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Articles 1561 - 1590 of 2171
Full-Text Articles in Life Sciences
Potassium Potential Of The Soils Of The Gevaş Region In Eastern Anatolia, Keri̇m Mesut Çi̇mri̇n, Emrah Akça, Muzaffer Şenol, Gökhan Büyük, Seli̇m Kabur
Potassium Potential Of The Soils Of The Gevaş Region In Eastern Anatolia, Keri̇m Mesut Çi̇mri̇n, Emrah Akça, Muzaffer Şenol, Gökhan Büyük, Seli̇m Kabur
Turkish Journal of Agriculture and Forestry
Due to its semi-arid climate and sloping topography, Eastern Anatolia has limited soil resources for agriculture, strongly necessitating sustainable land management. Fertile soils occur only in limited areas such as the Gevaş region, where sugar beet is one of the main crops with a particular need for K. Unfortunately, studies on the non-exchangeable (slowly available) and exchangeable K contents, along with soil properties such as clay mineralogy, organic matter content and texture, which are closely related to soil production potential, are not sufficient in the region. Thus, 40 soil samples out of 7 soil series were collected for the determination …
Main Organic Acid Distribution Of Authentic Citrus Juices In Turkey, Feryal Karadeni̇z
Main Organic Acid Distribution Of Authentic Citrus Juices In Turkey, Feryal Karadeni̇z
Turkish Journal of Agriculture and Forestry
Nineteen authentic citrus juice samples (6 tangerine, 4 sweet orange, 4 grapefruit, 4 lemon and 1 sour orange) were investigated with respect to organic acid distribution. Average citric, malic and fumaric acid contents of tangerine juices were 9.22 g l^{-1}, 5.29 g l^{-1} and 368 µg l^{-1}, respectively. These values for orange juices were 13.28 g l^{-1}, 7.79 g l^{-1} and 373 µg l^{-1}, respectively. The citric acid concentration in lemon juices, having the highest acidity, varied between 48.54 and 60.32 g l^{-1}. It was followed by grapefruit juices with an average 19.61 g l^{-1} citric acid content. In all …
A New Method Of Designing Forest Roads, Abdullah E. Akay
A New Method Of Designing Forest Roads, Abdullah E. Akay
Turkish Journal of Agriculture and Forestry
An unlimited number of alternative paths can be generated to connect 2 end points. Modern optimization techniques, which perform a systematic search for an optimum solution, can be used to solve such complex problems. In the field of highway design, various optimization techniques have been applied to locate a path between 2 known locations. However, there has been little optimization application in current forest road design systems. These systems are used as a tool to perform the mathematical calculations required to make basic manual road design. This study introduces a new method that integrates 2 optimization techniques for designing forest …
Determining Suitable Investment Areas For The Forest Products Industry: An Example From The Black Sea Region In Turkey, Kadri̇ Cemi̇l Akyüz, İlker Akyüz, Hasan Seri̇n, Hi̇cabi̇ Cindik
Determining Suitable Investment Areas For The Forest Products Industry: An Example From The Black Sea Region In Turkey, Kadri̇ Cemi̇l Akyüz, İlker Akyüz, Hasan Seri̇n, Hi̇cabi̇ Cindik
Turkish Journal of Agriculture and Forestry
Investment decisions and regional development are significant for economic development and the welfare of society. The most suitable decision should be made by using multivariable statistical techniques in both public and private sector investments, because various factors may affect such investments. In this study the aim was to direct the preferences of private sector investments in the forest products industry in the Black Sea region, which lags behind the other regions from the point of view of economic development and has an unstable development situation. With this aim, cities with advantages and investment priorities were determined. Principal component analysis (PCA) …
Effect Of Some Factors On The Strength Of Furniture Corner Joints Constructed With Wood Biscuits*, Ali̇ Naci̇ Tankut, Nurgül Tankut
Effect Of Some Factors On The Strength Of Furniture Corner Joints Constructed With Wood Biscuits*, Ali̇ Naci̇ Tankut, Nurgül Tankut
Turkish Journal of Agriculture and Forestry
