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Effectiveness Of Bumblebee Pollination In Anti-Frost Heated Tomato Greenhouses In The Mediterranean Basin*, H. Yildiz Daşgan, A. Oğuz Özdoğan, Osman Kaftanoğlu, Kazim Abak Jan 2004

Effectiveness Of Bumblebee Pollination In Anti-Frost Heated Tomato Greenhouses In The Mediterranean Basin*, H. Yildiz Daşgan, A. Oğuz Özdoğan, Osman Kaftanoğlu, Kazim Abak

Turkish Journal of Agriculture and Forestry

Turkey has 22,000 ha of greenhouse area, and about 51% of vegetable greenhouses are used for tomato production. In Mediterranean countries generally greenhouses are not regularly heated at optimal levels. Fruity vegetables in winter have a problem of insufficient pollination due to low temperatures and isolated atmosphere. The aim of this study was to investigate the effectiveness of bumblebee (Bombus terrestris) pollination in tomato production in anti-frost heated greenhouses in the Mediterranean basin. Three fruit set applications, namely bumblebee, vibration and growth regulator, were used. Bumblebee pollination was compared to 2 other techniques that are commonly used in tomato greenhouses. …


Determination Of Sowing Dates Of Sweet Corn (Zea Mays L. Saccharata Sturt.) Under Şanlıurfa Conditions, Abdullah Öktem, A. Gülgün Öktem, Yalçin Coşkun Jan 2004

Determination Of Sowing Dates Of Sweet Corn (Zea Mays L. Saccharata Sturt.) Under Şanlıurfa Conditions, Abdullah Öktem, A. Gülgün Öktem, Yalçin Coşkun

Turkish Journal of Agriculture and Forestry

This study was conducted to determine optimum sowing dates for sweet corn in the Southeastern Anatolia region. The research was carried out at the Agricultural Research Station of Harran University in Şanlıurfa during 2000 and 2001. Sowing dates were April 25, May 10, May 25, June 10, June 25, July 10, July 25 and August 10. Based on the sowing dates, fresh ear yield, duration of tasseling, ear diameter, kernel numbers per ear, single fresh ear weight and husk ratio parameters were statistically significant (**P < 0.01) in both years. The highest fresh ear yields were 177.51 and 172.30 kg ha^{-1} for the 25 July sowing date in 2000 and 2001, respectively. The lowest fresh ear yields were 18.24 and 15.53 kg ha^{-1} for the April 25 sowing date in 2000 and 2001, respectively. Fresh ear yield decreased with early sowing dates (from April 25 to June 25) in both years. The results indicate that optimal sowing dates for sweet corn could be from June 25 to July 25 in Şanlıurfa and similar Southeastern Anatolia regions.


Field-Measured Furrow Infiltration Functions, Abolfazl Nasseri, Mohammad Reza Neyshabori, Ahmad Fakheri Fard, Mohammad Mogaddam, Amir Hossein Nazemi Jan 2004

Field-Measured Furrow Infiltration Functions, Abolfazl Nasseri, Mohammad Reza Neyshabori, Ahmad Fakheri Fard, Mohammad Mogaddam, Amir Hossein Nazemi

Turkish Journal of Agriculture and Forestry

Furrow infiltration varies with different variables and is a complex process for modeling infiltration over the field. This research was conducted to develop empirical relationships between field-wide furrow infiltration and independent variables such as the opportunity time, initial soil water content, flow depth, flow section area, wetted perimeter and wet bulk density. Furrow infiltration was measured by blocked furrow infiltrometers at 48 infiltration sites over a 70 x 130 m field plot. Simple and partial correlations between cumulative infiltration and independent variables were evaluated. The effects of wet bulk density and flow depth on cumulative infiltration were insignificant when the …


Development Of A Mathematical Model Using Dimensional Analysis For Predicting The Friction Losses In Drip Irrigation Laterals With Cylindrical Type In-Line Emitters, Vedat Demi̇r, Hüseyi̇n Yürdem, Adnan Deği̇rmenci̇oğlu Jan 2004

Development Of A Mathematical Model Using Dimensional Analysis For Predicting The Friction Losses In Drip Irrigation Laterals With Cylindrical Type In-Line Emitters, Vedat Demi̇r, Hüseyi̇n Yürdem, Adnan Deği̇rmenci̇oğlu

