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Genetic Transformation Of Citrus Paradisi With Antisense And Untranslatable Rna-Dependent Rna Polymerase Genes Of Citrus Tristeza Closterovirus, Bayram Çevi̇k, Richard F. Lee, Charles L. Niblett
Genetic Transformation Of Citrus Paradisi With Antisense And Untranslatable Rna-Dependent Rna Polymerase Genes Of Citrus Tristeza Closterovirus, Bayram Çevi̇k, Richard F. Lee, Charles L. Niblett
Turkish Journal of Agriculture and Forestry
Protein and RNA-mediated forms of pathogen-derived resistance (PDR) have been developed against many viruses in different plants. However, no resistance has been reported against Citrus tristeza virus (CTV), a closterovirus, in Citrus species transformed with coat protein genes or other sequences of CTV. The successful use of replication-associated genes in RNA-mediated resistance in other crops prompted the use of the RNA-dependent RNA polymerase (RdRp) gene of CTV for the development of RNA-mediated PDR in Citrus. The RdRP gene was amplified from CTV isolate DPI3800 from Florida and used to generate antisense (RdRp-AS) and untranslatable (RdRp-UT) constructs with point mutation consecutive …
Impact Of Impregnation With Imersol-Aqua On The Yellow Color Tone Of Some Woods And Varnishes, Mustafa Hi̇lmi̇ Çolakoğlu
Impact Of Impregnation With Imersol-Aqua On The Yellow Color Tone Of Some Woods And Varnishes, Mustafa Hi̇lmi̇ Çolakoğlu
Turkish Journal of Agriculture and Forestry
This study was performed to determine the effects of impregnation on the yellow color tone (YCT) of some woods and varnishes. For this purpose, the test specimens prepared from Oriental beech (Fagus orientalis Lipsky) and oak (Quercus petrea Liebl.) according to ASTM D 358 were impregnated with Imersol-Aqua according to ASTM D 1413-99 and the manufacturer's instructions by short-term, medium-term, and long-term dipping, and were then coated with synthetic, acrylic, waterborne, and polyurethane varnishes according to ASTM D 3023. The YCT of test specimens after the varnishing process was determined according to ASTM D 2244-02. As a result, the highest …
Determination Of The Apomictic Fruit Set Ratio In Some Turkish Walnut (Juglans Regia L.) Genotypes, Beki̇r Şan, Hati̇ce Dumanoğlu
Determination Of The Apomictic Fruit Set Ratio In Some Turkish Walnut (Juglans Regia L.) Genotypes, Beki̇r Şan, Hati̇ce Dumanoğlu
Turkish Journal of Agriculture and Forestry
This study was carried out to determine the amount of apomictic fruit set in 10 Turkish walnut (Juglans regia L.) genotypes in 2001, 2002 and 2003. Yalova-1, Şebin, Bilecik, KR-1, KR-2, Şen-2, 07-KOR-l, Tokat-1, Kaman-1 and Kaman-5 cultivars and selections were used in the experiment. Female flowers were bagged and/or pollinated with pollen of the apple cv. 'Golden Delicious' (Malus x domestica Borkh.), and the apomictic fruit set was determined 8 weeks after anthesis. The percentage of apomictic fruit set without pollination ranged from 0.5% to 1.6% in 5 walnut genotypes, namely Yalova-1, Bilecik, 07-KOR-l, Tokat-1 and Kaman-1, in the …
Effects Of Different Nitrogen Doses And Row Spacing Applications On Yield And Quality Of Oenothera Biennis L. Grown In Irrigated Lowland And Unirrigated Dryland Conditions, Nazim Şekeroğlu, Menşure Özgüven
Effects Of Different Nitrogen Doses And Row Spacing Applications On Yield And Quality Of Oenothera Biennis L. Grown In Irrigated Lowland And Unirrigated Dryland Conditions, Nazim Şekeroğlu, Menşure Özgüven
Turkish Journal of Agriculture and Forestry
