2005, Volume: 11, Number: 3
Contents
MENDEŞ, M. How Many Samples are Enough When Data are Unbalanced ? Abstract Full Text (PDF)
AKTÜRK, D., F. SAVRAN, H. HAKYEMEZ, G. DAŞ ve T. SAVAŞ. Socio-economic Analysis of Animal Breeding Enterprises under Extensive Conditions in Gökçeada Abstract Full Text (PDF)
ELİBÜYÜK, İ. Ö. Investigations on Sharka Disease on Peach Trees in Ankara Abstract Full Text (PDF)
BALIÇ, N. Studies on Possibilities Usage of Forecasting Models in Control of Grapevine Powdery Mildew in Central Anatolia Region Abstract Full Text (PDF)
YURTLU, Y. B. ve D. ERDOĞAN. Effect of Storage Time on Some Mechanical Properties of Cucumber Cultivars Abstract Full Text (PDF)
AYDIN, N., H. O. BAYRAMOĞLU Z. MUT ve H. ÖZCAN. Determination of Yield and Quality Characters of Bread Wheat (Triticum aestivum L.) Cultivars and Lines under Black Sea Region Conditions of Turkey Abstract Full Text (PDF)
ALBAYRAK, S. ve C. S. SEVİMAY. Effects of Inoculation with Rhizobium on Dry Matter and Seed Yields of Common Vetch (Vicia sativa L.) under Ankara and Samsun Conditions and Stability Analysis Abstract Full Text (PDF)
EROĞLU, E., G. AKINCI KESİM ve H. MÜDERRİSOĞLU Determination of Plants in Open and Green Areas in Düzce and Evaluation of These Plants According to Some Planting Design PrinciplesAbstract Full Text (PDF)
MÜJDECİ, M., A. SARIYEV ve V. POLAT Mathematical Modelling of Growth Periods of Wheat (Triticum aestivum L.) and Leaf Area Index Abstract Full Text (PDF)

AYGÜN, A. ve B. ŞAN. The Late Spring Hardiness of Some Apple Varieties at Various Stages of Flower Buds Abstract Full Text (PDF)

ODABAŞ, M. S. ve A. GÜLÜMSER. Effect of Different Light Intensities on Some Plant Characteristics and Yield of Faba Bean (Vicia faba L.) Abstract Full Text (PDF)
TÜRK, M. The Effects of Different Seeding Densities on the High and Crude Protein Yields of Sainfoin (Onobrychis sativa L.) Abstract Full Text (PDF)
PARLAK ÖZASLAN A. ve C. S. SEVİMAY. Effect of Seeding After Barley and Wheat Harvest on Yield Components of Forage Turnip (Brassica rapa L.) Cultivars Abstract Full Text (PDF)
ÜNAL, H. G. ve R. KESKİN. Improvement of a Spacing Drill Pneumatich System in Garlich Planting Abstract Full Text (PDF)
ERİŞEN, S. Plant Regeneration Through Somatic Embryogenesis in Alfalfa (Medicago sativa L.) Abstract Full Text (PDF)
BAYSOYU, D., O. TİRYAKİ ve N. KILINÇER. Fate of 14C-Aldicarb in Parasitized Spodoptera littoralis Boisd. Larvae Abstract Full Text (PDF)
TAŞDAN, K. Technical Conversion Factors and Their Use for Agricultural Products Foreign Trade: Maize Example Abstract
KARADAVUT, U., A. GENÇ, A. TOZLUCA, İ. KINACI, Ş. AKSOYAK, Ç. PALTA ve A. PEKGÖR Comparing The Alternative Regression Methods on Some Yield Traits of Chikpea (Cicer arietinum L.) Abstract Full Text (PDF)
GERAKAKİS ÇETİNTAŞ, A. ve M. T. ÖZKAYA. Effects of Cutting Size, Rooting Media and Planting Time on Rooting of Domat and Ayvalik Olive (Olea europaea L.) Cultivars in Shaded Polyethylene Tunnel (Spt) Abstract Full Text (PDF)
ÖZER, G. ve F. ERTUNÇ. Detection of Rhizomania Disease in Sugar Beet Plantations of Amasya Sugar Refinery Abstract Full Text (PDF)
Abstracts
 

2005, 11 (3) 225-228
How Many Samples are Enough When Data are Unbalanced?
(English)

Mehmet MENDEŞ1
1 Çanakkale Onsekiz Mart University Faculty of Agriculture Department of Animal Science -Çanakkale