Turkish Journal of Agriculture and Forestry

This paper presents a prediction model developed using dimensional analysis for friction losses in drip irrigation laterals. Drip irrigation laterals with cylindrical type in-line emitters placed at different spacings ranging from 0.2 to 1 m were considered. The parameters affecting the variation in friction losses in laterals were defined as dimensionless terms using Buckingham's pi theorem. In order to develop a model, experimental friction loss data from 14 different drip irrigation pipes, and some domestic and some imported ones with the above-mentioned spacings were used. The model developed in this study accounted for 98.7% of the variation in the data. …


Some Technological Properties Of Laminated Veneer Lumber Manufactured From Pine (Pinus Sylvestris L.) Veneers With Melamine Added - Uf Resins, Semra Çolak, İsmai̇l Aydin, Cenk Demi̇rkir, Gürsel Çolakoğlu Jan 2004

Some Technological Properties Of Laminated Veneer Lumber Manufactured From Pine (Pinus Sylvestris L.) Veneers With Melamine Added - Uf Resins, Semra Çolak, İsmai̇l Aydin, Cenk Demi̇rkir, Gürsel Çolakoğlu

Turkish Journal of Agriculture and Forestry

The objectives of this study were to compare the modulus of elasticity, bending strength, shear strength and formaldehyde emissions of laminated veneer lumber (LVL) bonded with melamine added urea formaldehyde resin (UF+M) and produced with other resins such as urea-formaldehyde (UF), melamine-urea-formaldehyde (MUF) and phenol formaldehyde (PF), and to determine the effects of 2 different climate conditions on the bending strength and modulus of elasticity of pine LVL panels. After the panel production, the test specimens were divided into 2 groups for all tests. The first group of test specimens were conditioned at 20 °C and 45% R.H., while the …


An Analysis Of The Impacts Of Production Quotas And Ura Provisions On Turkey's Sugar Sector, Fahri̇ Yavuz Jan 2004

An Analysis Of The Impacts Of Production Quotas And Ura Provisions On Turkey's Sugar Sector, Fahri̇ Yavuz

Turkish Journal of Agriculture and Forestry

Sugar beet is an important crop in terms of production value and represents 2.5% of the total value of crop production. Its production has been regulated and supported by the government. To adapt Turkey's sugar policies for potential admission to the EU, a sugar production quota policy was implemented in 1999 in addition to existing policies, mainly including price support and input subsidies. At the same time, the tariff imposed on imported sugar was reduced by 10% in order to comply with Uruguay Round Agreement (URA) provisions. The objective here is to analyze the impacts of these policy changes on …


Crack Propagations And Fatigue Characteristics Of Some Handmade Papers*, Ari̇f Karademi̇r, Sami̇ İmamoğlu, Ni̇hat Sami̇ Çeti̇n Jan 2004

Crack Propagations And Fatigue Characteristics Of Some Handmade Papers*, Ari̇f Karademi̇r, Sami̇ İmamoğlu, Ni̇hat Sami̇ Çeti̇n

Turkish Journal of Agriculture and Forestry

In this work, a number of handsheets made from unbeaten and unbleached kraft, refiner mechanical and cotton linter pulps and crack propagations on paper samples under monotonic loading, were analyzed and possible links with the properties of fibrous networks were investigated. Crack initiation and propagation on the tested paper strips were also investigated under a scanning electron microscope to determine visually the state of the paper matrix under applied loads. Furthermore, paper samples were subjected to a series of mechanical tests, such as tearing resistance, folding endurance and tensile strength. The primary goal of this study concentrated on determining the …


Estimation Of Risk Efficient Farm Structures Along The Kızılırmak River In North Central Anatolia: An Application Of Minimization Of The Absolute Deviation, Vedat Ceyhan, H. Avni̇ Ci̇nemre Jan 2004

Estimation Of Risk Efficient Farm Structures Along The Kızılırmak River In North Central Anatolia: An Application Of Minimization Of The Absolute Deviation, Vedat Ceyhan, H. Avni̇ Ci̇nemre

Turkish Journal of Agriculture and Forestry

A risk-programming model was developed to evaluate the tradeoffs between risk and expected returns for farms along the Kızılırmak River in North Central Anatolia. Risk efficient farm structures were derived for representative farms by using minimization of the absolute deviation procedures, which permit the estimation of a farm's risk-return frontier. Research results reveal that farm plans are sensitive to the risk criteria in the research area. Rice and maize are the most high-risk activities, followed by lettuce and soybean. Wheat, sugar beet and dairy activities have a more stabilizing effect on farm income compared to others. Medium size and large …


