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Articles 1441 - 1470 of 2171
Full-Text Articles in Life Sciences
Statistical Modeling Of The Effect Of Physio-Biochemical Parameters On Water Use Efficiency Of Grape Varieties, Rootstocks And Their Stionic Combinations Under Moisture Stress Conditions, Jogaiah Satisha, G. S. Prakash, R. Venugopalan
Statistical Modeling Of The Effect Of Physio-Biochemical Parameters On Water Use Efficiency Of Grape Varieties, Rootstocks And Their Stionic Combinations Under Moisture Stress Conditions, Jogaiah Satisha, G. S. Prakash, R. Venugopalan
Turkish Journal of Agriculture and Forestry
The effect of various physio-biochemical parameters on the water use efficiency (WUE) of grape varieties, rootstocks and budded vines was studied in 3 separate experiments at 3 levels of irrigation (100%, 50% and no irrigation) for 14 days of stress cycle. None of the varieties or rootstocks could survive beyond 4 days under the no irrigation treatment. Considerable genetic variability was observed for WUE with respect to photosynthetic rate, transpiration rate, stomatal conductance, root to shoot length ratio, abscisic acid, zeatin riboside, carbon isotope discrimination etc. among grape rootstocks, viz., Dogridge, 1613 C, Salt Creek, St. George and Vitis champinii …
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 …
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 …
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 …
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 …
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 …
Co-Inoculation Effects Of Phosphate Solubilizing Microorganisms And Glomus Fasciculatum On Green Gram-Bradyrhizobium Symbiosis, Almas Zaidi, Mohammad Saghir Khan
Co-Inoculation Effects Of Phosphate Solubilizing Microorganisms And Glomus Fasciculatum On Green Gram-Bradyrhizobium Symbiosis, Almas Zaidi, Mohammad Saghir Khan
Turkish Journal of Agriculture and Forestry
Experiments were conducted to evaluate the effects of nitrogen fixing (Bradyrhizobium sp. (Vigna)), phosphate solubilizing bacterium (Bacillus subtilis), phosphate solubilizing fungus (Aspergillus awamori) and AM fungus (Glomus fasciculatum) on the growth, chlorophyll content, seed yield, nodulation, grain protein, and N and P uptake of green gram plants grown in phosphorus-deficient soils. The triple inoculation of AM fungus, Bradyrhizobium sp. (Vigna) and B. subtilis significantly increased dry matter yield, chlorophyll content in foliage and N and P uptake of green gram plants. Seed yield was enhanced by 24% following triple inoculation of Bradyrhizobium + G. fasciculatum + B. subtilis, relative to …
Organic Acid Pulping Of Rice Straw. I: Cooking, M. Sarwar Jahan, Z. Z. Lee, Yongcan Jin
Organic Acid Pulping Of Rice Straw. I: Cooking, M. Sarwar Jahan, Z. Z. Lee, Yongcan Jin
Turkish Journal of Agriculture and Forestry
Acetic acid or formic acid treatment of rice straw with the variation of reaction variables, namely acid concentration, catalyst (HCl or H_2SO_4) concentration, reaction time, temperature and liquor ratio, was investigated to ascertain effects on the dissolution of hemicellulose, which facilitates the dissolution of lignin during alkaline extraction or peroxyacid treatment and improved the drainability of straw pulp. Maximum pentosan dissolution was observed in 80% acetic acid with 0.6% H_2SO_4 catalyst at 80 °C for 120 min. Acetic acid dissolved pentosan more slowly than formic acid. The catalytic activity of H_2SO_4 was higher than that of HCl with respect to …
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 …
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 …
Comparative Characterization Of The Effects Of The Climate–Tree–Growth Relationship In Anatolian Black Pine (Pinus Nigra Arnold Subsp. Pallasiana (Lamb.) Holmboe) On Wood Treatability, İlker Usta
Turkish Journal of Agriculture and Forestry
The effects of the climate-tree-growth relationship on treatability were investigated in the Anatolian black pine (Pinus nigra Arnold subsp. pallasiana (Lamb.) Holmboe) based on the altitudinal locations at approximately 960 m (B1) and 1010 m (B2) in the former coniferous afforestation area in Beytepe, Ankara, Turkey. This was achieved by analysis of the 1º branches at 1, 2, and 3 m tree heights above ground level for the periods 82/98 (March 1982 to February 1998) and 98/04 (March 1998 to February 2004). It appeared that the climatic changes during the period 98/04 had a greater effect on the growth of …