A crucial component of the design of a study is the number of participants or observations (sample size) required. Taking too many samples will waste time and resources, both in collecting and analyzing the data. On the other hand, taking too small samples can make the whole study meaningless or lead to errors in interpritation. Equal group sizes are preferable. But, this is not always the case in practice. The aim of this study is to clarify some of the key issues regarding sample size and power (80 %) when data are unbalanced. For this aim, a simulation study was conducted. At the end of the 50,000-simulation trial it was seen that there are many different sample size combinations that make it possible to reach around 80% test power. On the other hand, as the numbers of observations were getting more different, we needed more observations to reach around 80 % test power. For instance, the test power we reached for the 16 observations in each group (n=16:16:16), total 48 observations, we can only reach with 72 observations when sample sizes were unequal (n=12, 30, 30) and (n=12: 24: 36). As the variances were getting more heterogenous, the effect of unbalanced data on test power was getting more obvious.

Key Words: Optimum sample size, test power, effect size, unbalanced data







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2005, 11 (3) 229-235
Socio-economic Analysis of Animal Breeding Enterprises under Extensive Conditions in Gökçeada * (Turkish)

Duygu AKTÜRK1, Ferhan SAVRAN1, Hakan HAKYEMEZ2, Gürbüz DAŞ3 and Türker SAVAŞ3
* This research was supported by Scientific Reserarch Project Commision of Çanakkale Onsekiz Mart University
1 Çanakkale Onsekiz Mart Üniversity Faculty of Agriculture Department of Agricultural Economics -Çanakkale
2 Çanakkale Onsekiz Mart Üniversity Faculty of Agriculture Department of Agronomy -Çanakkale
3 Çanakkale Onsekiz Mart Üniversity Faculty of Agriculture Department of Animal Science -Çanakkale

Aim of this research is to analyse the socio-economic conditions of small rumimant farms in Gökceada Turkey. Breeding type is uniqe in Gokceada that sheep and goats are marked by breeders and are abandoned in nature. When breeders need money, sheep and/or goats are collected and sold. For analysis, 49 farms from Gökceada were selected by using random sample. Research data where obtained from questioniars which are made by face to face with managers of the enterprises. According to the results the litracy rate was high, undergraduate degree was 10%. High avarege litracy rate is one of the increasing factor on to be organized. In addition, litracy level is a factor that increases the usage of formal information sources. It has been determined that the performance of farmer organisations is low. Main reason is inadequate management. Also it has been determined that there were problems in marketing of products due to island's geographic conditions. Animal breeding gross value production of enterprises, which is 78.62 % of total, is obtained from small ruminants. Another important observation is that the enterprises obtain 90.26 % of their gross margin from small ruminants. Reasons of intensive breeding of small ruminants in Gokceada were small scaled land per family and breeding in nature with low level cost.

Key Words: Animal husbandry, socio-economic analysis






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2005, 11 (3) 236-243
Investigations on Sharka Disease on Peach Trees in Ankara (Turkish)

İ. Özer ELİBÜYÜK1
Ankara University Faculty of Agriculture Department of Plant Protection- Ankara

Sharka disease caused by Plum pox potyvirus (PPV) is considered to be the most devastating disease of stone fruit trees. This disease has a limited distribution in Turkey, and it is the most widespread viral disease of stone fruits in Ankara province. Until recently, sharka has not been observed on peach trees in Ankara, however, it was observed on apricots and plums. In this study which was carried out in Ankara in 2002-2005, the prevalence of the virus in peach trees, its symptoms, strains and presence in the generative tissues were evaluated. For this purpose, enzyme-linked immunosorbent assay (ELISA) techniques and chip-budding to Prunus persicae GF 305 peach seedlings were used.

Key Words: Sharka, peach, Ankara, strains, ELISA




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2005, 11 (3) 244-250
Studies on Possibilities Usage of Forecasting Models in Control of Grapevine Powdery Mildew in Central Anatolia Region* (Turkish)

Necla BALIÇ1
*Ankara Plant Protection Central Research Institute Project Number TAGEM BS-01/06-09-
1 Ministry of Agriculture and Rural Affairs

This study was conducted on possibilities of utilization from forecasting models for the powdery mildew disease in grapevines. In 2001 - 02, Thomas Gubler and Kast forecasting models was implemented againist powdery mildew on the grape types of Alphonse Lavalle and Kalecik at the vineyards in Kırıkkale and Kalecik districts of Turkey. Forecasting models Thomas-Gubler and Kast were used aganist the powdery mildew disease in grapevines. Chemical treatments suited on Thomas-Gubler model and the Phenology was carried out. It is observed that Thomas-Gubler was effective model for the determination of the first application date in Central Anatolia Region. The number of applications on the early variety was three for the Thomas - Gubler Model and four for the Phenology. It is noted that there is no significant differences between the Thomas-Gubler model and the Phenology with respect to the application numbers at the late variety. Kast model was not appropriate for the districts.

