçaöz
Game Theory And Its Application To Field Crops In Antalya Province, Burhan Özkan, Handan Vuruş Akçaöz
Turkish Journal of Agriculture and Forestry
The purpose of this paper is twofold. The first aim is to present briefly game theory and to illustrate the relationship between game theory and linear programming. The other aim is to apply game theory to field crops. The game theory model was used for main field crops, namely wheat, barley, maize, chickpea, sesame, cotton and groundnut, in Antalya province in Turkey. The data included time series of gross product values of the investigated crops for the period 1980-1999. The Wald decision-making criterion was applied to the game theory model to determine the highest income under the worst conditions. The …
Developing Tobacco Lines Resistant To Powdery Mildew (Erysiphe Cichoracearum L.) By Anther Culture Technique For The Aegean Region, A. Sani̇ye Gencer
Developing Tobacco Lines Resistant To Powdery Mildew (Erysiphe Cichoracearum L.) By Anther Culture Technique For The Aegean Region, A. Sani̇ye Gencer
Turkish Journal of Agriculture and Forestry
The anther culture technique as a biotechnological application was combined with conventional breeding methods in order to improve tobacco varieties' resistant to powdery mildew prevailing in the Aegean region of Turkey. For this, resistance was transferred to two varieties from a genitor by the backcross method leading to derive haploid plants from the cultured anthers of BC_1 plants firstly, and dihaploid plants by acenaphthene or colchicine treatments secondly. A total of 14 dihaploid lines out of 67 DH lines developed were found to be resistant to powdery mildew in disease screening tests. They were later subjected to field experiments to …
Effects Of Girdling, Ga3 Applications And Additional Nutrient Applications On Fruit Yield, Fruit Set And Fruit Size In The Clementine Mandarin, Turgut Yeşi̇loğlu, Ebru Cücü Açikalin
Effects Of Girdling, Ga3 Applications And Additional Nutrient Applications On Fruit Yield, Fruit Set And Fruit Size In The Clementine Mandarin, Turgut Yeşi̇loğlu, Ebru Cücü Açikalin
Turkish Journal of Agriculture and Forestry
In small fruit species, like the mandarin, fruit size is lower in Turkey than in other countries and this has a negative effect on their marketing. There are problems with fruit yield and size in the Clementine mandarin, which is a commonly grown mandarin cultivar in Turkey. To solve these problems, various studies have been carried out. Girdling is one of the methods studied and it had positive effects on fruit yield and size without lowering the fruit quality. However, fruit yield and fruit size were reduced to previous levels if the treatment was repeated over a long period. In …
Effects Of Pruning Treatments On The Yield And Fruit Quality Of Precoce De Tyrinthe Apricot Cultivar, Levent Son, Ali̇ Küden
Effects Of Pruning Treatments On The Yield And Fruit Quality Of Precoce De Tyrinthe Apricot Cultivar, Levent Son, Ali̇ Küden
Turkish Journal of Agriculture and Forestry
This study was carried out to determine the effects of pruning on the yield, fruit quality and phenological aspects of three year-old trees of the Precoce de Tyrinthe apricot cultivar grown in Mut-Mersin. In the first experimental year, unpruned trees were found to be more productive; however, these trees gave lower yields (6.5 kg/tree) in the second year due to alternate bearing. August+winter (12.0 kg/tree), July+winter (10.4 kg/tree), and September+winter (10.1 kg/tree) pruning applications were more productive than control trees (6.50 kg/tree). The fruit size of the control trees was 34.05 g, while September+winter (45.66 g), August+winter (44.70 g), and …
The Effect Of Tobacco Waste Application On The Physical And Chemical Properties Of Alkaline Soils, Kenan Kiliç, Kadi̇r Saltali, A. Kadi̇r Sürücü
The Effect Of Tobacco Waste Application On The Physical And Chemical Properties Of Alkaline Soils, Kenan Kiliç, Kadi̇r Saltali, A. Kadi̇r Sürücü
Turkish Journal of Agriculture and Forestry