Gge-Biplot Analysis Of Multi-Environment Yield Trials In Bread Wheat, Yüksel Kaya, Mevlüt Akçura, Seyfi̇ Taner
Gge-Biplot Analysis Of Multi-Environment Yield Trials In Bread Wheat, Yüksel Kaya, Mevlüt Akçura, Seyfi̇ Taner
Turkish Journal of Agriculture and Forestry
Yield data of 25 bread wheat genotypes tested across 9 rain-fed environments during the 2002-2003 growing season were analyzed using the GGE (i.e. G, genotype + GEI, genotype-by-environment interaction) biplot method. E (environment) explained 81% of the total (G + E + GE) variation, whereas G and GEI captured 7.3% and 11.7%, respectively. The first 2 principal components (PC1 and PC2) were used to create a 2-dimensional GGE-biplot and explained 46.2% and 15.8% of GGE sum of squares (SS), respectively. Genotypic PC1 scores >0 detected the adaptable and/or higher-yielding genotypes, while PC1 scores
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 …
A Comparison Of The Development Times Of Trissolcus Rufiventris (Mayr) And Trissolcus Simoni Mayr (Hym.: Scelionidae) At Three Constant Temperatures, Müjgan Kivan, Ni̇hal Kiliç
A Comparison Of The Development Times Of Trissolcus Rufiventris (Mayr) And Trissolcus Simoni Mayr (Hym.: Scelionidae) At Three Constant Temperatures, Müjgan Kivan, Ni̇hal Kiliç
Turkish Journal of Agriculture and Forestry
The effects of temperature on the development of the egg parasitoids Trissolcus rufiventris (Mayr) and Trissolcus simoni Mayr (Hym.: Scelionidae) were determined at 3 constant temperatures. Female development ranged from 6.9 days at 32 °C to 22.5 days at 20 °C for T. rufiventris, and from 9.2 days at 32 °C to 24.7 days at 20 °C for T. simoni. The average development time of males was shorter than that of females for each parasitoid species. The development of female T. rufiventris required 125.0 degree-days above the theoretical threshold of 15.5 °C and that of males required 111.1 degree-days above …
Agro-Morphological Characterization Of Some Wild Wheat (Aegilops L. And Triticum L.) Species, Alpteki̇n Karagöz, Necmi̇ Pi̇lanali, Turgay Polat
Agro-Morphological Characterization Of Some Wild Wheat (Aegilops L. And Triticum L.) Species, Alpteki̇n Karagöz, Necmi̇ Pi̇lanali, Turgay Polat
Turkish Journal of Agriculture and Forestry
Wild wheat (Aegilops L. and Triticum L.) populations were collected from different regions of Turkey and characterized for 5 basic traits, in order to study their agro-morphological characteristics and variation among populations. Material of the study consisted of 112 populations of wild wheat and 12 populations of cultivated wheat. Cultivated einkorn (T. monococcum L. subsp. monococcum) and cultivated emmer (T. turgidum L. subsp. dicoccon (Shrank) Thell.) were used as checks for Triticum species. Among the Aegilops material studied, Ae. tauschii Coss. var. meyeri (Griseb. ex Ledeb.) has not been defined in the flora of Turkey before and is characterized agromorphologically …
Inheritance Of Cold Tolerance In Common Wheat (Triticum Aestivum L.), Omid Sofalian, Seyyed Abolghasem Mohammadi, Saeid Aharizad, Mohammad Moghaddam, Mohammad Reza Shakiba
Inheritance Of Cold Tolerance In Common Wheat (Triticum Aestivum L.), Omid Sofalian, Seyyed Abolghasem Mohammadi, Saeid Aharizad, Mohammad Moghaddam, Mohammad Reza Shakiba
Turkish Journal of Agriculture and Forestry
Low temperature is one of the most severe abiotic stresses limiting wheat growth, productivity, and distribution. Understanding the genetic nature of cold and frost tolerance is regarded as the primary step in wheat breeding programs. This study used a winter wheat cultivar, Norstar, which has a high level of cold tolerance (LT_{50} = -22.3 ºC), and a highly cold-susceptible Iranian spring wheat variety, Zagros (LT_{50} = -3.5 °C), as parental lines to develop different generations. Seven generations, P_1, P_2, F_1, F_2, F_{2:3}, BC_1, and BC_2, were used for generation mean and generation variance analysis for estimating genetic effects and variances, …
The Effect Of Zinc On Growth And Shoot Concentrations Of Sodium And Potassium In Pepper Plants Under Salinity Stress, Hakan Aktaş, Kazim Abak, Levent Öztürk, İsmai̇l Çakmak
The Effect Of Zinc On Growth And Shoot Concentrations Of Sodium And Potassium In Pepper Plants Under Salinity Stress, Hakan Aktaş, Kazim Abak, Levent Öztürk, İsmai̇l Çakmak
Turkish Journal of Agriculture and Forestry
