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Articles 31 - 60 of 71
Full-Text Articles in Life Sciences
Soil Erosion Risk Assessment Of The Gölbaşı Environmental Protection Area And Its Vicinity Using The Corine Model, Orhan Dengi̇z, Suat Akgül
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. …
A New Method For The Detection Of Minor Populations Of Citrus Tristeza Virus Strains Infecting Single Citrus Trees, Hani̇fe Genç
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 …
Comparison Of Parameter Estimation Methods For The Three-Parameter Generalized Pareto Distribution, Teki̇n Özteki̇n
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 …
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
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 …
Effect Of Storage Time On Some Mechanical Properties And Bruise Susceptibility Of Pears And Apples, Yeşi̇m Benal Yurtlu, Doğan Erdoğan
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 …
Fifth Year Performance Of Morphologically Graded Cedrus Libani Seedlings In The Central Anatolia Region Of Turkey, Akkin Semerci̇
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, …
The Effects Of Joint Forms (Shape) And Dimensions On The Strengths Of Mortise And Tenon Joints, Ali̇ Naci̇ Tankut, Nurgül Tankut
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 …
Econometric Modeling Of Turkey's Hazelnut Sector: Implications On Recent Policies*, Fahri̇ Yavuz, Avni̇ Bi̇ri̇nci̇, Kenan Peker, Tecer Atsan
Econometric Modeling Of Turkey's Hazelnut Sector: Implications On Recent Policies*, Fahri̇ Yavuz, Avni̇ Bi̇ri̇nci̇, Kenan Peker, Tecer Atsan
Turkish Journal of Agriculture and Forestry
The hazelnut is an important product in Turkey's economy as it is an important source of income for a large number of family farms and makes up around 75% of world production and 20% of total agricultural exports from Turkey. Hazelnut production has increased in recent years along with high levels of storage and expansion of planted areas from traditional steep lands to flat lands, where alternative cropping is possible. The aim of this study was to determine the major causes of these problems using an econometric model of Turkey's hazelnut sector. Estimation results of the model comply with economic …
Effects Of Minimum And Conventional Tillage Systems On Soil Properties And Yield Of Winter Wheat (Triticum Aestivum L.) In Clay-Loam In The Çanakkale Region, Saki̇ne Özpinar, Anil Çay
Effects Of Minimum And Conventional Tillage Systems On Soil Properties And Yield Of Winter Wheat (Triticum Aestivum L.) In Clay-Loam In The Çanakkale Region, Saki̇ne Özpinar, Anil Çay
Turkish Journal of Agriculture and Forestry
The experiment was conducted during the 2001-2003 cropping period to evaluate the effects of 3 tillage systems, conventional tillage (CT), and minimum tillage with rototiller (MTR) and disc (MTD), on the soil properties and wheat yield (Triticum aestivum L.). Based on 2-year results, soil bulk density at 0-10 cm in the growing period in MTR, CT and MTD was 1.20, 1.34 and 1.24 Mg m^{-3} respectively. Corresponding values at 10-20 and 20-30 cm were 1.26, 1.29 and 1.21 Mg m^{-3} and 1.30, 1.27 and 1.40 Mg m^{-3} respectively. Aggregate size distribution and mean weight diameter throughout the 2 years of …
Clay Minerals, Ca/Mg Ratio And Fe-Al-Oxides In Relation To Structural Stability, Hydraulic Conductivity And Soil Erosion In Southeastern Turkey, Kadi̇r Yilmaz, İsmai̇l Çeli̇k, Seli̇m Kapur, John Ryan
Clay Minerals, Ca/Mg Ratio And Fe-Al-Oxides In Relation To Structural Stability, Hydraulic Conductivity And Soil Erosion In Southeastern Turkey, Kadi̇r Yilmaz, İsmai̇l Çeli̇k, Seli̇m Kapur, John Ryan
Turkish Journal of Agriculture and Forestry
Studies of clay mineralogy and related chemical composition are rarely connected with implications for soil management in the field. However, this study attempts to manifest the practical utilization of analytical data for determining the susceptibility to soil erosion. The data obtained involve the determination of clay mineral properties, calcium/magnesium ratios, and free aluminum (Al) and iron (Fe) oxides on structure stability, and hydraulic conductivity properties. Nine representative soil pedons developed on serpentine, limestone, and basalt parent materials were selected for the study. The soils were initially grouped into 3 according to their structural stability values. Group 1 soils had the …