Common evening primrose (Oenothera biennis L., Onagraceae) is a biennial herbaceous forb. It is commercially cultivated in over 15 countries for its seed oil, which contains the essential fatty acids, linoleic and gamma-linolenic acid. The present study was carried out to determine the effects of different nitrogen doses (0, 60, 120 and 180 kg ha^{-1}) and row spacing applications (20, 40 and 60 cm) on yield and quality of Oenothera biennis L. grown in irrigated lowland and unirrigated dryland in the Gukurova conditions region in 2000 and 2001. The field trials were arranged in split-split-plot design with 3 replicates. Some …
Developing Alternative Wood Harvesting Strategies With Linear Programming In Preparing Forest Management Plans, Emi̇n Zeki̇ Başkent, Sedat Keleş
Developing Alternative Wood Harvesting Strategies With Linear Programming In Preparing Forest Management Plans, Emi̇n Zeki̇ Başkent, Sedat Keleş
Turkish Journal of Agriculture and Forestry
In this paper, the process of developing alternative wood harvesting strategies in forest management planning is presented. Alternative wood harvesting strategies based on linear programming (LP) include a planning horizon of 100 years, an objective of the maximization of net present value (NPV) and various constraints such as classical volume control (even flow) and wood assortments. Model outputs are presented and discussed along with NPVs and amounts of wood assortments by alternative wood harvesting strategies consisting of various discount rates and wood assortments.
Effect Of Sowing Date And Limited Irrigation On The Seed Yield And Quality Of Dill (Anethum Graveolens L.), Saeid Zehtab-Salmasi, Kazem Ghassemi-Golez, Sajad Moghbeli
Effect Of Sowing Date And Limited Irrigation On The Seed Yield And Quality Of Dill (Anethum Graveolens L.), Saeid Zehtab-Salmasi, Kazem Ghassemi-Golez, Sajad Moghbeli
Turkish Journal of Agriculture and Forestry
Field and laboratory experiments were carried out in order to investigate the influence of 3 sowing dates and 4 irrigation disruption treatments at different growth stages on the seed yield and quality of dill (Anethum graveolens L.). The results showed that for successful seed production dill must be sown in early spring (3 to 18 April), since there was no significant difference in seed yield between the sowing dates of 3 April (S_1) and 18 April (S_2). Seeds from S_1 sowing had a higher percentage of germination after accelerated ageing (AA), a faster germination rate and a heavier seedling dry …
Effects Of Nacl On The Germination, Seedling Growth And Water Uptake Of Triticale, Mehmet Atak, Mehmet Demi̇r Kaya, Gamze Kaya, Yakup Çikili, Cemaletti̇n Yaşar Çi̇ftçi̇
Effects Of Nacl On The Germination, Seedling Growth And Water Uptake Of Triticale, Mehmet Atak, Mehmet Demi̇r Kaya, Gamze Kaya, Yakup Çikili, Cemaletti̇n Yaşar Çi̇ftçi̇
Turkish Journal of Agriculture and Forestry
The lack of information about the effects of salinity on vegetative growth of triticale prompted us to study the salt tolerance levels of 3 newly registered cultivars, Karma-2000, Presto, and Tatlıcak-97. Moreover, the relative importance of the osmotic or toxic effects of NaCl on seed germination are not clear in triticale. In this study, germination percentage, seedling fresh and dry weight and water uptake of the seeds of 3 triticale cultivars were determined under various salt (NaCl) stresses with electrical conductivities of 2.4, 4.2, 5.9, 7.7, 10.6 and 13.2 dS m^{-1}. Roots and shoots were analyzed for uptake of Na^+ …
Study On Vertical And Lateral Leaching Of Nitrate From A Wheat Field In China, Md. Toufiq Iqbal
Study On Vertical And Lateral Leaching Of Nitrate From A Wheat Field In China, Md. Toufiq Iqbal
Turkish Journal of Agriculture and Forestry
Vertical and lateral leaching of nitrate from a wheat field was studied through one season in a field in China by applying increasing amount of N fertilizers (e.g. 90, 180, 270 and 360 kg ha^{-1}). Results showed that nitrate leaching was the dominating way of nitrate loss from wheat land during the first two month after sowing seeds. After irrigation, the nitrate concentration in the leachate of 30 cm soil layer was higher than that of 60 cm, while the concentration of nitrate leaching at the five N treatments through the two depth soil layer came into the same level …