The effect of increasing concentrations of zinc (Zn) on NaCl toxicity was studied in pepper (Capsicum annuum L. cv. Kahramanmaras-3) plants grown in a growth chamber under controlled conditions. Plants were grown in severely Zn-deficient soil with increasing Zn (0, 2, and 10 mg Zn kg^{-1} soil) and NaCl (0%, 0.5% and 1.5% NaCl in irrigation water) treatments. After 46 days of growth, the plants were harvested and the shoots were analyzed for dry matter production, concentrations of Zn, sodium (Na), potassium (K), and phosphorous (P), and K/Na ratios. The results showed that Zn deficiency in soil significantly reduced shoot …
Use Of Remote Sensing And Geographic Information System Technologies For Developing Greenhouse Databases, Namik Kemal Sönmez, Mustafa Sari
Use Of Remote Sensing And Geographic Information System Technologies For Developing Greenhouse Databases, Namik Kemal Sönmez, Mustafa Sari
Turkish Journal of Agriculture and Forestry
This model study was conducted in Antalya region greenhouses for the determination and registration of agricultural resources as a part of adjustment efforts for the European Union (EU) Common Agricultural Policy (CAP). The aim was to create new database systems based on remote sensing (RS) and geographic information systems (GIS), rather than conventional land measurement techniques. For this purpose, glass and plastic greenhouses were determined by visual data analysis of satellite image, and databases were created for each greenhouse by GIS. These databases included area, coordinates and other characteristics of each greenhouse. These databases were prepared in a format that …
Spectral Sensing Of Aphid (Hemiptera: Aphididae) Density Using Field Spectrometry And Radiometry, Mustafa Mi̇ri̇k, Gerald J. Michels
Spectral Sensing Of Aphid (Hemiptera: Aphididae) Density Using Field Spectrometry And Radiometry, Mustafa Mi̇ri̇k, Gerald J. Michels
Turkish Journal of Agriculture and Forestry
The greenbug, Schizaphis graminum (Rondani), and bird cherry-oat aphid, Rhopalosiphum padi L., are aphid pests of wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), sorghum (Sorghum bicolor L.), oat (Avena sativa L.), and other cereals worldwide. Greenbug and bird cherry-oat aphid infestation in crops is unpredictable over space and time. From these 2 aphids, greenbug infestation causes significant reduction in yield, and consequently large amounts of insecticides are used to control greenbug populations. Therefore, a repeatable and rapid method is necessary for monitoring aphid populations. Remote sensing appears promising for the monitoring of aphid density in crops. The present research …
Cambial Activity Of The Sessile Oak (Quercus Petraea) In Belgrade Forest, İstanbul, Ünal Akkemi̇k, Hati̇ce Çinar Yilmaz, Orhan Sevgi̇
Cambial Activity Of The Sessile Oak (Quercus Petraea) In Belgrade Forest, İstanbul, Ünal Akkemi̇k, Hati̇ce Çinar Yilmaz, Orhan Sevgi̇
Turkish Journal of Agriculture and Forestry
The cambium activity of Quercus petraea (Mattuscha) Liebl. (sessile oak) in Atatürk Arboretum (Belgrade Forest, İstanbul) was studied by mounting 5 manual and 5 electronic dendrometers on 5 dominant trees very near to each other (2-5 m). Cambium activity began during the first week of May in 2003, and 1 month earlier, the first week of April, in 2004. The fast growing season for both years was May to July, accounting for 90% of diameter increase. Earlywood/latewood ratios measured on tree rings varied principally with changes in latewood widths, as affected by climate. The highest and most significant correlations were …
Pathogenicity Of Paecilomyces Spp. To The Glasshouse Whitefly, Trialeurodes Vaporariorum, With Some Observations On The Fungal Infection Process, Ayhan Gökçe, M. Kubi̇lay Er
Pathogenicity Of Paecilomyces Spp. To The Glasshouse Whitefly, Trialeurodes Vaporariorum, With Some Observations On The Fungal Infection Process, Ayhan Gökçe, M. Kubi̇lay Er
Turkish Journal of Agriculture and Forestry
This study was carried out to determine the infection rates of 9 Paecilomyces fumosoroseus isolates and 1 Paecilomyces lilacinus isolate on the glasshouse whitefly (GWF), Trialeurodes vaporariorum. Furthermore, the infection progress of P. fumosoroseus was observed on the insect using light and scanning electron microscopes. Bioassays were carried out on second instar nymphs by the application of a spore suspension of each isolate. The mortality data were recorded 3 and 6 days after the application. The effect of Paecilomyces isolates increased as the incubation time was extended. Seven isolates caused significant mortality to the GWF nymphs. The most virulent isolates, …