This study was carried out to evaluate the bending moment resistance and stiffness of case-type furniture corner joints constructed with wood biscuits, and to determine the effects on these joints of some factors including the spacing between wood biscuit hole centers, the distance from the center of the biscuit hole to the corresponding outside edge of the board material, the method of loading, the type of composite board, and the gluing technique. The results indicated that corner joint strength comes mainly from the edge gluing of the face and butt member and not from the glued biscuits. Particleboard (PB) glued …
Determining The Effects Of Vibration Parameters And Packaging Method On Mechanical Damage In Golden Delicious Apples, Kubi̇lay K. Vursavuş, Faruk Özgüven
Determining The Effects Of Vibration Parameters And Packaging Method On Mechanical Damage In Golden Delicious Apples, Kubi̇lay K. Vursavuş, Faruk Özgüven
Turkish Journal of Agriculture and Forestry
This research was conducted to evaluate the effects of vibration frequency, vibration acceleration, packaging method, and vibration duration on the mechanical damage during apple transportation. The research was performed in 3 stages. Firstly, vibration frequency and vibration acceleration were measured on the truck-bed for determining the vibration frequency and acceleration distribution. Secondly, packaging transmissibility and vibration frequency sensitivity for all the packaging methods used in this research were measured. Thirdly, a laboratory vibrator, which simulates the road transportation under laboratory conditions, was used to obtain some factors influencing the mechanical damage during apple transportation. According to the results measured on …
Comparison Of Irrigation Performance Based On The Basin, Crop Pattern, And Scheme Sizes Using External Indicators, Hasan Merdun
Comparison Of Irrigation Performance Based On The Basin, Crop Pattern, And Scheme Sizes Using External Indicators, Hasan Merdun
Turkish Journal of Agriculture and Forestry
A comparative assessment allows screening of irrigation systems based on the key issues relative to performance and indicates where improvements should be made, such as in type of management, infrastructure, crop pattern and intensity, and system size. The objective of this study was to assess the performance of 239 irrigation schemes (57 DSI-operated and 182 transferred to Irrigation Associations) based on the basin, crop pattern, and scheme sizes using 6 external indicators for 2001. The basins that grow mostly orchard and industrial crops have higher output per unit land and water than that of the basins that mostly grow cereals. …
Density Of Centaurea Solstitialis L. And Its Natural Enemies Ceratapion Spp. In Southern Turkey, Si̇bel Uygur
Density Of Centaurea Solstitialis L. And Its Natural Enemies Ceratapion Spp. In Southern Turkey, Si̇bel Uygur
Turkish Journal of Agriculture and Forestry
Centaurea solstitialis L., yellow star thistle, is an annual weed that belongs to the family Asteraceae. In Turkey, this weed can be found in pasture areas, along roadsides, in cultivated areas and in field margins. Yellow star thistle is native to Mediterranean and western Asian countries. Alternative management strategies to chemical control have been and still are being studied; for example, management strategies to control this weed in the USA concentrate on the biological control approach. In addition, chemical control methods in pasture areas are banned in Turkey, which led us to carry out this field study. The average percentage …
Effect Of Tissue On The Inoculation And Detection Of Xylella Fastidiosa In The Grapevine, Ni̇hal Buzkan, M. Andrew Walker
Effect Of Tissue On The Inoculation And Detection Of Xylella Fastidiosa In The Grapevine, Ni̇hal Buzkan, M. Andrew Walker
Turkish Journal of Agriculture and Forestry
Pierce's disease of the grapevine is caused by a xylem-limited bacterium, Xylella fastidiosa (Xf). Susceptible vines die within a few years after infection. However, the mechanism of pathogenesis is not fully understood. It is very important to optimize the timing and positioning of inoculation in host plants to study the infection process. Rooted dormant cuttings of cv. Chardonnay (susceptible vine) were grouped as stem tissue hardening and shoot elongation for needle-inoculation with 20 µl of 2 x 10^8 cfu ml^{-1} of Xf suspension. The infected plants were sampled 2 and 3 weeks following postinoculation (wpi) at 10 cm above the …
