A. Turhan - Academia.edu (original) (raw)

Papers by A. Turhan

Tarım Bilimleri Dergisi, 2014

95 dS m-1) etkisi, verim ile toplam kuru madde, suda çözünür kuru madde, toplam şeker, toplam asi... more 95 dS m-1) etkisi, verim ile toplam kuru madde, suda çözünür kuru madde, toplam şeker, toplam asit, vitamin C ve protein gibi bazı kalite özellikleri belirlenerek değerlendirilmiştir. Deneme tesadüf parselleri deneme desenine göre 6 yinelemeli olarak sera koşullarında yürütülmüştür. Sonuçlar, farklı tuz uygulamalarının baş verimi ve kalitesi üzerine istatistikî olarak önemli etkisi olduğunu göstermiştir. Baş verimi, toplam şeker ve asit içerikleri 2.87 dS m-1 'ye kadar artış gösterirken, en yüksek suda çözünür kuru madde ve protein içeriği 4.14 dS m-1 'de elde edilmiş, söz konusu düzeylerin üzerindeki tuzluluk seviyelerinde değerler azalmıştır. Benzer biçimde, toplam kuru madde miktarı 4.14 dS m-1 'ye kadar toprak tuzluluğundan etkilenmemiş ancak bu düzeyden sonra önemli ölçüde azalmıştır. Ayrıca, tuzluluktaki artışla Vitamin C içeriği azalmıştır. Çalışma sonuçlarına göre, 4.14 dS m-1 'ye kadar toprak tuzluluğunda yeterli düzeyde kaliteli ve verimli sarımsak yetiştirilebileceği belirlenmiştir.

Bu calisma, farkli tuz (NaCl) konsantrasyonlarinin (0, 50, 100, 150 ve 200 mM), Green Gold, Laris... more Bu calisma, farkli tuz (NaCl) konsantrasyonlarinin (0, 50, 100, 150 ve 200 mM), Green Gold, Larisa, Mikado ve Ohio ispanak cesitlerinde, cimlenme yuzdesi, cimlenme enerjisi, cimlenme indeksi, cimlenme orani ve cimlenme zamani ozellikleri uzerine etkilerini arastirmak amaciyla yurutulmustur. Arastirma sonuclarina gore, farkli tuz konsantrasyonlari, soz konusu cimlenme ozellikleri uzerinde istatistiksel olarak onemli olcude etkiye sahip olmustur. Ispanak cesitlerinin cimlenme yuzdesi ve cimlenme orani ozellikleri 0–50 mM NaCl konsantrasyonlarindan etkilenmemis, cimlenme enerjisi degerleri ise dusuk oranda azalmalar gostermistir. Bu ozelliklerde onemli miktarda azalmalar 100 mM konsantrasyonu ile ortaya cikmis ve 200 mM konsantrasyonunda en dusuk degerler elde edilmistir. Cimlenme indeksi artan tuz konsantrasyonlarina bagli olarak onemli miktarda azalmis, buna karsin cimlenme suresi de uzamistir. Bununla birlikte; Green Gold cesidi, farkli tuzluluk duzeylerinde olculen parametrelerin c...

Journal of Animal and Plant Sciences, 2015

In sub-humid environments where summer drought is intense, the efficient use of water is importan... more In sub-humid environments where summer drought is intense, the efficient use of water is important for sustainable crop production. Watermelon has high water requirements. The application of deficit irrigation (DI) strategies to this crop may greatly contribute to save irrigation water. A two-year study was conducted with the aim to evaluate the effects of DI on water productivity, yield and some quality properties of watermelon in a sub-humid environment in western Turkey. Five irrigation treatments [FI-Full, DI1-deficit=100% and 50% crop evapotranspiration (ETc) restoration during whole growing season, respectively; DI2= 100% ETc up to flowering, then 50% ETc restoration; DI3=100% ETc up to yield formation, then 50% ETc restoration; DI4= 100% ETc up to ripening stage, then 50% ETc restoration] were arranged in randomized complete block design with 3 replications in both experimental years. The maximum marketable fruit yield was determined from full irrigation level. Results showed...

Tarım Bilimleri Dergisi, 2020

Humic acid (HA) efficiently enhances the uptake of nutrients of plants, especially on saline soil... more Humic acid (HA) efficiently enhances the uptake of nutrients of plants, especially on saline soil. In this study, some nutrient contents of onion in response to salinity and HA application were investigated, and effects of HA application on salinity resistance was evaluated. Research plots were established as a randomized factorial design with four replications on a lysimeter and each replication included 10 plants. Plants in the lysimeters were irrigated with tap water (control, EC: 0.3 dS m-1) and four different doses of salinized water (EC: 2.0, 4.0, 6.0 and 8.0 dS m-1). The HA (0 and 1.0 g kg-1) was applied to the soil and mixed with the soil before planting. Increasing the levels of irrigation salinity decreased contents of K, Ca, N, P, Mg, Fe, Zn, Cu and B in onion bulbs; increased contents of Na, Cl and Mn. However, the highest content of K, Ca, and N in the bulbs were obtained by HA application under different salinity levels. Similarly, the soil application of HA positively was affected the P, Mg, Fe, Zn, B contents of the bulbs. While contents of Na, Mn, and Cu were not affected by soil application, Cl was decreased. The results showed that application of HA could partially reduce the harmful effects of salt, so HA can be used as an alternative method to improve product performance in saline conditions.