Temperature Dependent Life History Traits Of Brevicoryne Brassicae (L.) (Hom., Aphididae) On White Cabbage, Serdar Satar, Ulrich Kersting, M. Rifat Ulusoy
Temperature Dependent Life History Traits Of Brevicoryne Brassicae (L.) (Hom., Aphididae) On White Cabbage, Serdar Satar, Ulrich Kersting, M. Rifat Ulusoy
Turkish Journal of Agriculture and Forestry
The developmental time, survival rate and reproduction of the cabbage aphid, Brevicoryne brassicae (L.) (Homoptera, Aphididae), were evaluated on detached cabbage leaves (Brassicae oleracea var. capitata) at four constant and two alternating temperatures (15, 20, 25, 30, 25/30 and 30/35 ºC). Developmental periods of immature stages ranged from 12.5 days at 15 ºC to 6.0 days at 25/30 ºC. The alternating temperature of 30/35 ºC was lethal to immature stages of B. brassicae. The lower developmental threshold for the cabbage aphid was estimated at 4.0 ºC and it required 142.9 degree-days for a first instar to become an adult. The …
Effect Of Early Season Drought Stress On Growth Characteristics Of Sugar Beet Genotypes, Rahim Mohammadian, M. Moghaddam, Hassan Rahimian, S. Y. Sadeghian
Effect Of Early Season Drought Stress On Growth Characteristics Of Sugar Beet Genotypes, Rahim Mohammadian, M. Moghaddam, Hassan Rahimian, S. Y. Sadeghian
Turkish Journal of Agriculture and Forestry
This study was conducted to determine the effects of early season drought stress on some plant characteristics of 9 sugar beet genotypes in the Khorasan Agricultural and Natural Resource Research Station, NE Iran. The experimental design was a split plot with a randomized complete block arrangement. Leaf area index, leaf dry weight, shoot dry weight and root dry weight decreased under drought stress compared to non-stress conditions. The decrease was more pronounced as the rate of stress increased. Leaf area index was more affected by water stress than was leaf weight (losses of leaf area indices were 14.1% and 66.6% …
Functional Response Of Two Coccinellid Predators, Scymnus Levaillanti And Cycloneda Sanguinea, To The Cotton Aphid, Aphis Gossypii, Ali̇ Arda Işikber
Functional Response Of Two Coccinellid Predators, Scymnus Levaillanti And Cycloneda Sanguinea, To The Cotton Aphid, Aphis Gossypii, Ali̇ Arda Işikber
Turkish Journal of Agriculture and Forestry
Functional responses of 2 female coccinellid predators, Scymnus levaillanti and Cycloneda sanguinea, to the cotton aphid, Aphis gossypii, at various temperatures were studied under laboratory conditions. Both coccinellid species showed different functional responses to the cotton aphid. The larger species, C. sanguinea, was seen to eat more aphids than the smaller species, S. levaillanti, at each temperature, due to its greater voracity. The female adults of both coccinellid species feed maximally during the first 3 h and therefore, the increase in fresh weight gain and number of aphids killed by both coccinellid species are much higher during the first 3 …
Genotype-Environment Interaction And Phenotypic Stability Analysis For Grain Yield Of Durum Wheat In The Central Anatolian Region, Mevlüt Akçura, Yüksel Kaya, Seyfi̇ Taner
Genotype-Environment Interaction And Phenotypic Stability Analysis For Grain Yield Of Durum Wheat In The Central Anatolian Region, Mevlüt Akçura, Yüksel Kaya, Seyfi̇ Taner
Turkish Journal of Agriculture and Forestry
The objectives of this research were to assess genotype-environment (GE) interaction and to determine stable durum wheat (Triticum turgidum var. durum Desf.) genotypes for grain yield in the Central Anatolia. Thirteen durum wheat genotypes were evaluated under rainfed conditions using a randomized complete block design with 4 replications. The study was repeated for 2 years and at 3 different locations around Central Anatolia, Turkey. GE interaction was analyzed using linear regression techniques. There was considerable variation for grain yield among both genotypes and environments. Stability was estimated using the Eberhart and Russell method. According to the stability analysis, genotype 10 …
Simulation Of A Feedback Control Technique Through Irrigation Canal Junctions, Ömer Faruk Durdu
Simulation Of A Feedback Control Technique Through Irrigation Canal Junctions, Ömer Faruk Durdu
Turkish Journal of Agriculture and Forestry