Key Words: Powdery mildew, forecasting, grape, Uncinula necator





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2005, 11 (3) 251-256
Effect of Storage Time on Some Mechanical Properties of Cucumber Cultivars * (Turkish)

Yeşim Benal YURTLU1 and Doğan ERDOĞAN2
* Prepared from Ph.D. Thesis.
1 Directorate of Agricultural Machinary Test Center--Ankara
2 Ankara University Faculty of Agriculture Department of Agricultural Machinery-Ankara

In this study, a compression test-measurement system was developed to determine the effect of storage time on some mechanical properties of cucumber varieties. The compression test-measurement system composes of moving platform, holder, dynamometer, cylindrical die with spherical end, amplifier, PC card, data logger software and computer. 147-F1 and Rawa-F1 cucumber cultivars were used in the tests. To investigate the effects of storage time on the properties of the biological materials, samples were stored in 10 0C and 85-90 % r. h. conditions and tests were conducted at harvest date, 3rd, 6th, 9th and 12th days. The compressive force-deformation characteristics of each vegetable were determined with a view to obtaining information on bioyield point force and deformation for them. Deformation, bioyield point force, modulus of elasticity, deformation energy, deformation volume and deformation susceptibility were determined at the end of the tests. The statistical analyze was made to determine the effects of the cultivars, storage time and their interactions on these properties. Storage time significantly (P<0.01) affected deformation susceptibility but there is no effect of cultivars on it. The modulus of elasticity of both cucumber varieties tended to increase where as deformation susceptibility decrease as the time in cold storage increased.

Key Words: Biological material, cucumber, storage time, mechanical properties, modulus of elasticity







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2005, 11 (3) 257-262
Determination of Yield and Quality Characters of Bread Wheat (Triticum aestivum L.) Cultivars and Lines under Black Sea Region Conditions of Turkey (Turkish)

Nevzat AYDIN1, H. Orhan BAYRAMOĞLU1, Zeki MUT2 and Hasan ÖZCAN1
Black Sea Agricultural Research Institute- Samsun
2Ondokuz Mayıs University Faculty of Agriculture Department of Field Crops- Samsun

Genotype, environment and genotype x environment interaction influence yield and quality traits of bread wheat. The aim of this study was to determine to yield and some quality characters of bread wheat genotypes under the Middle Black Sea Region conditions. Five control cultivars and 20 bread wheat lines were used in the trial. Experiments were conducted in Samsun and Amasya locations during 2003-2004 growing season. The experiment was arranged in accordance with a Completely Randomized Block Design with four replications. Grain yield, plant height, 1000 kernel weight, test weight, protein content and Zeleny sedimentation were evaluated in this research. Grain yield in Samsun was 3450 kg ha-1 while it was determined 4863 kg ha-1 in Amasya. 1000 kernel weight in Samsun ranged from 25.9 to 38.3 g and it varied from 27.8 - 36.9 g in Amasya. Test weight was between 63.8 and 71.8 kg in Samsun while it was 73.1 - 80.2 kg in Amasya. Protein content is 11.2 % and Zeleny sedimentation value was 38.3 ml as the average of two locations.

Key Words: Bread wheat, grain yield, protein content, Zeleny sedimentation






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2005, 11 (3) 263-269
Effects of Inoculation with Rhizobium on Dry Matter and Seed Yields of Common Vetch (Vicia sativa L.) under Ankara and Samsun Conditions and Stability Analysis
(Turkish)

Sebahattin ALBAYRAK1 and Cafer Sırrı SEVİMAY2
1 Black Sea Agricultural Research Institute- Samsun
2 Ankara University Faculty of Agriculture Department of Field Crops-Ankara

The effects of inoculation with Rhizobium on dry matter and seed yield and yield stability of common vetch (Vicia sativa L.) were evaluated under Ankara and Samsun conditions in the 2001-2003 growing seasons. Common vetch cultivars Kubilay, Ürem, Kara Elçi, Uludağ, Emir, Çubuk, Nilüfer and Rhizobium leguminasorum were used as materials. The experiment was established as a split block design with 3 replications in both locations. As average of two years, The highest dry matter yield was obtained from inoculated cultivar Kara Elçi in both Ankara and Samsun conditions. While the highest seed yield was determined from inoculated cultivar Çubuk in Ankara conditions, from inoculated cultivar Emir in Samsun conditions. Results of stability analysis, it was found that Kubilay the most stable cultivar in both dry matter and seed yield.