Archaeobotanical And Dendroarchaeological Studies In Ilgarini Cave (Pınarbaşı, Kastamonu, Turkey), Ünal Akkemi̇k, Burhan Aytuğ, Sercay Güzel Jan 2004

Archaeobotanical And Dendroarchaeological Studies In Ilgarini Cave (Pınarbaşı, Kastamonu, Turkey), Ünal Akkemi̇k, Burhan Aytuğ, Sercay Güzel

Turkish Journal of Agriculture and Forestry

With its historical remains and beautiful travertine formations, Ilgarini cave is important in terms of archaeobotany and natural sciences. In the left part of the cave there are 2 temples and 11 graves. These graves had 3 floors, and wooden materials were used between them. The purpose of the study was to identify the wooden materials taken from the graves in Ilgarini cave and to determine the lifetime of the people who lived in the cave by dating them dendrochronologically. In wood identification analysis, many thin sections were cut, and they were compared with reference wood sections. In dendroarchaeological analysis, …


Effects Of Barley As A Companion Crop On The Hay Yield And Plant Density Of Red Clover And The Botanical Composition Of Hay, Mustafa Tan, Yunus Seri̇n, H. İbrahi̇m Erkovan Jan 2004

Effects Of Barley As A Companion Crop On The Hay Yield And Plant Density Of Red Clover And The Botanical Composition Of Hay, Mustafa Tan, Yunus Seri̇n, H. İbrahi̇m Erkovan

Turkish Journal of Agriculture and Forestry

Forage legumes are frequently established with a companion crop such as a cereal crop for controlling weed invasion and high hay production. This study was conducted under irrigated conditions in order to determine the effects of the seeding rate and harvest stage of barley as a companion crop on the hay yield and plant density of red clover and the botanical composition of hay. Red clover was established with barley sown at 0, 60, 120 and 180 kg ha^{-1} and cut at the milk-dough and hard-dough stages. The highest total hay yield (6000 kg ha^{-1}) was measured at a 180 …


Effect Of Different Control Methods On Weeds, Yield Components And Nodulation In The Spring Lentil, Işik Tepe, Murat Erman, Ayşe Yazlik, Remzi̇ Levent, Kuddusi̇ İpek Jan 2004

Effect Of Different Control Methods On Weeds, Yield Components And Nodulation In The Spring Lentil, Işik Tepe, Murat Erman, Ayşe Yazlik, Remzi̇ Levent, Kuddusi̇ İpek

Turkish Journal of Agriculture and Forestry

This study was conducted on the lentil cultivar Malazgirt 89 during 1999 and 2000 to determine the most appropriate method for controlling weeds. In the experiments, hand hoeing, trifluralin, imazethapyr, linuron, prometryn, phenmedipham + desmediphame, trifluralin + hand hoeing and linuron + hand hoeing which should be used as an alternative to hand weeding, were tested. The effects of herbicides on nodulation in lentils were also investigated. Centaurea depressa in the first year, and Ranunculus arvensis and Acroptilon repens in the second year were the dominant weed species encountered in the plots. A combination of linuron + hand hoeing, linuron …


Harvest Date Influences Superficial Scald Development In Granny Smith Apples During Long Term Storage, Mustafa Erkan, Mustafa Pekmezci̇ Jan 2004

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 …


Destructive Effects Of Classical Viscosimeters On The Microstructure Of Yoghurt Gel, Barbaros H. Özer Jan 2004

Destructive Effects Of Classical Viscosimeters On The Microstructure Of Yoghurt Gel, Barbaros H. Özer

Turkish Journal of Agriculture and Forestry

The effects of empirical viscosity measuring techniques that are commonly used in the determination of the viscosity of weak viscoelastic gels such as yoghurt on the microstructure of yoghurt were investigated by scanning electron microscopy (SEM). In the measurement of viscosity, Brookfield and Haake viscosimeters were employed at 2 different measuring periods (15 and 30 s). The results obtained indicated that the increase in the measuring period (15 s versus 30 s) stimulated the further destruction of the casein gel network. Additionally, the Brookfield viscosimeter was more destructive than the Haake viscosimeter. In general, lower viscosity values were in good …


Evaluation Of The Antioxidant And Antimicrobial Activities Of Clary Sage (Salvia Sclarea L.), İlhami̇ Gülçi̇n, Meti̇n T. Uğuz, Müni̇r Oktay, Şükrü Beydemi̇r, Ömer İrfan Küfrevi̇oğlu Jan 2004