A linear quadratic controller based algorithm was developed for simulating the dynamics of a single-reach irrigation canal with a channel junction. Using the concepts of feedback control theory, an expression for an upstream gate opening of an irrigation canal reach with a channel junction operated based upon a constant-level control was obtained. In the derivation, the canal reach between 2 gates was divided into 5 nodes, and the finite difference forms of the continuity and momentum equations were written for each node. The Taylor series was applied to linearize the equations around equilibrium conditions. At the third node of the …
Severity And Spatial Distribution Of Boron Toxicity In Barley Cultivated Areas Of Central Anatolia And Transitional Zones, Muzaffer Avci, Taner Akar
Severity And Spatial Distribution Of Boron Toxicity In Barley Cultivated Areas Of Central Anatolia And Transitional Zones, Muzaffer Avci, Taner Akar
Turkish Journal of Agriculture and Forestry
The aim of this study was to determine the severity and spatial distribution of boron toxicity symptoms on barley cultivated areas in Central Anatolia and Transitional Zones (CATZs). Boron concentrations of plants sampled from barley cultivated areas of the CATZs region at 189 sites during springs 1996 and 1997 were determined. Boron toxicity symptoms were observed mainly in small areas near Konya-Çumra, Ankara-Gölbaşı, Yenikent and Yozgat-Yerköy and between the provinces of Konya and Aksaray. While boron toxicity symptoms were not observed in 79% of samples, 15% and 6% of samples showed light and medium-severe toxicity symptoms, respectively. As boron toxicity …
Comparison Of Methodologies For The Identification Of Aroma Compounds In Strawberry, Ebru Kafkas, Sali̇h Kafkas, Margery Koch-Dean, Wilfried Schwab, Olga Larkov, Noa Lavid, Einat Bar, Uzi Ravid, Efraim Lewinsohn
Comparison Of Methodologies For The Identification Of Aroma Compounds In Strawberry, Ebru Kafkas, Sali̇h Kafkas, Margery Koch-Dean, Wilfried Schwab, Olga Larkov, Noa Lavid, Einat Bar, Uzi Ravid, Efraim Lewinsohn
Turkish Journal of Agriculture and Forestry
Three strawberry (Fragaria x ananassa. Duch.) varieties commercially grown in Israel (Tamar, Yael and Malach) were studied for their volatile compositions. Two techniques were compared: headspace solid phase micro extraction (HS-SPME) and liquid-liquid extraction (organic solvent: tert-butyl methyl ether) by gas chromatography/mass spectrometry (GC/MS). The influences of techniques on the volatile compounds were tested by comparing the volatiles determined in the 3 varieties. Malach, the most aromatic variety, accumulates high levels of furanones and esters compared to the other varieties. Differences in the aroma profiles obtained by utiliszing different techniques were noted. HS-SPME was more suitable for the determination of …
Effects Of Reduced Tillage And Planting Systems On Seed Cotton Yield And Quality, İbrahi̇m Yalçin, Aydin Ünay, Rauf Uçucu
Effects Of Reduced Tillage And Planting Systems On Seed Cotton Yield And Quality, İbrahi̇m Yalçin, Aydin Ünay, Rauf Uçucu
Turkish Journal of Agriculture and Forestry
There is increasing scientific and practical interest in the importance of reduced tillage systems for increasing yield, and obtaining it more economically, in cotton production. Reduced tillage systems which involve lesser field applications have several advantages when compared to conventional systems. Field trials were conducted over 2 years. The aim was to establish the greatest applicability of reduced tillage systems. The 4 types of tillage compared were conventional, precision, strip and ridge tillage. In each of these plots, seeds were planted in 8 rows. A mechanical seed drill was used in 4 rows of each plot at a seed rate …
Using Real Options Theory To Analyze The Impacts Of Urban Development On Farm Real Estate Markets, Tamer Işgin, D. Lynn Forster
Using Real Options Theory To Analyze The Impacts Of Urban Development On Farm Real Estate Markets, Tamer Işgin, D. Lynn Forster
Turkish Journal of Agriculture and Forestry
This paper assesses the real option values of farmland using data from Ohio, USA. The option value of delaying the sale of a farm property was measured using an emerging, relatively new theory namely, the theory of real options pricing. As opposed to standard corporate finance theory, this new theory incorporates both the uncertainty about the future net benefits of a selling decision and the irreversibility of this action taken. Results from this option value calculation show that the vast majority of real call option values calculated for this sample are greater than zero, suggesting that deferring the decision to …