Key Words: Common vetch, rhizobium inoculation, dry matter yield, seed yield, stability analysis





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2005, 11 (3) 270-277
Determination of Plants in Open and Green Areas in Düzce and Evaluation of These Plants According to Some Planting Design Principles *
(Turkish)

Engin EROĞLU1, Güniz AKINCI KESİM1 and Haldun MÜDERRİSOĞLU1
*Prepared From M.Sc. Thesis.
1 Abant İzzet Baysal Üniv. Faculty of Forestry. Department of Landscape Architecture-Düzce

İn this study, which has been made in the open and green areas of Düzce, the potential of existing plants and the composition values of these plants are determined. During the study, present situation of the plants have been explored and determined. In addition to this, seasonal changes in these plants have been evaluated . The compositions have been evaluated in order to analyze possitive and negative ways both in functional and aesthetical use, what is more, some resolutions to negative ones have been recommended. According to what has been found, some plants having been used in refuges have esthetic values, whilw they are deficient to be used in functional refuge plantation. The purpose of this study is to suggest design characteristics of plants that can be used in planting in Düzce, of which the re-urbanizations studies have been done after earthquake in 1999.

Key Words: Düzce, plant composition, planting design.

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2005, 11 (3) 278-282
Mathematical Modelling of Growth Periods of Wheat (Triticum aestivum L.) and Leaf Area Index
(Turkish)

Metin MÜJDECİ1, Alhan SARIYEV2 and Veysel POLAT3
* Prepared from Ph.D. Thesis.
1 Süleyman Demirel University Faculty of Agriculture Department of Soil Science-Isparta
2 Çukurova University Faculty of Agriculture Department of Soil Science Balcalı-Adana
3 Çukurova Univ. Vocational School of Adana, Adana

Field experiment were carried out to mathematical modelling of growth periods and leaf area index (2000-2002) for three years with Seri-82 wheat cultivar (Triticum aestivum L.) in the University of Çukurova, Faculty of Agriculture Experimental Area. The values of simulation and real experimental values of the growth periods (emergence, tillering, stem elongation, stag leaf, ear emergence, flowering, and physicological ripening,) were compared to and applied statistical evaluations indications; (correlation constants 0.97-1.00, determination constants 0.92-0.99 and relative deviations 8-58 were found. The model results and measurement values for growth periods were correlated well with each other. Similarly, correlation constants, determination constants and relative deviations between the values of simulation and real experimental values of the leaf area index were found 0.97-0.99, 0.92-0.99, 12-58, respectively.

Key Words: Simulation, mathematical modelling, leaf area index






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2005, 11 (3) 283-285
The Late Spring Frost Hardiness of Some Apple Varieties at Various Stages of Flower Buds
(English)

Ahmet AYGÜN1 and Bekir ŞAN2
Black Sea Technical University Faculty of Agriculture Department of Horticulture-Ordu
2 Ankara University Faculty of Agriculture Department of Horticulture-Ankara

In this study, survival rates of pistils of seven apple (Malus x domestica Borkh.) varieties at various stages from tight cluster to full bloom on trees were determined after frost that occurred on the morning at 3:00-8:00 of April 17, 2004 when the temperature dropped to -4 to -6 oC in the orchard. The survival rates of pistils of varieties ranged between 36.7 and 96.5% at tight cluster, 6.2 and 86.0 % at first pink and, 0.2 and 52.0 % at full pink stages after frost injury. 'Starkspur Golden Delicious' (18.0 %), 'Granny Smith' (33.0 %) and 'Canada Reinette' (36.7 %) were the least damaged apple varieties at various flower buds stages from tight cluster to first bloom on trees after frost.