Evaluation Of The Antioxidant And Antimicrobial Activities Of Clary Sage (Salvia Sclarea L.), İlhami̇ Gülçi̇n, Meti̇n T. Uğuz, Müni̇r Oktay, Şükrü Beydemi̇r, Ömer İrfan Küfrevi̇oğlu

Turkish Journal of Agriculture and Forestry

The present work evaluates the antioxidant and antimicrobial activity of clary sage (CS) Salvia sclarea L. Antimicrobial, total antioxidant, DPPH radical scavenging, superoxide anion radical scavenging, hydrogen peroxide scavenging and metal chelating activities, reducing power, and total contents of phenolic compounds of dried herb samples extracted with chloroform and acetone were studied. The chloroform extract had stronger total antioxidant activity than the acetone extract and exhibited 93 and 68% inhibition of linoleic acid peroxidation, respectively. a-Tocopherol, quercetin, butylated hydroxyanisole and butylated hydroxytoluene were used as standard antioxidants. Antimicrobial activities of both CS extracts were examined by means of disk-diffusion methods …


Effects Of Controlled Atmosphere Storage On Scald Development And Postharvest Physiology Of Granny Smith Apples, Mustafa Erkan, Mustafa Pekmezci̇, Hami̇de Gübbük, Işilay Karaşahi̇n Jan 2004

Effects Of Controlled Atmosphere Storage On Scald Development And Postharvest Physiology Of Granny Smith Apples, Mustafa Erkan, Mustafa Pekmezci̇, Hami̇de Gübbük, Işilay Karaşahi̇n

Turkish Journal of Agriculture and Forestry

The effects of different O2 and CO_2 concentrations on the scald development and postharvest physiology of Granny Smith apples (Malus domestica Borkh.) were investigated. Apples were harvested at optimal harvest time and stored in 1% CO_2/2% O_2, 2% CO_2/2% O_2, 3% CO_2/2% O_2 and 0% CO_2/21% O_2 (control) at 0 °C and 90-92% relative humidity for 9 months. At certain intervals, samples were collected from each storage condition for physical and chemical analysis (e.g. weight loss, flesh firmness, amount of titratable acid, total soluble solids, skin color, scald development, respiration rate and decayed fruit). Respiration rates of the apples were …


In Vitro Studies On Some Natural Beverages As Botanical Pesticides Against Erwinia Amylovora And Curtobacterium Flaccumfaciensis Subsp. Poinsettiae, Mehmet Nuri̇ Nas Jan 2004

In Vitro Studies On Some Natural Beverages As Botanical Pesticides Against Erwinia Amylovora And Curtobacterium Flaccumfaciensis Subsp. Poinsettiae, Mehmet Nuri̇ Nas

Turkish Journal of Agriculture and Forestry

Several tannin-rich beverages were tested for their antibacterial activity against 2 important phytopathogenic bacteria, Erwinia amylovora and Curtobacterium flacumfaciensis subsp. poinsettiae. Black tea (9.5, 19 and 38 g l^{-1}), green tea (9.5, 19 and 38 g l^{-1}) and tannic acid (0.2, 0.4 and 0.8 g l^{-1}) inhibited the growth of E. amylovora and C. f. subsp. poinsettiae. Coffee (8.75, 17.5 and 35 g l^{-1}) and cocoa (8.75, 17.5 and 35 g l^{-1}) did not display any inhibitory effect on the growth of bacterial cultures. The numbers of colony forming units (CFUs) of E. amylovora in the presence of black tea, …


Effects Of Seeding Rates On Yield And Yield Components Of Hungarian Vetch (Vicia Pannonica Crantz.), Ayşen Uzun, Uğur Bi̇lgi̇li̇, Mehmet Si̇nci̇k, Esvet Açikgöz Jan 2004

Effects Of Seeding Rates On Yield And Yield Components Of Hungarian Vetch (Vicia Pannonica Crantz.), Ayşen Uzun, Uğur Bi̇lgi̇li̇, Mehmet Si̇nci̇k, Esvet Açikgöz

Turkish Journal of Agriculture and Forestry

The effects of 4 seeding rates (20, 40, 80 and 160 kg ha^{-1}) on dry matter yield, seed yield and yield components were evaluated in 4 accessions (L46, L79, L457, Local) of Hungarian vetch (Vicia pannonica Crantz.) under fall seeding conditions during the 2000-2001 and 2001-2002 crop years. Dry matter yield, plant height, number of pods per plant, number of seeds per plant, 1000- seed weight, biomass yield, seed yield and harvest index were measured. Based on the 2-year results, no significant differences were found among Hungarian vetch accessions in any of the measured characteristics with the exception of 1000- …