The Effect Of Tying And Wrapping Materials And Their Color On Budding Success In Kiwifruit, Hamdi̇ Zengi̇nbal, Hüseyi̇n Çeli̇k, Muharrem Özcan
The Effect Of Tying And Wrapping Materials And Their Color On Budding Success In Kiwifruit, Hamdi̇ Zengi̇nbal, Hüseyi̇n Çeli̇k, Muharrem Özcan
Turkish Journal of Agriculture and Forestry
We studied the effect of tying and wrapping materials and their color on budding success in kiwifruit. The work was done in the open field during 2002-2003. Three-year-old, gallon container grown Hayward seedlings were chip-budded with Hayward chip-bud sticks in the first quarter of May. Raffia (black), cannabis fiber, leathery polyethylene band (white), soft rubbery polyethylene tape (white), paper tape, cotton yarn and plastic string (white) were used as tying and wrapping material in the first experiment. Green, red, black and white raffia was used as wrapping material in the second experiment. In the first trial, the soft rubbery plastic …
Determination Of Crop Water Stress Index For Irrigation Scheduling Of Bean (Phaseolus Vulgaris L.), Yeşi̇m Erdem, Sezen Şehi̇rali̇, Tolga Erdem, Di̇nçer Kenar
Determination Of Crop Water Stress Index For Irrigation Scheduling Of Bean (Phaseolus Vulgaris L.), Yeşi̇m Erdem, Sezen Şehi̇rali̇, Tolga Erdem, Di̇nçer Kenar
Turkish Journal of Agriculture and Forestry
This study was conducted to determine the relationship between the canopy-air temperature differential and the vapor pressure deficit (VPD), which can be used to quantify the crop water stress index (CWSI) under fully irrigated (100%) and maximum water stress (0%) conditions of trickle irrigated bean. The effects of 5 irrigation levels (100%, 75%, 50%, 25%, and 0% replenishment of soil water depleted when 50% of available soil moisture was consumed in the 0.60 m soil profile depth of fully irrigated treatment) on seed yields and resulting CWSIs calculated using the empirical approach were also investigated. The highest yield and water …
Changes In Some Quality Parameters Of The Perfect Delight Nectarine Cultivar During Cold Storage And Shelf Life, Murat Çeli̇k, Ahmet Erhan Özdemi̇r, Eli̇f Ertürk
Changes In Some Quality Parameters Of The Perfect Delight Nectarine Cultivar During Cold Storage And Shelf Life, Murat Çeli̇k, Ahmet Erhan Özdemi̇r, Eli̇f Ertürk
Turkish Journal of Agriculture and Forestry
The objective of this study was to determine storage and shelf life periods of Perfect Delight nectarines grown in Mersin (Yenice, Tarsus). The fruit was kept at 0 °C and 85%-90% relative humidity for 8 weeks. After removal from cold storage at weekly intervals, the fruit was kept at 20 °C and 65%-70% relative humidity for 2, 4 or 6 days to determine shelf life in 3 replicates. Changes in weight loss (%), fruit skin color and flesh color (L*, a*, b*), fruit flesh firmness (N), total soluble solids (%), titratable acidity (g malic acid / 100 ml fruit juice), …
Agronomic Potential And Industrial Value Of Madder (Rubia Tinctorum L.) As A Dye Crop, Hasan Baydar, Tahsi̇n Karadoğan
Agronomic Potential And Industrial Value Of Madder (Rubia Tinctorum L.) As A Dye Crop, Hasan Baydar, Tahsi̇n Karadoğan
Turkish Journal of Agriculture and Forestry
Madder (Rubia tinctorum L.) is a valuable dye crop due to its roots, which are rich in anthraquinone pigments, one of them being alizarin. This study aimed to evaluate the agronomic potential and industrial value of madder plants under rainfed conditions in Southwest Anatolia, Turkey. Three different propagation materials (seeds, seedlings and root cuttings), and 5 different propagation methods (autumn root transplanting, spring root transplanting, autumn seed sowing, spring seed sowing, and spring seedling transplanting) were used in the study. At the end of the 3-year growing period, fresh root yield varied from 1640.1 kg ha^{-1} (in the spring root …