Key Words: Apple, Malus x domestica borkh., late spring frost







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2005, 11 (3) 286-291
Effect of Different Light Intensities on Some Plant Characteristics and Yield of Faba Bean (Vicia faba L.)
(Turkish)

M. Serhat ODABAŞ1 and Ali GÜLÜMSER1
1 Ondokuz Mayıs University Faculty of Agriculture Department of Field Crops-Samsun

This study was carried out to determine the effect of different light intensities (337.35 µmolm-2s-1 and 1128.39 µmolm-2s-1) on characteristics such as plant heigth, stem diameter, number of leaves, the height of the first pod, pod length, pod width, the thickness of pod, number of pod per plant, fresh yield and grain yield. The different light intensities effected all investigated characteristics except seeds per pod and 1000 seed weight. At low and high light intensities respectively plant heigth was 61.2 and 50.1 cm; stem diameter 7.5 and 9.9 mm; the number of leaves 19 and 25, the height of the first pod 22.2 and 18.9 cm, pod length 9 and 15 cm, pod width 1.2 and 2.2 cm, the thickness of pod 1.4 and 1.9 cm; the number of pod in the plant is 3.6 and 6.2; fresh yield is 4030 and 6790 kg/ha; grain yield is 1210 and 2110 kg/ha. According to obtained results, faba bean yield increased depending on light intensity.

Key Words: Faba bean, yield, light intensity.






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2005, 11 (3) 292-298
The Effects of Different Seeding Densities on The Hay and Crude Protein Yields of Sainfoin (Onobrychis sativa L.)
(Turkish)

Mevlüt TÜRK1
Süleyman Demirel University Faculty of Agriculture Department of Field Crops -Isparta

This research was carried out in order to investigate the effects of different row spacings (15, 30, 45, 60 and 75 cm) and seeding rates (4, 8, 12, 16 and 20 kg/da) on the hay and crude protein yields of sainfoin on Agricultural Research and Applied Center of Agriculture Faculty, Uludag University in 2000-2003. The field experiments were established in split block design with four replications. In experiment were determined plant height, hay yield and crude protein yield. According to results of this study, sainfoin should be planted with 15 cm row spacings and 10 kg/da seeding rate for higher hay production in Southern Marmara Region or in regions having the same ecological conditions.

Key Words: Sainfoin, row spacing, seeding rate, hay yield, crude protein yield






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2005, 11 (3) 299-302
Effect of Seeding After Barley and Wheat Harvest on Yield Components of Forage Turnip (Brassica rapa L.) Cultivars
(English)

Altıngül ÖZASLAN PARLAK1 and Cafer S. SEVİMAY1
1Ankara Univ. Faculty of Agriculture,Department of Field Crops-Ankara

This research was carried out at the experimental field of Ankara University, Faculty of Agriculture, and Department of Field Crops in 2003 - 2004. The aim of the study was to determine forage turnip (Brassica rapa L.) cultivars sown as second crop after barley and wheat harvest in the irrigated areas of middle Anatolia in Turkey. Seeding was done after barley and wheat harvest. Four forage turnip cultivars (Agressa, Volenda, Polybra and Siloganova) were used as a research material. Effect of the seeding time on the forage turnip cultivars was significant and higher leaf and root yield were obtained from the seeding time after barley harvest. The highest root and leaf yield were obtained from Volenda cultivar. This cultivar can be grown as a second crop after barley under irrigated conditions.

Key Words: Forage turnip, root yield, leaf yield







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2005, 11 (3) 303-310
Improvement of a Spacing Drill Pneumatic System in Garlic Planting *
(Turkish)

H. Güran ÜNAL1 ve Rahmi KESKİN2
* Prepared from Ph.D. Thesis.
1 Ankara Üniv. Kastamonu Vocational School-Kastamonu
2 Ankara University Faculty of Agriculture Department of Machinery-Ankara

In this study, first of all, precision planting of garlic which is foreground processing in mechanization of garlic agriculture is purposed. For this aim, a seed spacing unit prototype which can be added onto the present spacing drill was improved. The prototype was made as 6 rows and tested 25 cm between rows, 8.8, 10, 11.6, 14 cm within rows and 1.7, 2.6, 4.7 km/h machine advancing speed in a field. With the measurement after planting, seed spacing performance, rate of germination and planting depth was determined and was statistically evaluated. Although space rate is a little above acceptable limits, all the other rates are acceptable.