Determination Of Optimum Weed Control Timing In Maize (Zea Mays L.), M. Nedi̇m Doğan, Aydin Ünay, Özhan Boz, Fi̇li̇z Albay
Determination Of Optimum Weed Control Timing In Maize (Zea Mays L.), M. Nedi̇m Doğan, Aydin Ünay, Özhan Boz, Fi̇li̇z Albay
Turkish Journal of Agriculture and Forestry
In field experiments conducted in 2001 and 2002, the optimum timing for weed control in maize was investigated. Both experiments were designed according to randomized complete blocks, and Cyperus rotundus L., Amaranthus retroflexus L., Portulaca oleracea L. and Chenopodium album L. were naturally infested on experimental plots in both years. The study in 2001 was conducted to determine the critical period for weed control for maize. With this aim plots were maintained weed-free or weedy for different periods based on crop growth stage. The relationships between grain yield and different weedy or weed-free periods were determined via regression analyses in …
Harvest Date Influences Superficial Scald Development In Granny Smith Apples During Long Term Storage, Mustafa Erkan, Mustafa Pekmezci̇
Harvest Date Influences Superficial Scald Development In Granny Smith Apples During Long Term Storage, Mustafa Erkan, Mustafa Pekmezci̇
Turkish Journal of Agriculture and Forestry
The effects of harvest dates on superficial scald development and postharvest quality in 'Granny Smith' apples (Malus domestica Borkh.) were investigated. Apples were harvested at 15-day intervals during 2 consecutive years (2000-2001) and stored at 0 °C with 90% relative humidity for 8 months. At the end of the 8 - month storage period plus an additional 1 week at 20 °C the percentage of superficial scald was lower (24.4%) in late harvested (November 15) apples than in apples harvested early (October 15), which was 85.4%. The apples harvested late reached a climacteric maximum quicker than those harvested early. The …
Effects Of Inoculation With Rhizobium On Forage Yield And Yield Components Of Common Vetch (Vicia Sativa L.), Sebahatti̇n Albayrak, Cafer Sirri Sevi̇may, Özgür Töngel
Effects Of Inoculation With Rhizobium On Forage 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 on forage yield and yield components of common vetch (Vicia sativa L.) were evaluated under rainy conditions in Samsun, Turkey, in the 2001-2002 and 2002-2003 growing seasons. Common vetch cultivars Kubilay, Ürem, Kara elçi, Uludağ, Emir, Çubuk, Nilüfer and Rhizobium leguminosarum were used as materials. The experiment was established as a split block design with 3 replicates as averages of 2 years. While the highest forage and dry matter yields were determined in the inoculated cultivar Kara elçi, the highest crude protein content and crude protein yield were obtained from the inoculated cultivars Kubilay …
Effect Of Foliar Iron Applications At Different Growth Stages On Iron And Some Nutrient Concentrations In Strawberry Cultivars, İbrahi̇m Erdal, Kahraman Kepenek, İlhan Kizilgöz
Effect Of Foliar Iron Applications At Different Growth Stages On Iron And Some Nutrient Concentrations In Strawberry Cultivars, İbrahi̇m Erdal, Kahraman Kepenek, İlhan Kizilgöz
Turkish Journal of Agriculture and Forestry
This study was conducted to investigate the effect of foliar Fe applications on leaf Fe and some nutrient (P, Ca, Mg, K, Mn and Zn) concentrations in strawberry (Fragaria vesca L.) cultivars. For this purpose, 2 forms of Fe solutions (FeSO_4. 7 H_2O and Fe-EDTA) containing 0.28% Fe were sprayed onto the strawberry leaves at 3 growth stages (before blooming, first blooming, full blooming). Depending on the Fe sources, Fe concentration increased after each application. Before blooming, leaf Fe concentration increased from 60 mg kg^{-1} (control) to 127 and 105 mg kg^{-1} with Fe-EDTA and FeSO_4. 7 H_2O, respectively. During …
Effect Of Different Operating Parameters On Seed Holding In The Single Seed Metering Unit Of A Pneumatic Planter, Zeli̇ha Bereket Barut, Azi̇z Özmerzi̇