Integrated Weed Control In Sugar Beet Through Combinations Of Tractor Hoeing And Reduced Dosages Of A Herbicide Mixture, Riza Kaya, Şevki̇ Buzluk
Integrated Weed Control In Sugar Beet Through Combinations Of Tractor Hoeing And Reduced Dosages Of A Herbicide Mixture, Riza Kaya, Şevki̇ Buzluk
Turkish Journal of Agriculture and Forestry
Weed control is performed by hand in 83% of the sugar beet growing area in Turkey. Due to the movement of the labour force to industry recently, the lack of labour has led to a huge problem. Therefore, the completely mechanised alternative methods must be introduced into the weed control of sugar beet. In this study, the effects of alternative control methods, based on the use of a tractor hoe combined with post-emergence reduced herbicide dosages, on weeds and on the yield and quality of sugar beet were investigated. Our data indicated that tractor hoeing twice + thinning (96.2%) resulted …
Multiple Criteria Activity Selection For Ecotourism Planning In Igneada, Kenan Ok
Multiple Criteria Activity Selection For Ecotourism Planning In Igneada, Kenan Ok
Turkish Journal of Agriculture and Forestry
Forests have many ecotourism attractions. Ecotourism can be defined as an opportunity to promote the values in the protected areas and to finance for related stakeholders. However, ecotourism can be classified as a possible threat to ecosystems because of ecotourism's attractions are based on fragile ecological relations. Activity selection regarding ecological, social and economic dimensions is important in forest and tourism management. Ecotourism activities were selected using a multi-criteria decision model based on an ELECTRE method. The model that was applied with a participatory approach consists of 19 alternates and 28 criteria. While horse-riding was determined to be the best …
Genetic Variability, Correlation And Path Analysis Of Yield, And Yield Components In Chickpea (Cicer Arietinum L.), Derya Özveren Yücel, Adem Emi̇n Anlarsal, Celal Yücel
Genetic Variability, Correlation And Path Analysis Of Yield, And Yield Components In Chickpea (Cicer Arietinum L.), Derya Özveren Yücel, Adem Emi̇n Anlarsal, Celal Yücel
Turkish Journal of Agriculture and Forestry
This study was conducted to determine variability, heritability, and correlations between yield and yield components in 15 kabuli chickpea (Cicer arietinum L.) genotypes for 2 years. Direct and indirect effects of yield components on seed yield per plant were investigated. Genotypic variance was the highest for 1000 seed weight, followed by seed number per plant. Broad-sense heritabilities ranged from 5.47% (days to flowering) to 51.66% (seed number per plant). Heritabilities for seed number, 1000 seed weight, and number of full pods were greater than those for the other traits. Positive and significant (P < 0.05) relationships were determined between seed yield per plant and plant height, first pod height, secondary branch, total pod, and number of full pods and seeds per plant. The path coefficient analysis based on seed yield per plant, as a dependent variable, revealed that all of the other traits, except days to flowering, first pod height, and total pod number, exhibited high positive direct effects. Number of seeds and full pods showed the highest direct influence with 47.49% and 44.73%, respectively. Therefore, this research suggests that seed and full pod numbers can be good selection criteria for improving seed yield per plant in kabuli winter chickpea.