The Effects Of Urban Green Spaces On House Prices In The Upper Northwest Urban Development Area Of Adana (Turkey), M. Faruk Altunkasa, Cengi̇z Uslu Jan 2004

The Effects Of Urban Green Spaces On House Prices In The Upper Northwest Urban Development Area Of Adana (Turkey), M. Faruk Altunkasa, Cengi̇z Uslu

Turkish Journal of Agriculture and Forestry

Green spaces have very important functions in the creation of a sustainable city. However, in cities, which grow in terms of their population and physical environment, the primary aim of city planning is to meet the housing deficit. For this reason, areas having natural characteristics within an urban area are destroyed and existing green spaces are turned into housing areas. The most important reason why green spaces are not prioritized in city planning is that there is no market representing the green spaces. The market value of green spaces is hard to quantify. The higher price paid by customers for …


Modeling Approaches To Salt Management Problems In Irrigated Agriculture: A Review, Ataç Tuli̇, William Austin Jury Jan 2004

Modeling Approaches To Salt Management Problems In Irrigated Agriculture: A Review, Ataç Tuli̇, William Austin Jury

Turkish Journal of Agriculture and Forestry

Irrigation projects have been developed throughout human history to increase food production, but they frequently contribute to salinization and drainage problems as well. Examples where salinization and drainage water disposal due to agricultural activity are a critical problem can be found in irrigated areas in different parts of the world. To find possible solutions to irrigation and drainage related problems, government agencies, scientists, and soil and water resources managers recommend a broad array of management alternatives for conducting investigations. The concept of management alternatives of salinization and drainage problems can be evaluated by field experiments and/or by simulating conditions with …


Determination Of Hydraulic Performance Of Trickle Irrigation Emitters Used In Irrigation Systems In The Harran Plain, Hali̇l Kirnak, Ergün Doğan, Siddik Demi̇r, Sabri̇ Yalçin Jan 2004

Determination Of Hydraulic Performance Of Trickle Irrigation Emitters Used In Irrigation Systems In The Harran Plain, Hali̇l Kirnak, Ergün Doğan, Siddik Demi̇r, Sabri̇ Yalçin

Turkish Journal of Agriculture and Forestry

Trickle irrigation systems' efficiency depends on system uniformity, which is determined by water discharge uniformity from emitters. It is impossible to produce 2 identical emitters due to manufacturing variations. The manufacturer's coefficient of variance is used as a measure of discharge variations of emitters. In this study, manufacturers' reported discharge rates and coefficients of manufacturing variation (CVm) values were compared with test results for various types of in-line emitters manufactured by 4 different companies in Turkey. A total of 9 drip irrigation lines, comprising 7 non-compensating and 2 compensating emitters, were tested at 50, 100, 150, 200 and 250 kPa …


Inheritance Of Grain Yield In A Half-Diallel Maize Population, Aydin Ünay, Cahi̇t Konak, Hüseyi̇n Başal Jan 2004

Inheritance Of Grain Yield In A Half-Diallel Maize Population, Aydin Ünay, Cahi̇t Konak, Hüseyi̇n Başal

Turkish Journal of Agriculture and Forestry

Inheritance of grain yield, heterosis and combining ability were investigated in maize populations obtained from half-diallel crossing among 9 inbred parental lines. General and specific combining ability effects were significantly different among parental lines. The grain yield was under the dominance gene effect. The parents W 552 and DNB were considered suitable according to their yield capacities and general combining ability effects. The midparent heterosis values ranged from 46.10% (H.96 x DNB) to 573.12% (ALKD 222 x A 632) whereas the useful heterosis values varied between -46.47% (A 619 x A 632) and 10.78% (N 7A x ALKD 90-1), and …


The Competitive Ability Of Avena Spp. And Alopecurus Myosuroides Huds. Influenced By Different Wheat (Triticum Aestivum) Cultivars, Hüsrev Mennan, Doğan Işik Jan 2004

The Competitive Ability Of Avena Spp. And Alopecurus Myosuroides Huds. Influenced By Different Wheat (Triticum Aestivum) Cultivars, Hüsrev Mennan, Doğan Işik