Effect Of Different Operating Parameters On Seed Holding In The Single Seed Metering Unit Of A Pneumatic Planter, Zeli̇ha Bereket Barut, Azi̇z Özmerzi̇
Turkish Journal of Agriculture and Forestry
This research was performed to determine the effect of different operating parameters on seed holding in a single seed metering unit. The metering unit was a vertical seed plate with a vacuum, used in seeding maize (Zea mays L.). An electronic counter in the metering unit was used to determine the holes without seed on the plate holes. The shapes of the holes, peripheral velocities, vacuum pressure, hole area on the seed plate and thousand grain weight of seed (TGW) were chosen as the operating parameters. A Factorial Completely Randomized Design was used for analysis of variance, Duncan's multiple range …
Measuring The Marketing Performances Of State Nurseries In Turkey: Examples Of Eastern Anatolia And Black Sea Region Nurseries, Devlet Toksoy, Hasan Ayyildiz
Measuring The Marketing Performances Of State Nurseries In Turkey: Examples Of Eastern Anatolia And Black Sea Region Nurseries, Devlet Toksoy, Hasan Ayyildiz
Turkish Journal of Agriculture and Forestry
Today, any enterprise has to consider marketing as important as production. Production and marketing are 2 complementary activities in enterprises. An increase in marketing effectiveness is achieved through measuring the activity outcomes that can be described as marketing performance. Because marketing is a social science and, therefore, determining the marketing performance system concretely, examining it and determining its principles may not be possible, a need for a new model was felt to represent the real system, and, consequently, a Multi-Dimensional Purpose-System Model was developed. The above-mentioned model was applied in the 12 Nursery Directorates in the Eastern Anatolia and Black …
Effects Of Different Soil Salinity Levels On Germination And Seedling Growth Of Safflower (Carthamus Tinctorius L.), Mehmet Demi̇r Kaya, Ari̇f İpek, Ahmet Öztürk
Effects Of Different Soil Salinity Levels On Germination And Seedling Growth Of Safflower (Carthamus Tinctorius L.), Mehmet Demi̇r Kaya, Ari̇f İpek, Ahmet Öztürk
Turkish Journal of Agriculture and Forestry
Safflower (Carthamus tinctorius L.) is rated as moderately salt tolerant and it can produce profitable crops on saline soils. It is slightly more tolerant of salinity than barley but is more tolerant than wheat. Because salinity reduces germination and delays emergence, safflower stands tend to be irregular and crop yield is depressed. However, some varieties are less affected by salinity than others. In this study, we aimed to determine the effects of soil salinity levels (0.8, 2.5, 5.1, 8.7, 13.0, 15.2 and 23.0 dS m^{-1}) on germination and seedling growth of three safflower varieties, one of which is spiny (5-154 …
Determination Of Salt Tolerance Of Stock (Matthiola Tricuspidata) As A Potential Oil Crop, Mehmet Ali̇ Demi̇ral
Determination Of Salt Tolerance Of Stock (Matthiola Tricuspidata) As A Potential Oil Crop, Mehmet Ali̇ Demi̇ral
Turkish Journal of Agriculture and Forestry
In this study the salt tolerance of stock (Matthiola tricuspidata) was investigated. For this purpose, a control and 4 different concentrations of NaCl + CaCl_2 were applied to plants grown under greenhouse conditions. Na, Cl and electrical conductivity (EC) analyses were conducted in soil, plant and leached samples. Yield, plant growth parameters and plant dry matter were also determined. All plants survived until the end of the experiments. Treatments affected the ion content and EC of leached and soil samples significantly. Increasing salinity conditions increased translocation of Na and Cl in plants. Flower numbers, seedpod numbers, and dry matter content …
Litter Decomposition Of Picea Orientalis, Pinus Sylvestris And Castanea Sativa Trees Grown In Artvin In Relation To Their Initial Litter Quality Variables, Temel Sariyildiz
Litter Decomposition Of Picea Orientalis, Pinus Sylvestris And Castanea Sativa Trees Grown In Artvin In Relation To Their Initial Litter Quality Variables, Temel Sariyildiz
Turkish Journal of Agriculture and Forestry