Somatic Embryogenesis From Immature Cotyledons Of Apomictic And Non-Apomictic Seeds In Walnut (Juglans Regia L.), Beki̇r Şan, Hati̇ce Dumanoğlu
Somatic Embryogenesis From Immature Cotyledons Of Apomictic And Non-Apomictic Seeds In Walnut (Juglans Regia L.), Beki̇r Şan, Hati̇ce Dumanoğlu
Turkish Journal of Agriculture and Forestry
Somatic embryogenesis from immature cotyledons of apomictic and open-pollinated seeds in some walnut (Juglans regia L.) genotypes was investigated. To obtain apomictic seeds, female flowers were bagged and/or pollinated with pollen of the apple cv. 'Golden Delicious' (Malus x domestica Borkh.). The best cotyledon stage for somatic embryogenesis was determined in open-pollinated seeds of 10 walnut genotypes. Immature cotyledons were cultured 8, 9, 10, 11 and 12 weeks after anthesis. As a result of this experiment, cotyledons of seeds thought to be of apomictic origin were cultured 8 weeks after anthesis. Driver and Kuniyuki walnut (DKW) medium supplemented with 1 …
Technical Efficiency Analysis Of Tobacco Farming In Southeastern Anatolia, Mustafa Necat Ören, Tuna Alemdar
Technical Efficiency Analysis Of Tobacco Farming In Southeastern Anatolia, Mustafa Necat Ören, Tuna Alemdar
Turkish Journal of Agriculture and Forestry
The technical efficiencies of tobacco farms in Southeastern Anatolia were estimated with parametric and non-parametric methods. Data obtained from 149 tobacco farms were used in the empirical analysis. Results obtained with an output oriented Data Envelopment Analysis (DEA) were compared to those obtained from Stochastic Frontier Analysis (SFA) and the differences are discussed. According to the results of the DEA model, mean efficiency of tobacco farmers was found to be 0.45 and 0.56 for Constant and Variable Returns to Scale (CRS and VRS) assumptions, respectively. Mean technical efficiency obtained with the SFA model was found to be 0.54. A strong …
Effect Of Salinity Stress On Dry Matter Production And Ion Accumulation In Hybrid Maize Varieties, Seli̇m Eker, Gönül Cömertpay, Ömer Konuşkan, Ahmet Can Ülger, Levent Öztürk, İsmai̇l Çakmak
Effect Of Salinity Stress On Dry Matter Production And Ion Accumulation In Hybrid Maize Varieties, Seli̇m Eker, Gönül Cömertpay, Ömer Konuşkan, Ahmet Can Ülger, Levent Öztürk, İsmai̇l Çakmak
Turkish Journal of Agriculture and Forestry
The salt stress tolerance of 19 hybrid maize (Zea mays L.) varieties was tested in nutrient solution during the early growth stage under controlled environmental conditions. For the salt stress treatment, sodium chloride (NaCl) was applied to nutrient solution at a concentration of 250 mM for 6 days before the harvest. Plants were harvested after 17 days of growth and analyzed for shoot and root dry matter production, severity of leaf damage (necrotic patches on older leaves), and the concentrations of potassium (K), sodium (Na) and calcium (Ca) in the roots and shoots. The varieties differed greatly in their response …
Effects Of Inoculation With Rhizobium On Seed Yield And Yield Components Of Common Vetch (Vicia Sativa L.), Sebahatti̇n Albayrak, Cafer Sirri Sevi̇may, Özgür Töngel
Effects Of Inoculation With Rhizobium On Seed Yield And Yield Components Of Common Vetch (Vicia Sativa L.), Sebahatti̇n Albayrak, Cafer Sirri Sevi̇may, Özgür Töngel
Turkish Journal of Agriculture and Forestry
The effects of inoculation with Rhizobium leguminosarum on seed yield and yield components of common vetch (Vicia sativa L.) were evaluated under Black Sea Coastal Region conditions, Turkey, in the 2001-2002 and 2002-2003 growing seasons using common vetch cultivars Kubilay, Ürem, Karaelçi, Uludağ, Emir, Çubuk and Nilüfer. The experiment was established as a split block design with 3 replications. Inoculation increased seed yield and all yield components of common vetch cultivars. It was observed that inoculated common vetch cultivars gave higher biological yield (8.5%), seed yield (7.6%), straw yield (10.4%), pod length (25.5%), number of seed per pod (16.2%), number …