Key Words: Garlic, pneumatic precision spacing drill, drilled seed, spaced seed







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2005, 11 (3) 303-310
Improvement of a Spacing Drill Pneumatic System in Garlic Planting *
(Turkish)

H. Güran ÜNAL1 ve Rahmi KESKİN2
* Prepared from Ph.D. Thesis.
1 Ankara Üniv. Kastamonu Vocational School-Kastamonu
2 Ankara University Faculty of Agriculture Department of Machinery-Ankara

In this study, first of all, precision planting of garlic which is foreground processing in mechanization of garlic agriculture is purposed. For this aim, a seed spacing unit prototype which can be added onto the present spacing drill was improved. The prototype was made as 6 rows and tested 25 cm between rows, 8.8, 10, 11.6, 14 cm within rows and 1.7, 2.6, 4.7 km/h machine advancing speed in a field. With the measurement after planting, seed spacing performance, rate of germination and planting depth was determined and was statistically evaluated. Although space rate is a little above acceptable limits, all the other rates are acceptable.

Key Words: Garlic, pneumatic precision spacing drill, drilled seed, spaced seed




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2005, 11 (3) 316-320
Fate of 14C-Aldicarb in Parasitized Spodoptera littoralis Boisd Larvae*
(English)

Dilan BAYSOYU1, Osman TİRYAKİ1 and Neşet KILINÇER2
*This study was part of Ph D thesis of Dilan (Özmen) Baysoyu
1Turkish Atomic Energy Authority, Sarayköy Nuclear Research and Training Center, Saray, İstanbul Road, Ankara-Turkey.
2Ankara University Faculty of Agriculture Department of Plant Protection, Ankara

This study was carried out to determine the fate of 14C-aldicarb in parasitized Spodoptera littoralis Boisd (Lep.: Noctuidae) larvae fed with 14C-aldicarb treated lettuce leaves. 14C-aldicarb equivalent resudues were found 17.49 % , 1.14 % and 3.4 % of initially applied radioactivity in the feces of Spodoptera littoralis and cadaver, and parasitoid (Chelonus oculator Panzer Hym.:Braconidae), respectively. Results showed that aldicarb metabolized rahioml aro excreted ouf of body by feces within 24-48 hours, before the attack of parasitoid to host organs.

Key Words: Spodoptera littoralis, Chelonus oculator, 14C-aldicarb, residual toxicity





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2005, 11 (3) 321-327
Technical Conversion Factors and Their Use for Agricultural Products Foreign Trade: Maize Example
(Turkish)

Kemalettin TAŞDAN1
1 Çukurova University Faculty of Agriculture Department of Agricultural Economics-Adana.

The main aim of this study was to give the descriptive knowledge about technical conversion factors and create applied study for their use for agricultural products' foreign trade. With this purpose, Turkey's maize and processed maize products' import and export in year 2004 were examined in study. In this examination, amount of import and export converted to maize eqivalents by technical conversion factors. In addition, concentration of foreign trade of maize equivalents was also examined. The data was collected from The Istanbul Chamber of Commerce's foreign trade statistics database for this study. With this study it was determined that Turkey's maize equivalent import is 1.2 million tons and export is 32 thousand tons in 2004.

Key Words: technical conversion factors, Agricultural Products Foreign Trade, Maize Foreign Trade







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2005, 11 (3) 328-333
Comparing the Alternative Regression Methods on Some Yield Triats of Chikpea (Cicer arietinum L.)
(Turkish)

Ufuk KARADAVUT1, Aşır GENÇ2, Abdurrahman TOZLUCA3, İsmail KINACI2, Şeref AKSOYAK1, Çetin PALTA1 and Ahmet PEKGÖR2
Bahri Dağdaş International Agricultural Reserarch Institute , Karatay-Konya
2Selçuk Univ. Faculty of Arts and Science Department of Statitistics, Kampüs-Konya
3 Selçuk University Faculty of Agriculture Department of Animal Science-Konya

Regression express that the mathematichal relationsheep between independent variables and depend variables. Dependent variables related to independent variables that is named regression function. In simple regression, relationships among one dependent and another independent variables are investigated. In this study lineer relationships between effective variables on seed weight and seed weight were investigated. The experiments were carried out in Bahri Dağdaş International Agricultural Resaech Institude's experimental areas on Damla Chikpea cultivar. In Chikpea plants the factors that effects seed yield plant high, number of branch, first bean hight, pod number, seed number, harvest index and biological yields were measured. These measurements were inquired as multiple lineer regression model ( ). Estimated values of this model, least squer method and its alternatives Ridge regression and M-Regression methods were calculated and this results compared. This study of results were suggested the most apropriate model.