The aim of the present study was to determine the effects of the litter chemistry of spruce (Picea orientalis), pine (Pinus sylvestris) and chestnut (Castanea sativa) grown in the Artvin region on their decomposition rates. Freshly fallen litters from these species were analysed for total carbon, nitrogen, lignin, cellulose and hemicellulose. The litterbag technique was used to determine their mass loss in the field for 2 years. At intervals of 6, 12, 18 and 24 months, 5 litterbags of each species were collected and returned to the laboratory and then analysed for their mass losses. The results showed that differences …
Combustion Properties Of Calabrian Pine (Pinus Brutia Ten.) Wood Treated With Vegetable Tanning Extracts And Boron Compounds, Ergün Baysal, M. Kemal Yalinkiliç, Mehmet Çolak, Osman Göktaş
Combustion Properties Of Calabrian Pine (Pinus Brutia Ten.) Wood Treated With Vegetable Tanning Extracts And Boron Compounds, Ergün Baysal, M. Kemal Yalinkiliç, Mehmet Çolak, Osman Göktaş
Turkish Journal of Agriculture and Forestry
Specimens prepared from Calabrian pine (Pinus brutia Ten.) wood were treated with borate-supplemented aqueous solutions of Calabrian pine bark powder, acorn powder, sumach leaf powder and gall-nut powder. Then, fire test methods containing flame source, without flame source and glowing stages was performed according to the ASTM E 160-50 American Standard. The results showed that the lowest temperature (323 °C) for the flame source stage was recorded for specimens treated with mixtures of boric acid and borax (BA and Bx). In the without flame stage, the lowest temperature (404 °C) was recorded for specimens treated with acorn powder and (BA …
Comparative Study Of Wood Density By Specific Amount Of Void Volume (Porosity), İlker Usta
Comparative Study Of Wood Density By Specific Amount Of Void Volume (Porosity), İlker Usta
Turkish Journal of Agriculture and Forestry
Various methods were progressively investigated to determine wood density within the most reliable void volume (porosity) values. Three softwood species of Bornmulleriana fir (Abies bornmulleriana Mattf.), Eastern spruce (Picea orientalis Lipsky), and Scots pine (Pinus sylvestris L.) grown indigenously in Turkey were selected to obtain a comparison among the green volume (GV), oven dry (OD) and maximum moisture content (MMC) methods. Volume definition had a great effect on density, which tended to vary significantly between and also within species caused by differences in the ratio of cell wall to air spaces. Accordingly: (a) GV might not give more accurate density …
Evaluation Of Land Use Potential And Suitability Of Ecosystems In Antakya For Reforestation, Recreation, Arable Farming And Residence, Şeref Kiliç, Suat Şenol, Fati̇h Evrendi̇lek
Evaluation Of Land Use Potential And Suitability Of Ecosystems In Antakya For Reforestation, Recreation, Arable Farming And Residence, Şeref Kiliç, Suat Şenol, Fati̇h Evrendi̇lek
Turkish Journal of Agriculture and Forestry
It is essential that land use decisions made by local administrations be compatible with sustainable use and management principles of natural resources. In this study, we evaluated the use potential and suitability of 27 land mapping units of 4,891 ha in Antakya for three different land use types: (1) recreation- reforestation, (2) residence and (3) arable farming. For this purpose, land suitability evaluation was carried out using soil and land data, the ŞENOL land evaluation system, and a PC compatible ILSEN software package. The study showed that a total of 478 ha of land had the potential for residential use …
The Reaction Of Crotonic Anhydride With Scots And Corsican Pine: Investigation Of Kinetic Profiles And Determination Of Activation Energies, Ni̇lgül Özmen, Ni̇hat Sami̇ Çeti̇n
The Reaction Of Crotonic Anhydride With Scots And Corsican Pine: Investigation Of Kinetic Profiles And Determination Of Activation Energies, Ni̇lgül Özmen, Ni̇hat Sami̇ Çeti̇n
Turkish Journal of Agriculture and Forestry