Effects Of Some Plant Materials On Phytophthora Blight (Phytophthora Capsici Leon.) Of Pepper, Fi̇kret Demi̇rci̇, F. Sara Dolar
Effects Of Some Plant Materials On Phytophthora Blight (Phytophthora Capsici Leon.) Of Pepper, Fi̇kret Demi̇rci̇, F. Sara Dolar
Turkish Journal of Agriculture and Forestry
Effects of dried garlic, peppermint, cabbage, lentil, alfalfa, onion, radish, and garden cress plant materials on Phytophthora blight (Phytophthora capsici Leon.) of pepper were determined, in both in vitro and in vivo conditions. Extracts of the plant materials were used in vitro. The plant materials were extracted in ethanol and were added to corn meal agar (CMA) at 5 and 10 µg ml^{-1}. The extracts of alfalfa, garlic, cabbage, and peppermint reduced colony diameter of P. capsici on corn meal agar between 3.46% and 13.73%, whereas mycelial growth of P. capsici was increased by onion, radish, garden cress, and lentil …
Preliminary Results On Genome Mapping Of An Italia X Mercan Grapevine Population, Zeli̇ha Gökbayrak, Cengi̇z Özer, Gökhan Söylemezoğlu
Preliminary Results On Genome Mapping Of An Italia X Mercan Grapevine Population, Zeli̇ha Gökbayrak, Cengi̇z Özer, Gökhan Söylemezoğlu
Turkish Journal of Agriculture and Forestry
This research was conducted to construct genetic linkage maps of Vitis (2n = 38) from grape populations (60 F_1 + 2 parents) of crossing of Italia and Mercan (Vitis vinifera L.) cultivars. RAPD reactions were performed using a total of 300 RAPD primers. The amplification products were scored from negatives as presence or absence. Only 59 loci for Italia and 55 loci for Mercan could be used for linkage analysis. Mapmaker/Exp.3.0 was used for genetic linkage analysis with multipoint ordering among markers at LOD >= 3.0 score. The map was developed by using the double pseudo-testcross mapping approach. Italia and …
Saturated Hydraulic Conductivity Variation In Cultivated And Virgin Soils, Teki̇n Özteki̇n, Sabi̇t Erşahi̇n
Saturated Hydraulic Conductivity Variation In Cultivated And Virgin Soils, Teki̇n Özteki̇n, Sabi̇t Erşahi̇n
Turkish Journal of Agriculture and Forestry
Variation of saturated hydraulic conductivity (K_s) values of soils under diverse management practices may be needed to determine the required sample number, sample size, and chose suitable sample scheme for characterize the K_s values used in water flow and solute transport modelling studies. The purpose of this study was to examine the variability in K_s and try to understand some part of the determinism of this variability in virgin and adjacent cultivated field using 36 undisturbed soil samples from each location with 0.5-m grid space. K_s was measured with 100 cm^3 undisturbed soil cores in laboratory using falling or constant …
Use Of A Crop Water Stress Index For Scheduling The Irrigation Of Sunflower (Helianthus Annuus L.), Tolga Erdem, Yeşi̇m Erdem, A. Hali̇m Orta, Hakan Okursoy
Use Of A Crop Water Stress Index For Scheduling The Irrigation Of Sunflower (Helianthus Annuus L.), Tolga Erdem, Yeşi̇m Erdem, A. Hali̇m Orta, Hakan Okursoy
Turkish Journal of Agriculture and Forestry