Turkish Journal of Agriculture and Forestry

Field experiments were conducted at Havza and Gelemen to evaluate the effect of different densities of Avena spp. and Alopecurus myosuroides Huds. on wheat cultivars Bezostaja and Kate-A-I. As expected the semi-dwarf cultivar Bezostaja was shorter than Kate-A-I in all weed densities, indicating that plant height was not correlated with competitiveness under the experimental conditions. The mean yields of Bezostaja and Kate-A-I in the weed-free plots in 2000-2001were 3420 kg ha^{-1} and 3360 kg ha^{-1}, respectively. Both species caused decreases in wheat yield with increasing density. While 20 Avena spp. per square reduced the yield by 13.3% in Bezostaja, yield …


Effect Of Some Factors On The Strength Of Furniture Corner Joints Constructed With Wood Biscuits*, Ali̇ Naci̇ Tankut, Nurgül Tankut Jan 2004

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 Jan 2004

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 Jan 2004

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 Jan 2004

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 …


In Vitro Propagation Of Some New Banana Types (Musa Spp.), Hami̇de Gübbük, Mustafa Pekmezci̇ Jan 2004

In Vitro Propagation Of Some New Banana Types (Musa Spp.), Hami̇de Gübbük, Mustafa Pekmezci̇

Turkish Journal of Agriculture and Forestry

Three newly selected superior banana types were used to study the effects of different cytokinin and auxins on shoot multiplication and rooting. Benzylaminopurine [(BAP) (5, 10, 20 and 30 µM)] and thidiazuron [(TDZ) (0.4, 1, 2 and 3 µM)] were tested alone and with 1 µM indoleacetic acid (IAA) for the propagation stage. We compared basal Murashige and Skoog (MS) medium, active charcoal (5 g l^{-1}), indole-3-butyric acid (IBA) and naphthaleneacetic acid (NAA) for rooting. Shoot proliferation and elongation were significantly greater with TDZ than with BAP all 3 types. Furthermore, each cytokinin with IAA increased shoot proliferation and elongation …


Comparison Of Fresh Pod Yield And Pod Related Characteristics In Pea (Pisum Sativum L.) Cultivars Sown In Autumn And Spring Under Samsun Ecological Conditions, Erkut Pekşen, Aysun Pekşen, Hati̇ce Bozoğlu, Ali̇ Gülümser Jan 2004

Comparison Of Fresh Pod Yield And Pod Related Characteristics In Pea (Pisum Sativum L.) Cultivars Sown In Autumn And Spring Under Samsun Ecological Conditions, Erkut Pekşen, Aysun Pekşen, Hati̇ce Bozoğlu, Ali̇ Gülümser

Turkish Journal of Agriculture and Forestry

: In this study, 15 pea (Pisum sativum L.) cultivars sown in autumn and spring were investigated for their fresh pod yield and pod characteristics under Samsun ecological conditions during the 1999-2000 and 2000-2001 growing seasons. The results of the study for fresh pod yield from the combined 2 years showed that there was a statistically significant difference among the cultivars. The highest fresh pod yield was obtained from Vilmoren (17,840 kg ha^{-1}), followed by Lancet (14,290 kg ha^{-1}), Agromar AG 7306 (13,880 kg ha^{-1}), Jumbo (13,830 kg ha^{-1}), Sprinter (13,690 kg ha^{-1}), Sugar Bon (12,370 kg ha^{-1}), Bolero (12,800 …


Host-Specific Toxin Production By The Tomato Target Leaf Spot Pathogen Corynespora Cassiicola, Şener Kurt Jan 2004

Host-Specific Toxin Production By The Tomato Target Leaf Spot Pathogen Corynespora Cassiicola, Şener Kurt

Turkish Journal of Agriculture and Forestry

The culture filtrate (CF) of Corynespora cassiicola, the causal agent of target leaf spot of tomato, produced visible small, pinpoint, water-soaked lesions on the lower surface of wounded, detached leaves after incubation for 48 h. The extraction, isolation and purification of C. cassiicola tomato (CCT) toxin was achieved by anion exchange and gel filtration chromatography. Treatments of the CF with Diaion HP-20 resin and Cosmosil C18-OPN gel were found to be highly effective. The toxin purified partially by cosmosil gel filtration was highly active against the tomato cultivar Momotaro used in the bioassay test, and the fraction eluted with 50% …


Effects Of Inoculation With Rhizobium On Forage Yield And Yield Components Of Common Vetch (Vicia Sativa L.), Sebahatti̇n Albayrak, Cafer Sirri Sevi̇may, Özgür Töngel Jan 2004

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 …