Effects Of Different Water And Nitrogen Levels On The Yield And Periodicity Of Pistachio (Pistacia Vera L.), Mustafa Ünlü, Riza Kanber, Pasquale Steduto, Yusuf Aydin, Kenan Di̇ker
Effects Of Different Water And Nitrogen Levels On The Yield And Periodicity Of Pistachio (Pistacia Vera L.), Mustafa Ünlü, Riza Kanber, Pasquale Steduto, Yusuf Aydin, Kenan Di̇ker
Turkish Journal of Agriculture and Forestry
The effects of 2 irrigation intervals (I_{f1}: 7 days and I_{f2}: 14 days), 4 nitrogen doses (N_g, N_0, N_1, N_2 and N_3) and 2 crop coefficients (K_{pc1}: 0.60 and K_{pc2}: 0.90) on pistachio nut fertigation were studied to establish suitable irrigation and fertigation scheduling. The nitrogen levels were 0, 10, 15 and 20 mg L^{-1}. In the traditional treatment, N_g, each tree received 500/600/400 g of NPK fertilizer at the beginning of February. Other fertilizer doses were applied in the irrigation water through a drip system. Irrigation water amount was calculated based on Class A-Pan evaporation. Wetted percentage in each …
Determining Some Yield And Quality Characteristics Of Mutants Induced From A Durum Wheat (Triticum Durum Desf.) Cultivar, Mehmet Ali̇ Saki̇n, Ahmet Yildirim, Sabri̇ Gökmen
Determining Some Yield And Quality Characteristics Of Mutants Induced From A Durum Wheat (Triticum Durum Desf.) Cultivar, Mehmet Ali̇ Saki̇n, Ahmet Yildirim, Sabri̇ Gökmen
Turkish Journal of Agriculture and Forestry
Mutation breeding is one of the breeding methods used successfully in durum wheat for selecting lines with increased agronomic values. The aim of this study was to select mutant lines having a better agronomic potential than the mother variety Gediz-75 in the M_6 and M_7 generations. The mutants were derived from the variety Gediz-75 of durum wheat (Triticum durum Desf.). The seeds were either irradiated with gamma rays at Cobalt 60 (^{60}Co) or treated with ethyl-methane-sulfonate (EMS). Eighteen selected mutants and the mother variety Gediz-75 were examined in the M_6 and M_7 generations for yield and quality characteristics. The experiments …
Palynological Study On The Pollen Grains Of Selected Turkish Grape (Vitis Vinifera L.) Cultivars, Bi̇rhan Marasali, Münevver Pinar, H. Nurhan Büyükkartal
Palynological Study On The Pollen Grains Of Selected Turkish Grape (Vitis Vinifera L.) Cultivars, Bi̇rhan Marasali, Münevver Pinar, H. Nurhan Büyükkartal
Turkish Journal of Agriculture and Forestry
The pollen morphology and ultrastructure of selected Turkish indigenous grape cultivars and newly released hybrid varieties were examined by light microscopy and scanning electron microscopy. The pollen differed in some microstructural parameters. The size of the pollen grains ranged from 19.0 x 22.4 µm in Beyaz Çavuş to 24.3 x 21.0 µm in Siyah Gemre. Hönüsü cultivar showed significant variations in the sizes of the polar and equatorial axes. The greatest colpus size was measured in Siyah Gemre (18.4 µm) and the longest pore size was observed in Ata sarısı (28 µm). The exine thickness of the pollen grains ranged …
Cambial Isoperoxidases Related To Graft Compatibility In Pear-Quince Graft Combinations, Hati̇ce Gülen, Menşure Çeli̇k, Mehmet Polat, Ati̇lla Eri̇ş
Cambial Isoperoxidases Related To Graft Compatibility In Pear-Quince Graft Combinations, Hati̇ce Gülen, Menşure Çeli̇k, Mehmet Polat, Ati̇lla Eri̇ş
Turkish Journal of Agriculture and Forestry
This study was initiated to survey the graft compatibility characteristics of some selected quince clones known as "S.Ö." with regard to isoperoxidase markers. Compatible (Beurre Hardy = BH) and incompatible (Bartlett = BT) pear cultivars were grafted on quince A (QA) and 13 S.Ö. quince clones by T budding. Bark tissues were collected from the union (4, 8 and 12 weeks after grafting) and from unbudded rootstocks in addition to current-year shoots of 2 pear scions to investigate 2 anodal isoperoxidase bands. Isoperoxidase profiles of the samples were visualized by native polyacrylamide gel electrophoresis and no marked difference was detected …
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
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 …
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
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 …
Breeding Of Winter Wheat (Triticum Aestivum L.) For Different Adaptation Types In Multifunctional Agricultural Production, Zoltan Bedo, Laszlo Lang, Otto Veisz, Gyula Vida
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.