This study was conducted to (i) determine the effect of tobacco waste application on the soil structure stability (SS), hydraulic conductivity (HC), bulk density, exchangeable sodium percentage (ESP), sodium adsorption ratio (SAR), and electrolyte concentration of alkaline soils, and (ii) observe the possibility of using tobacco waste for the reclamation of alkaline soils. The study was designed in randomized complete blocks with three replications and tobacco waste was applied at a rate of 0, 0.5, 1.5, 2.0 ton/ha to each block. The hydraulic conductivity and structure stability of the alkaline soils studied were substantially improved with increased rates of tobacco …
Research On The Determination Of The Socio-Economic Factors Affecting The Farmers' Behaviour In Adopting Land Consolidation Implemented In Güzelbeyli Town In Zile County, Tokat Province, Nuray Kizilaslan, Sevi̇lay Almus
Research On The Determination Of The Socio-Economic Factors Affecting The Farmers' Behaviour In Adopting Land Consolidation Implemented In Güzelbeyli Town In Zile County, Tokat Province, Nuray Kizilaslan, Sevi̇lay Almus
Turkish Journal of Agriculture and Forestry
The main purpose of this study was to determine the factors affecting the farmers' adoption behaviour in adopting land consolidation implemented in Güzelbeyli town in Zile county, Tokat province. Chi-square analysis was performed to determine whether a difference existed between the farmers who adopted and did not adopt the land consolidation. The results of the analysis indicated that there were some factors affecting the adoption of land consolidation such as farmers' social participation level and their level of awareness about land consolidation. This result may show that the participation of farmers in different activities increases parallel to an expansion in …
Efficiency Indicators In Irrigation Projects' Performance Evaluation: A Case Study On The Bursa Groundwater Irrigation Project, Seni̇h Yazgan, Hasan Deği̇rmenci̇
Efficiency Indicators In Irrigation Projects' Performance Evaluation: A Case Study On The Bursa Groundwater Irrigation Project, Seni̇h Yazgan, Hasan Deği̇rmenci̇
Turkish Journal of Agriculture and Forestry
Using the 1992-1996's irrigation results, 15 different physical, economic and institutional efficiency indicators were applied to the Bursa groundwater irrigation project to evaluate the performance of the system. A water supply ratio of 0.6-1.09, an irrigation ratio of 57-81%, a realized crop pattern ratio of 71-96.6%, a benefit-cost ratio of 2.5-10.0, a planned water supply ratio of 61-115.3%, a water-use per unit area of 5917.3-8701.3 m^3 ha^{-1}, a water fee collection ratio of 71-100%, a sustainable irrigated area ratio of 1.71, an output per unit command of $ 2628.7 ha^{-1} and output per cropped area of $ 4198.5 ha^{-1} were …
Forage Yield Of Different Alfalfa Cultivars Under Ankara Conditions, Suzan Altinok, Azi̇z Karakaya
Forage Yield Of Different Alfalfa Cultivars Under Ankara Conditions, Suzan Altinok, Azi̇z Karakaya
Turkish Journal of Agriculture and Forestry
This research was carried out in the experimental field of Ankara University, Faculty of Agriculture, Department of Field Crops during the years 1997, 1998, and 1999. Alfalfa cultivars Elçi, Kayseri, Mesa Sirsa, Fortress, Bilensoy-80, 5638/Miral, Peru, and Bitlis were used as materials. Plant heights of alfalfa cultivars during three years were highest before first cuts, and the highest forage yields were obtained from these cuts. According to the results, total green yields and dry matter yields were 1869 and 651 kg/da in first year, 4071 and 1297 kg/da in the second year, and 3839 and 1226 kg/da in the third …
Quantitative Determination Of Alkyl Ketene Dimer (Akd) Retention In Paper Made On A Pilot Paper Machine, Ari̇f Karademi̇r
Quantitative Determination Of Alkyl Ketene Dimer (Akd) Retention In Paper Made On A Pilot Paper Machine, Ari̇f Karademi̇r
Turkish Journal of Agriculture and Forestry
There have been some problems reported associated with the use of alkyl ketene dimer (AKD) in alkali papermaking. Excessive use of size emulsion, poor size performance when filler used, problems with back water contamination, poor retention, and formation of pitch deposits on machinery are some of the problems experienced during papermaking operations. In addition, paper containing AKD is reported to lose its resistance, over time against liquid penetration and tends to become slippery. Therefore, in this study, the retention and reaction mechanisms of AKD internal sizing agent in a paper matrix were investigated by capillary gas chromatography (GC) in an …