This study was designed to evaluate different threshold crop water stress index (CWSI) values to schedule irrigation for sunflower (Helianthus annuus L.) grown under furrow irrigation. Irrigations were started when CWSI values reached 0.2, 0.4, 0.6, 0.8 and 1.0 (non-irrigation). The CWSI values were computed from measurements of canopy temperature, air temperature and atmospheric vapor pressure deficit. Total irrigation water amounts of 679, 584, 470 and 227 mm were applied to the T_{0.2}, T_{0.4}, T_{0.6} and T_{0.8} treatments, respectively. The maximum seasonal evapotranspiration (ET), 809 mm was measured from the T_{0.2} treatment. Irrigation levels significantly affected seed yield. Although the …
Comparison Of Different Irrigation Methods Based On The Parametric Evaluation Approach, Orhan Dengi̇z
Comparison Of Different Irrigation Methods Based On The Parametric Evaluation Approach, Orhan Dengi̇z
Turkish Journal of Agriculture and Forestry
The main objective of this research is to compare two different irrigation methods according to parametric evaluation system in the Field Plants Central Research Institute-Ikizce Research Farm's soils located in southern Ankara. Soil properties of the study area including texture, depth, EC, drainage, carbonate content and slope were derived from a detailed soil map scaled 1/5000. After analyzing and evaluating soil properties using geographic information system techniques, gravity and drop irrigation suitability maps were generated. Results showed that 13.1% of the study area was highly suitable for surface and gravity irrigation methods, whereas 51.2% of the study area was highly …
Genotypic Variation In Tolerance To Boron Toxicity In 70 Durum Wheat Genotypes, Ayfer A. Torun, Ati̇lla Yazici, Hali̇l Erdem, İsmai̇l Çakmak
Genotypic Variation In Tolerance To Boron Toxicity In 70 Durum Wheat Genotypes, Ayfer A. Torun, Ati̇lla Yazici, Hali̇l Erdem, İsmai̇l Çakmak
Turkish Journal of Agriculture and Forestry
By using 70 durum wheat (Triticum durum) genotypes, a greenhouse experiment has been carried out to study genotypic variation in tolerance to boron (B) toxicity in soil. Plants were grown in a soil containing 12 mg extractable B kg^{-1} soil and treated additionally with (+B: 25 mg kg^{-1} soil) and without B (-B: 0 mg B kg^{-1} soil). Following 30 days of growth, only shoots have been harvested and analyzed for dry matter production and shoot concentrations of B. There was a large genotypic variation in tolerance to B toxicity based on the severity of leaf symptoms and decreases in …
Use Of Corine Methodology To Assess Soil Erosion Risk In The Semi-Arid Area Of Beypazari, Ankara, İlhami̇ Bayrami̇n, Günay Erpul, Hakki Emrah Erdoğan
Use Of Corine Methodology To Assess Soil Erosion Risk In The Semi-Arid Area Of Beypazari, Ankara, İlhami̇ Bayrami̇n, Günay Erpul, Hakki Emrah Erdoğan
Turkish Journal of Agriculture and Forestry
Soil erosion is one of the major threats to the conservation of soil and water resources in the semi-arid and arid regions of Turkey. Therefore, there is a need to accurately assess soil erosion and accordingly determine the specific control activities adaptable to these conditions. Using the daily rainfall amounts recorded from 1958 to 2003 from 11 climate stations by the Turkish Meteorological Service in the semi-arid area of Beypazari, Ankara, Turkey, 5 different procedures of calculating the Modified Fournier Index (MFI) were performed to obtain the effect of rainfall variability and incidence of extreme storms on assessing 'Actual Soil …
Comparing The Performances Of Real-Time Kinematic Gps And A Handheld Gps Receiver Under Forest Cover, Hayati̇ Zengi̇n, Ahmet Yeşi̇l
Comparing The Performances Of Real-Time Kinematic Gps And A Handheld Gps Receiver Under Forest Cover, Hayati̇ Zengi̇n, Ahmet Yeşi̇l
Turkish Journal of Agriculture and Forestry