The kinetics of the reaction of crotonic anhydride with Scots pine (Pinus sylvestris) and Corsican pine (Pinus nigra) using pyridine as catalyst/solvent was investigated and activation energies for the initial reaction determined. Activation energies were calculated from the Arrhenius equation using rate data obtained from time-course experiments repeated at several temperatures. In one method, reaction constants (k) were determined experimentally, while in the other method initial rates were extrapolated at time zero. With the rate constant method, activation energy values for Scots and Corsican pine were calculated as 39.0 (±5.8) and 30.3 (±6.8) kJ mol^{-1}, respectively. The method of initial …
Estimation Of The Effect Of Soil Salinity On Crop Yield Using Remote Sensing And Geographic Information System, Mehmet Ali̇ Çullu
Estimation Of The Effect Of Soil Salinity On Crop Yield Using Remote Sensing And Geographic Information System, Mehmet Ali̇ Çullu
Turkish Journal of Agriculture and Forestry
This study was conducted to estimate the effect of salinity on crop yield by employing a geographical information system (GIS) and remote sensing technologies. The saline soils of Arıcan village, located in the southeastern part of Harran Plain, were studied. Surface soil samples representing each soil series in the study area were collected and analyzed to generate an electrical conductivity (EC) map of the study area soils. Using ground truth information, satellite images were classified and land use classes were determined in the study area. The EC map, land use map, soil map and parcel map were combined and analyzed …
Effects Of Plant Density And Number Of Shoots On Yield And Fruit Characteristics Of Peppers Grown In Glasshouses, H. Yildiz Daşgan, Kazim Abak
Effects Of Plant Density And Number Of Shoots On Yield And Fruit Characteristics Of Peppers Grown In Glasshouses, H. Yildiz Daşgan, Kazim Abak
Turkish Journal of Agriculture and Forestry
Plant density and pruning systems play a key role in the effective use of the area inside the greenhouse. Pepper (Capsicum annuum L.) cultivars, Amazon-long green and Balo bell-shape type, were grown in the winter cultivation period in a glasshouse. A constant space of 80 cm between rows with different within-row spacings (45 cm, 30 cm and 15 cm) and shoot numbers (between one and four shoots per plant) were applied to optimize plant density and number of shoots. Wider within-row spacing and higher shoot numbers per plant increased the number of leaves. However, the individual leaf blade area was …
Effect Of Indole-3-Butyric Acid And Different Strains Of Agrobacterium Rubi On Adventive Root Formation From Softwood And Semi-Hardwood Wild Sour Cherry Cuttings, Ahmet Eşi̇tken, Sezai̇ Erci̇şli̇, İsmai̇l Şevi̇k, Fi̇kretti̇n Şahi̇n
Effect Of Indole-3-Butyric Acid And Different Strains Of Agrobacterium Rubi On Adventive Root Formation From Softwood And Semi-Hardwood Wild Sour Cherry Cuttings, Ahmet Eşi̇tken, Sezai̇ Erci̇şli̇, İsmai̇l Şevi̇k, Fi̇kretti̇n Şahi̇n
Turkish Journal of Agriculture and Forestry
This study was conducted to evaluate the effects of a range of Indole-3-butyric acid (IBA) concentrations (250, 500 and 750 mg 1^{-1}) alone and in combination with three strains of Agrobacterium rubi (A1, A16 and A18) on the rooting capacity of wild sour cherry (Prunus cerasus L.) softwood and semi-hardwood cuttings. The bacterial strains used in the present study were isolated from the foliage of pome fruits (from apple and pear orchards) growing in the eastern Anatolia region of Turkey. No rooting was observed on the cuttings of wild sour cherry with control treatment (no IBA or bacterial treatment) in …
Population Densities Of Liriomyza Huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae) In Insecticide-Treated And Non-Treated Cucumber Producing Greenhouses In The İzmir Region, Hasan Sungur Ci̇velek, Zeynep Yoldaş
Population Densities Of Liriomyza Huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae) In Insecticide-Treated And Non-Treated Cucumber Producing Greenhouses In The İzmir Region, Hasan Sungur Ci̇velek, Zeynep Yoldaş
Turkish Journal of Agriculture and Forestry
Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae) is an important pest in cucumber greenhouses in Çamönü (Menderes, İzmir), Turkey. This study was carried out during the spring and autumn production seasons in 1999 and 2000 in two greenhouses belonging to a local farmer, each of them 1000 m^2 in size. The infested leaves from insecticide-treated and non-treated greenhouses were sampled weekly. The leaves were sampled weekly from both greenhouses and kept in our laboratory under observation to compare the number of emerging leafminer adults. Despite the applications, during three of the four seasons examined, pest density in the insecticide-treated greenhouse was not …