Economic Threshold For Wild Radish (Raphanus Raphanistrum L.) Control In Wheat Fields, Özhan Boz
Economic Threshold For Wild Radish (Raphanus Raphanistrum L.) Control In Wheat Fields, Özhan Boz
Turkish Journal of Agriculture and Forestry
Field experiments were conducted in Aydın province in 1998 and 1999 to determine the economic threshold (ET) using florasulam + flumetsulam, 2,4-D amine, thifensulfuron methyl + tribenuron-methyl, and tribenuron-methyl for wild radish (Raphanus raphanistrum L.) in wheat. The effect of wild radish density (1, 2, 4, 8 and 16 plants m^{-2}) on wheat yield was investigated using an adjacent plot design with 4 fields. For each weed density, yield was compared with that in the adjacent weed-free control plot. The grain yield in wild radish-free wheat was 4079 kg ha^{-1} in 1998, 4369 kg ha^{-1} in 1999 and 4224 kg …
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
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 …
Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya
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 …
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
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 …
An Investigation On The Establishment Of Artificial Pasture Under Ankara's Ecological Conditions*, Sebahatti̇n Albayrak, Hayretti̇n Eki̇z
An Investigation On The Establishment Of Artificial Pasture Under Ankara's Ecological Conditions*, Sebahatti̇n Albayrak, Hayretti̇n Eki̇z
Turkish Journal of Agriculture and Forestry
This study was conducted to determine suitable perennial forage species and their mixtures for the establishment of short-term artificial pastures under dry conditions in Ankara between 2000 and 2002. Alfalfa (Medicago sativa L.), sainfoin (Onobrychis sativa Lam.), smooth brome (Bromus inermis Leys.), crested wheatgrass (Agropyron cristatum (L.) Gaertn.) and their binary and complex mixtures were used. The research was carried out in a randomized block design with 4 replicates. The results showed significant differences among the botanical composition ratio in mixtures. The highest green, hay and dry matter yield were obtained from alfalfa + smooth brome mixtures (16.05 t ha^{-1}, …
Role Of Conventional Plant Breeding And Biotechnology In Future Wheat Production, Sanjaya Rajaram
Role Of Conventional Plant Breeding And Biotechnology In Future Wheat Production, Sanjaya Rajaram
Turkish Journal of Agriculture and Forestry
The global wheat production by year 2020 could be increased by 40% provided there is a good integrated multidisciplinary wheat research program optimally funded by either public or private sectors. More emphasis needs to be placed on: 1) Improving yield potential; 2) Durable disease resistance; 3) Increasing abiotic stress tolerance; 4) Adopting better conservation systems. There are roles for both conventional plant breeding and biotechnology supported by other disciplines to achieve this goal.
Genetics And Breeding For Durable Resistance To Leaf And Stripe Rusts In Wheat, Ravi Prakash Singh, Julio Huerta-Espino, Harindra Manilal William
Genetics And Breeding For Durable Resistance To Leaf And Stripe Rusts In Wheat, Ravi Prakash Singh, Julio Huerta-Espino, Harindra Manilal William
Turkish Journal of Agriculture and Forestry
Singh, R.P., J. Huerta-Espino and H.M. William. 2004. Genetics and breeding for durable resistance to leaf and stripe rusts in wheat. Turk. J. Agric. For. 28: xxx-xxx. Yellow (or stripe) and leaf (or brown) rusts, caused by Puccinia striiformis and P. triticina, respectively, are important diseases of wheat worldwide. Growing resistant cultivars is the most economical and environmentally safe control measure and has no cost to growers. Wheat (Triticum aestivum) cultivars that have remained resistant for a long time, or in other words carry durable or race-nonspecific resistance, are known to occur. Inheritance of resistance indicates that these cultivars often …
Avenacin A-1 Content Of Some Local Oat Genotypes And The In Vitro Effect Of Avenacins On Several Soil-Borne Fungal Pathogens Of Cereals, Fi̇gen Mert Türk, Cem Ö. Egesel, M. Kemal Gül
Avenacin A-1 Content Of Some Local Oat Genotypes And The In Vitro Effect Of Avenacins On Several Soil-Borne Fungal Pathogens Of Cereals, Fi̇gen Mert Türk, Cem Ö. Egesel, M. Kemal Gül
Turkish Journal of Agriculture and Forestry