Chromosome Association In Allotetraploid Interspecific Hybrid Ryegrass And Parental Species, Bi̇lal Deni̇z
Chromosome Association In Allotetraploid Interspecific Hybrid Ryegrass And Parental Species, Bi̇lal Deni̇z
Turkish Journal of Agriculture and Forestry
This study was carried out in glasshouse conditions in summer 2000. Metaphase I (MI) chromosome association and numbers of chromosome arms bound were studied in autotetraploid perennial (Lolium perenne L.) and annual ryegrass (Lolium multiflorum Lam.) and their interspecific hybrid plants (Lolium hybridum). In addition, the relationships among different cytological characteristics with respect to meiotic regularity were determined. Chromosome associations at MI were often regular in the parent species and hybrid ryegrass plants however different pairing irregularities were found to be higher in perennial and especially in hybrid ryegrass plants than in the annual ryegrass plant genotypes. Total bivalent pairing …
Effects Of Seed Origin And Site On Wood Density Of Sitka Spruce (Picea Sitchensis (Bong.) Carr.) Grown In Britain, İlker Usta, Mike Hale
Effects Of Seed Origin And Site On Wood Density Of Sitka Spruce (Picea Sitchensis (Bong.) Carr.) Grown In Britain, İlker Usta, Mike Hale
Turkish Journal of Agriculture and Forestry
Since density may have a direct influence on wood properties and because density is a factor under genetic control, this study details the effects of seed origins and sites on density. In addition to seed origins, its variability both within and between trees was also examined. In this case, the variation in density was investigated in eight seed origins of Sitka spruce (Alaska-AL, British Columbia-BC, Queen Charlotte Islands-QCI, North Washington-NW, South Washington-SW, North Oregon-NO, South Oregon-SO, and California-CA) grown at two sites in Britain (Dalby: Eastern England and Rhondda: South Wales). For this purpose, the five trees of each seed …
An Estimation Of The Recreational Use Value Of Kursunlu Waterfall Nature Park By The Individual Travel Cost Method, Veli̇ Ortaçeşme, Burhan Özkan, Osman Karagüzel
An Estimation Of The Recreational Use Value Of Kursunlu Waterfall Nature Park By The Individual Travel Cost Method, Veli̇ Ortaçeşme, Burhan Özkan, Osman Karagüzel
Turkish Journal of Agriculture and Forestry
The recreational use value of Kursunlu Waterfall Nature Park in the Antalya province of Turkey was studied by using the Individual Travel Cost Method (ITCM). For this purpose, 500 on-site questionnaires were administered between September 1998 and June 1999. By applying certain criteria to these questionnaires, 280 cases were selected for economic analysis. The number of visits made by individuals was used as the dependent variable, while travel costs of individuals to the Park, socio-economic variables (age, education and household income) and alternative sites were selected as the independent variables in the demand model of the Park. A semi-log functional …
Development, Survival And Reproduction Of Three Coccinellids Feeding On Hyalopterus Pruni (Geoffer) (Homoptera: Aphididae), Remzi̇ Atlihan, Mehmet Bora Kaydan
Development, Survival And Reproduction Of Three Coccinellids Feeding On Hyalopterus Pruni (Geoffer) (Homoptera: Aphididae), Remzi̇ Atlihan, Mehmet Bora Kaydan
Turkish Journal of Agriculture and Forestry
The development, survival and fecundity of three aphidophagus coccinellid species, Scymnus apetzi (Mulsant), Scymnus subvillosus (Goeze) and Exochomus nigromaculatus (Goeze), were studied under laboratory conditions (25 ± 1, 65 ± 5% RH and 16 L/8D). Development time from egg to adult was 20.4, 17.1 and 16.7 days for S. apetzi, S. subvillosus and E. nigromaculatus, respectively. Mortality rate from egg to adulthood was highest for S. apetzi (37.9%) followed by S. subvillosus (36.3%) and E. nigromaculatus (25.7%). Duration of the oviposition period was 58.6, 64.9 and 75.3 days, and the total number of eggs per female was 492.8, 224.9 and …
Principal Mechanical Properties Of Eastern Beech Wood (Fagus Orientalis Lipsky) Naturally Grown In Andırın Northeastern Mediterranean Region Of Turkey, İbrahi̇m Bektaş, Cengi̇z Güler, M. Altay Baştürk
Principal Mechanical Properties Of Eastern Beech Wood (Fagus Orientalis Lipsky) Naturally Grown In Andırın Northeastern Mediterranean Region Of Turkey, İbrahi̇m Bektaş, Cengi̇z Güler, M. Altay Baştürk