In forestry, to facilitate re-finding, especially permanent sample plots or some sample points in forest inventory for control, precise position information is needed. Various techniques are used to increase the performance of basic GPS (Global Positioning System) measurements and to achieve more accurate positioning. These techniques are based on the principles of relative positioning, for which 2 or more receivers are used generally. For a forest inventory, the corrected coordinates should be provided in the field and at the moment of measurement. Therefore, real-time measurements are required. The cost of GPS receivers used for sensitive measurements through relative positioning techniques …
The Replication Of The Purple-Flowered Rhododendron (Rhododendron Ponticum L.) By Seed And Chances Of Survival In Replanting In Different Media, Mustafa Var, Deryanur Di̇nçer
The Replication Of The Purple-Flowered Rhododendron (Rhododendron Ponticum L.) By Seed And Chances Of Survival In Replanting In Different Media, Mustafa Var, Deryanur Di̇nçer
Turkish Journal of Agriculture and Forestry
This study investigates the germination, replanting and survival of Rhododendron ponticum, a species native to Turkey, in different media. The conditions of the germination medium were first investigated and the seedlings obtained were applied as a first replicate in a peat medium, and at the end of 4 months a second replicate in 7 different media was used to examine their development and survival in these media. The data obtained were then compared to the data obtained from soil analysis and their relations were outlined along with statistical considerations. According to the findings, an efficient germination was observed when the …
Deficit Irrigation Analysis Of Red Pepper (Capsicum Annum L.) Using The Mathematical Optimisation Method, Cafer Gençoğlan, Serpi̇l Gençoğlan, Cuma Akbay, İsmet Boz
Deficit Irrigation Analysis Of Red Pepper (Capsicum Annum L.) Using The Mathematical Optimisation Method, Cafer Gençoğlan, Serpi̇l Gençoğlan, Cuma Akbay, İsmet Boz
Turkish Journal of Agriculture and Forestry
The objectives of this study were to analyse deficit irrigation with the mathematical optimisation method using the water-yield relationship and cost functions of red pepper, and to determine alternative deficit irrigation water levels. For this purpose, the effect of 5 different irrigation levels (I_1, I_2, I_3, I_4, and I_5) on dry yield (DY) was determined using a line source sprinkler irrigation system in Kahramanmaraş, Turkey in 1999 and 2000. The average water amounts applied with I_1 (non-water stress treatment) and I_5 (water stress treatment) for the 2 years were 913 and 296 mm, and I_2, I_3, and I_4 varied between …
Potassium Exchange Isotherms As A Plant Availability Index In Selected Calcareous Soils Of Western Azarbaijan Province, Iran, Abbas Samadi
Potassium Exchange Isotherms As A Plant Availability Index In Selected Calcareous Soils Of Western Azarbaijan Province, Iran, Abbas Samadi
Turkish Journal of Agriculture and Forestry
Potassium (K) exchange isotherms (quantity-intensity technique, Q/I) and K values derived from the Q-I relationship provide information about soil K availability. This investigation was conducted to study the relationships among K Q/I parameters, available K extracted by 1 N NH_4AOc (exchangeable K plus solution K), potassium saturation percentage (K-index, %), and the properties of 6 different calcareous agricultural soils. In addition, the relationship of tomato plant yield response to the K requirement test based on K exchange isotherms was investigated. The Q/I parameters included readily exchangeable K (\DeltaK^0), specific K sites (K_X), linear potential buffering capacity (PBC^K), and energy of …