Avenacins are a mixture of 4 major (avenacin A-1, B-1, A-2 and B-2) autofluorescent compounds that are accumulated in the roots of oats (Avena spp.), especially root tips, and that have antimicrobial properties. In this research, we screened 189 genotypes of the family Gramineae for autofluorescence and also quantified 35 Avena genotypes for avenacin A-1 content, which is the most abundant and toxic avenacin type. Screening under UV transillumination proved that none of the species, except for Avena spp. accumulated avenacins in their roots. We aimed to find a genotype that lacks avenacin A-1 in order to investigate fungus-oat interaction …
Response To Some Acaricides Of The Two-Spotted Spider Mite (Tetranychus Urticae Koch) From Protected Vegetables In Isparta, Recep Ay, Elvan Sökeli̇, İsmai̇l Karaca, M. Oktay Gürkan
Response To Some Acaricides Of The Two-Spotted Spider Mite (Tetranychus Urticae Koch) From Protected Vegetables In Isparta, Recep Ay, Elvan Sökeli̇, İsmai̇l Karaca, M. Oktay Gürkan
Turkish Journal of Agriculture and Forestry
The two-spotted spider mite, Tetranychus urticae Koch, was tested for susceptibility to various acaricides, propargite (Omite) 570 g l^{-1}, amitraz (Kortraz) 200 g l^{-1} and abamectin (Agrimec) 18 g l^{-1}. Propargite, a selective acaricide, has been used to control T. urticae in many crops in Turkey. Amitraz and abamectin have acaricidal and insecticidal properties, and are thus used to control spider mites and some vegetable pests (e.g., whiteflies and Liriomyza spp.). Five different T. urticae populations collected from vegetable greenhouses in Isparta and their responses to those acaricides were investigated by leaf dip assay and compared with those of a …
Antioxidant Activity Of Selected Fruits And Vegetables Grown In Turkey, Feryal Karadeni̇z, Hande Selen Burdurlu, Nuray Koca, Yeşi̇m Soyer
Antioxidant Activity Of Selected Fruits And Vegetables Grown In Turkey, Feryal Karadeni̇z, Hande Selen Burdurlu, Nuray Koca, Yeşi̇m Soyer
Turkish Journal of Agriculture and Forestry
Antioxidant activities of different fruits (apple, quince, grape, pear and pomegranate) and vegetables (potato, onion, spring onion, red radish and red cabbage) were determined. In addition, total phenolic and flavonoid contents of those samples were assessed. Among fruits, pomegranate had the highest (62.7%) antioxidant activity, followed by quince (60.4%), grape (26.6%), apple (25.7%) and pear (13.7%). The antioxidant activity of vegetables ranged from 40.8% (red cabbage) to 12.5% (onion). Total phenolic and flavonoid contents in fruits varied from 326 to 4306 mg of catechin kg^{-1} and from 282 to 2115 mg of catechin kg^{-1}, respectively. Those in vegetables ranged between …
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 …
The Effect Of The Number Of Blades And The Grain Size Of Abrasives In Planing And Sanding On The Surface Roughness Of European Black Pine And Lombardy Poplar, Erol Burdurlu, İlker Usta, Meli̇ha Ulupinar, Bora Aksu, T. Çağri Erarslan
The Effect Of The Number Of Blades And The Grain Size Of Abrasives In Planing And Sanding On The Surface Roughness Of European Black Pine And Lombardy Poplar, Erol Burdurlu, İlker Usta, Meli̇ha Ulupinar, Bora Aksu, T. Çağri Erarslan
Turkish Journal of Agriculture and Forestry
The effect of the number of blades and the abrasive grain size of sandpaper on the surface roughness in wood materials obtained from Lombardy poplar (Populus nigra L.) and European black pine (Pinus nigra A.) were examined. A total of 220 samples were prepared for this purpose. The samples were subjected to roughness measurements according to TS 6212 EN ISO 4288. The values obtained were statistically analyzed and the results were interpreted. The best results among the sanded surfaces in roughness were obtained with 180-grit sandpaper on tangential cut surfaces for Lombardy poplar and with 220-grit sandpaper on tangential cut …
Using Advanced Spectral Analyses Techniques As Possible Means Of Identifying Clay Minerals, Ünal Altinbaş, Yusuf Kurucu, Mustafa Bolca, A. H. El-Nahry
Using Advanced Spectral Analyses Techniques As Possible Means Of Identifying Clay Minerals, Ünal Altinbaş, Yusuf Kurucu, Mustafa Bolca, A. H. El-Nahry
Turkish Journal of Agriculture and Forestry
Spectral analyses, one of the most advanced remote sensing techniques, were used as a possible means of identifying the mineralogy of the clay fractions that corresponded to the Küçük Menderes Plain, south of İzmir, Turkey. Different spectral processes were used to execute the prospective spectral analyses. The processes include: i. the reflectance calibration of TM images belonging to the studied area, ii. using minimum noise fraction (MNF) transformation and iii. creating the pixel purity index (PPI), which was used to the most "spectrally pure", extreme, pixel in multi-spectral images. Spectral analyses of the clay mineralogy of the studied area were …