Evaporative Cooling Efficiency Of A Fogging System For Greenhouses, Hasan Hüseyi̇n Öztürk
Evaporative Cooling Efficiency Of A Fogging System For Greenhouses, Hasan Hüseyi̇n Öztürk
Turkish Journal of Agriculture and Forestry
The objective of this study was to investigate the efficiency of fogging system (FS) for greenhouses. The experiments were carried out in a multi-span plastic greenhouse (PG), 105.6 m wide and 205 m long, made of 11 spans. The FS consists of a water softener and filters to prevent nozzle clogging, a water reservoir, pumps and a pressure regulator, and fog generating nozzles (FGN). The required pressure for FGN was 4.5 atm. Three nozzle lines with 82 FGN were installed in each span of the PG. At each nozzle line, 82 FGN were uniformly located at 2.5 m nozzle spacing. …
Assessment Of Day-Neutrality Scoring Methods In Strawberry Families Grown In Greenhouse And Field Environments, Sedat Serçe, James F. Hancock
Assessment Of Day-Neutrality Scoring Methods In Strawberry Families Grown In Greenhouse And Field Environments, Sedat Serçe, James F. Hancock
Turkish Journal of Agriculture and Forestry
A strawberry plant is considered day-neutral if it can form flower buds under both long and short day conditions; however, researchers use different methods to score day-neutrality. We studied the relationship among several different evaluation methods for day-neutrality and analyzed the possibility that greenhouse screens can be used to predict field flowering performance. The evaluation methods included: 1) flowering within 100 days from germination in a greenhouse; 2) flowering during the first summer after planting in the field; 3) flowering under both short and long days in the second year in a greenhouse; and 4) flowering under both short and …
Determination Of The Agronomic Performances Of Some Oilseed Sunflower (Helianthus Annuus L.) Hybrids Grown Under Erzurum Ecological Conditions, Hakan Özer, Erdoğan Öztürk, Taşkin Polat
Determination Of The Agronomic Performances Of Some Oilseed Sunflower (Helianthus Annuus L.) Hybrids Grown Under Erzurum Ecological Conditions, Hakan Özer, Erdoğan Öztürk, Taşkin Polat
Turkish Journal of Agriculture and Forestry
In eastern Anatolia, the sunflower (Helianthus annuus L.) has been grown as a confectionary crop for a long time, but oilseed sunflower types have more recently been grown commercially. No information on the performance of oilseed sunflower hybrids for this region is, however, available. Therefore, during the 1998 and 2001 growing seasons, a field experiment was conducted to evaluate the agronomic performances and genotypic differences of some sunflower hybrids under Erzurum conditions. In this study 20 sunflower genotypes were used. The 2-year results showed that the genotypes differed significantly in all the characteristics investigated, except for kernel percentage. Similarly, the …
Heterosis And Combining Ability For Yield Components And Fiber Quality Parameters In A Half Diallel Cotton (G. Hirsutum L.) Population^1, Hüseyi̇n Başal, İsmai̇l Turgut
Heterosis And Combining Ability For Yield Components And Fiber Quality Parameters In A Half Diallel Cotton (G. Hirsutum L.) Population^1, Hüseyi̇n Başal, İsmai̇l Turgut
Turkish Journal of Agriculture and Forestry
Combining ability and heterosis were determined in a population obtained from the half diallel crossing of 6 different cotton genotypes for yield components and fiber quality parameters. For breeding purposes, to improve the investigated characters some suitable parents were selected for different characters: DPL 5690 for number of bolls per plant, Acala SJ-5 for boll weight and fiber length; Nazilli-84 and Carmen for seed cotton yield and lint percentage; Tamcot CAMD-E for earliness and fiber fineness; and PD 6168 for fiber strength. When the crosses were evaluated for the investigated characters Tamcot CAMD-E x Carmen, Nazilli-84 x PD 6168, DPL …