Key Words: Simple regression, chikpea, alternative methods






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2005, 11 (3) 334-338
Effects of Cutting Size, Rooting Media and Planting Time on Rooting of Domat and Ayvalik Olive (Olea europaea L.) Cultivars in Shaded Polyethylene Tunnel (Spt)
(English)

Arzu ÇETİNTAŞ GERAKAKİS1 and Mücahit Taha ÖZKAYA2
1 Department of Food Science and Technology, Agricultural Univ. of Athens, Athens-Greece.
2 Ankara University Faculty of Agriculture, Department of Horticulture, Ankara-Turkey.

Domat (difficult to root) and Ayvalık (easy to root) are important olive cultivars for green table olives and olive oil respectively in Turkey. This research was carried out to obtain ready to sale nursery plants of Domat and Ayvalık. It was achieved rooting their cuttings in different sizes and under different media and taken in different times of the crop year in Shaded Polyethylene Tunnels (SPT). Cuttings were prepared in three sizes: 1, 2 and 3 nodes with two leaves. Rooting media was; I. Control (Sand), II. (Perlite: Peat: Sand: Silt) (1:1:1:1), III. (Perlite: Peat: Sand: Silt) (1:2:1:2), IV. (Perlite: Peat: Sand: Silt) (1:1:2:2), V. (Perlite: Peat: Sand: Silt) (0:0:1:1) and VI. (Perlite: Peat: Sand: Silt) (1:0:1:1). Cuttings were kept in SPT for 60 days for rooting and then kept under shade for another 30 days. Vegetative growth characteristics were determined by studying percent survival rate, callus development and rooting. While, Ayvalık cuttings formed both callus and roots, Domat cuttings formed only callus. The highest callus formation (70%) was observed on Ayvalık cuttings (1 node) taken in May in 1:0:1:1 rooting media, but the highest rooting (40%) was observed on cuttings of three nodes in the same date and media. In Domat, the highest callus was formed on cuttings (3 nodes) in May in 1:2:1:2 media. The rooting was very low in Domat however, as it was for Ayvalık too. This was probably because rooting media did not form a suitable environment for adventitious root formation. Cuttings with 1, 2 and 3 nodes carrying 2 leaves differed in percent rooting with different treatments. All three sizes of cuttings can be used in propagation by rooting for the economical use of stock material.

Key Words: Olive, Olea europaea L., domat, Ayvalık, SPT (shaded polyethylene tunnel), cutting size, rooting media





2005, 11 (3) 339-343
Detection of Rhizomania Disease in Sugar Beet Plantations of Amasya Sugar Refinery *
(Turkish)

Göksel ÖZER1 and Filiz ERTUNÇ2
*Prepared from M.Sc. Thesis.
1 TAgricultural Directorate, Yenimahalle-Ankara
2 Ankara University Faculty of Agriculture Department of Plant Protection-Ankara

In this research, the distribution of Beet necrotic yellow vein benyvirus (BNYVV), which is the most important viral disease of sugar beet known as Rhizomania, was investigated in Amasya Sugar Refinery sugar beet plantations. For this purpose, surveys were conducted to Amasya (central), Suluova, Gümüşhacıköy, Merzifon, Taşova, Havza, Göynücek, Kayabaşı, Erbaa (Tokat), and Vezirköprü (Samsun) in August 2000 and totally, 284 plant samples with roots and leaves and 279 soil samples, therefore totally 563 samples were collected from the research area. Sugar beet cv. Fiona which is susceptible to the disease was sown to soil samples as trap plant and harvested after nine weeks of growth period. I-ELISA test was performed against BNYVV by sugar beet cv. Fiona grown in the green house and sugar beet cv. Idea which is resistant to Rhizomania disease collected from the fields. As a result, only 31 of the collected samples (10,92 %) and 71 of the soil samples (26,00 %) were infested with Rhizomania disease. In order to determine the fungal structures of the vector fungus Polymyxa betae (Keskin), randomly selected 76 sugar beet cv. Fiona roots were stained in acid fuccin lacto phenol solution and examined with light microscope. The fungal cystosori were present in 47 (61,80 %) of the samples tested.

Key Words: rhizomania, beet necrotic yellow vein benyvirus-BNYVV, Polymyxa betae ( Keskin), sugar beet, Amasya







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