Turkish Journal of Agriculture and Forestry
The aim of this study was to determine some mechanical properties (compression, static bending, impact bending and shear strengths) of Eastern beech wood (Fagus orientalis Lipsky) and to compare with them other beech species. In the tests, randomly selected logs taken from the trunk 2-4 m height were obtained from trees naturally growing in Andırın (Northeastern Mediterranean region) and these logs were prepared and tested according to Turkish standards. The results showed that the mean compression strength was 606 kgcm^{-2}, static bending strength 1204 kgcm^{-2}, impact bending strength 0.85 kgmcm^{-2} and shear strength 99 kgcm^{-2}. The relations of strengths with …
Effects Of Surface Coating Materials On The Thermal Conductivity And Combustion Properties Of Particleboard, Gökay Nemli̇, Hülya Kalaycioğlu
Effects Of Surface Coating Materials On The Thermal Conductivity And Combustion Properties Of Particleboard, Gökay Nemli̇, Hülya Kalaycioğlu
Turkish Journal of Agriculture and Forestry
The specific properties of particleboard samples used in this study were as follows: 280x210x1.8 cm dimensions, 0.68 g/cm^3 specific gravity. Produced boards were coated with lacquered paint, melamine impregnated papers, wood veneers and continue press laminates. The effects of surface coating material type, melamine paper weight, wood veneer type and thickness, and continue press laminate thickness on the thermal conductivity and combustion properties of particleboard were investigated. Results showed that surface coating material type was found to affect these properties. Melamine paper weight and wood veneer thickness did not affect the thermal conductivity and combustion properties of particleboard samples. Wood …
Satellite Monitoring Of Land Cover / Land Use Change Over 15 Years And Its Impact On The Environment In Gebze / Kocaeli - Turkey, Hülya Yildirim, Mehmet Emi̇n Özel, Nalan Jale Di̇van, Alparslan Akça
Satellite Monitoring Of Land Cover / Land Use Change Over 15 Years And Its Impact On The Environment In Gebze / Kocaeli - Turkey, Hülya Yildirim, Mehmet Emi̇n Özel, Nalan Jale Di̇van, Alparslan Akça
Turkish Journal of Agriculture and Forestry
The rapid industrialisation of an area requires quick preparation of actual land-cover/land-use (LC/LU) maps in order to detect and avoid overuse and damaging of the landscape beyond sustainable development limits. Satellite Remote Sensing and Geographic Information System technologies fit very well for long-term monitoring and assessment of such effects. As a pilot area for the use of such technologies, Gebze district near metropolitan Istanbul is considered. The study is centred on the documentation of LC/LU changes resulting from fast and mostly unregulated industrialisation and urbanisation over the period 1986 - 1998 by satellite images of the area. A comparison is …
Irrigation Scheduling Of Drip-Irrigated Tomatoes Using Class A Pan Evaporation, Öner Çeti̇n, Osman Yildirim, Demet Uygan, Hasan Boyaci
Irrigation Scheduling Of Drip-Irrigated Tomatoes Using Class A Pan Evaporation, Öner Çeti̇n, Osman Yildirim, Demet Uygan, Hasan Boyaci
Turkish Journal of Agriculture and Forestry
This study was carried out to investigate the irrigation schedule of drip-irrigated tomatoes (Lycopersicon esculentum cv. Dual Large, F 1) using Class A pan evaporation. Tomatoes plants were grown in a clay soil in the experimental fields of the Research Institute of Rural Services in Eskişehir between 1998 and 2000. Irrigation water was applied as a certain ratio of Class A pan evaporation (k_{pc} = 0.50, 0.75, 1.00, and 1.25) with different irrigation intervals (2, 4, and 6 days). Significant differences in fruit yields were obtained between the treatments, except for in 1998. Maximum marketable fruit yield was found at …
Determining Suitable Probability Distribution Models For Flow And Precipitation Series Of The Seyhan River Basin, Fati̇h Topaloğlu
Determining Suitable Probability Distribution Models For Flow And Precipitation Series Of The Seyhan River Basin, Fati̇h Topaloğlu
Turkish Journal of Agriculture and Forestry
The frequency analysis of the largest, or the smallest, of a sequence of hydrologic events has long been an essential part of the design of hydraulic structures. Therefore, the question of better fit among countless probability models used in frequency analysis is always a fresh one. The purpose of this study was to make a statistical comparison of currently popular probability models. Therefore, Gumbel, log-Logistic, Pearson-3, log-Pearson-3 and log-Normal-3 distributions were applied to the series of annual instantaneous flood peaks and annual peak daily precipitation for 13 flow gauging and 55 precipitation gauging stations in the Seyhan basin, respectively. The …
Comparison Of Rooting Capabilities Of Turkish Tea Clones, Eyyüp Altindal, Fi̇kri̇ Balta
Comparison Of Rooting Capabilities Of Turkish Tea Clones, Eyyüp Altindal, Fi̇kri̇ Balta
Turkish Journal of Agriculture and Forestry
In this study, single leaf cuttings of 10 Turkish tea (Camellia sinensis) clones Hamzabey-1, Ardeşen-1, Fener-3, Hayrat-1, Çiftekavak-1, Muradiye-10, Tuğlalı-10, Gündoğdu-3, Kömürcüler-1 and Derepazarı-7 were rooted under greenhouse conditions at seven different collection times without using any plant hormones. The cuttings were collected on 28 August, 4 September, 11 September, 19 September, 25 September, 4 October and 10 October. Rooted plants were removed from rooting medium in mid-May. Plant survival, root dry weight, shoot dry weight and shooting percentage were recorded depending on the tea clones and collection times. The highest survival percentage by mean values of collection times was …
Determination Of Genetic Variation In Populations Of Bemisia Tabaci In Antalya, Hüseyi̇n Göçmen, Zübeyi̇r Devran
Determination Of Genetic Variation In Populations Of Bemisia Tabaci In Antalya, Hüseyi̇n Göçmen, Zübeyi̇r Devran
Turkish Journal of Agriculture and Forestry
Although a number of investigations on the molecular genetics of Bemisia tabaci (Gennadius) have appeared in the literature, no such studies are known from Turkey. In order to fill this gap the amplified fragment length polymorphism (AFLP) technique was used to assay eight populations of B. tabaci collected from cotton, protected vegetables (tomato, cucumber and eggplant) and peppermint in various locations in the province of Antalya, Turkey. Eleven AFLP primer pairs detected a total of 547 AFLP fragments in these populations and 389 of these showed polymorphism. Cluster analyses of AFLP data clearly separated these populations into two groups with …
Natural Forest Types And Their Differential Species On Genya Mountain-Artvin, Si̇nan Güner, Ali̇ Demi̇rci̇, Fati̇h Tonguç
Natural Forest Types And Their Differential Species On Genya Mountain-Artvin, Si̇nan Güner, Ali̇ Demi̇rci̇, Fati̇h Tonguç
Turkish Journal of Agriculture and Forestry
To be successful in forestry practices, all factors affecting forests and the interactions among them should be determined. It is important to study and understand the structure and dynamics of forests and make an inventory of existing and non-degraded homogeneous areas of natural forest types in the country. This study was conducted to determine different forest types and their differential species on Genya Mountain in Artvin. Based on the results determined by the Braun-Blanquet method, a total of 8 forest types and 2 typical sub-forest types for type IV, and 3 typical sub-forest types for type VIII were determined. These …
Socio-Economic Structural Analysis Of Small Firms In The Forest Product Industry In The Eastern Black Sea Region In Turkey, Kadri̇ Cemi̇l Akyüz, Hi̇cabi̇ Cindik, Hasan Seri̇n
Socio-Economic Structural Analysis Of Small Firms In The Forest Product Industry In The Eastern Black Sea Region In Turkey, Kadri̇ Cemi̇l Akyüz, Hi̇cabi̇ Cindik, Hasan Seri̇n
Turkish Journal of Agriculture and Forestry
Structural and statistical analyses of small establishments in the forest products industry were performed in 63 towns and cities in six provinces in the Eastern Black Sea region, which is relatively less developed than many other regions in Turkey. The other objective of this study was to classify the establishments by using various factors. Correlation, cluster and discriminate analysis were used for classification of these establishments. Twenty-five various factors, collected especially from workers, were analyzed. The study was realized using questionnaire forms, filled in with the face-to-face communication method. As a result, 341 questionnaire forms were filled out in 63 …