African Journal of Agricultural Research, Oct 31, 2009

This research was carried out in years 2005 and 2006 in order to compare quality characteristics ... more This research was carried out in years 2005 and 2006 in order to compare quality characteristics of some tomato genotypes grown in Turkey. In the study, 33 tomato (Lycopersicon esculentum Mill.) genotypes were used as plant material. Research was laid out in randomized block design with 3 replications, 10 plants in each replication. The fruit was analyzed for dry matter weight, sugar content, soluble solid content, titratable acids and pH contents. According to the results, 40443 and 62573 genotypes with their high values of dry matter content, sugar, soluble solid content and appropriate levels of titratable acids and pH contents should be considered potential candidates in future breeding, fresh and processing tomato programs.

Journal of Power Sources, 2008

Liquid water stored in the diffusion media (DM) in a polymer electrolyte fuel cell (PEFC) can dra... more Liquid water stored in the diffusion media (DM) in a polymer electrolyte fuel cell (PEFC) can dramatically impact steady and transient performance, degradation, and heat transfer. In this study, seven different flow-field designs, with landing-to-channel (L:C) ratio from 1:3 to 2:1, were investigated at dry and fully humidified conditions, using neutron imaging. The results revealed the impact of flow-field geometry on stored liquid overhead is significant. In some cases, the stored water content in the cell can be nearly double that of another design, despite similar performances at low to medium current density. In general, a smaller L:C ratio reduces flooding losses and minimizes the stored water content. Additionally, the channel-DM interface plays a key role. For the same L:C ratio, a reduced number of channel-DM interfaces was shown to reduce flooding and stored liquid water content at steady state. This also suggests that using proper flow-field design can decrease the parasitic power consumption and the stored water content in the cell without any sacrifice from the cell performance. For dryer operating conditions, however, membrane dehydration becomes a dominant effect and a high landing-to-channel ratio flow-field is higher performing.

Öz: Bu çalışmada, hıyarın verim ve meyve özellikleri üzerine farklı sulama suyu tuzluluk düzeyler... more Öz: Bu çalışmada, hıyarın verim ve meyve özellikleri üzerine farklı sulama suyu tuzluluk düzeylerinin [0.3 (kontrol), 1.7, 2.7, 3.7, 4.7, 5.7 ve 6.7 dS m -1 ] etkileri değerlendirilmiştir. Araştırma, tesadüf parselleri deneme desenine göre altı tekrarlamalı olarak yürütülmüştür. Bitkiler, sera içine yerleştirilmiş varillerde ve her tekerrürde 1 bitki olacak biçimde yetiştirilmiştir. Araştırma sonuçlarına göre, sulama suyu tuzluluğu arttıkça meyve verimi azalmıştır. Sulama suyu ve toprak tuzluluğu eşik değerleri sırasıyla 1.47 ve 2.11 dS m −1 olarak saptanmıştır. Bu sonuç, söz konusu eşik değerlerinin üzerinde hıyar veriminde azalma olabileceğini göstermektedir. Meyve ağırlığı 1.7 dS m −1 , meyve çapı, boyu ve su içeriği ise 2.7 dS m −1 ’e kadar sulama suyu tuzluluğundan etkilenmemiş, ancak bu değerlerin üzerinde artan tuzluluk söz konusu meyve özelliklerini azaltmıştır. Tuzluluk düzeyi 3.7 dS m -1 ’e kadar arttıkça suda çözünür kuru madde artmış ancak daha yüksek tuzluluk düzeylerin...

OZ, M., A. KARASU, A. TURHAN, H. CELIK, A. Tanju GOKSOY and Z. M. TURAN, 2011. The effects of dif... more OZ, M., A. KARASU, A. TURHAN, H. CELIK, A. Tanju GOKSOY and Z. M. TURAN, 2011. The effects of different doses of salt in the initial development periods of some sunflower genotypes . Bulg. J. Agric. Sci., 17: 442-450 In this research carried out in the greenhouse of Uludag University, Mustafakemalpasa Vocational School, the initial development of 11 lines (CMS01, CMS10, CMS23, RHA03, RHA10, CMS01 x RHA03, CMS01 x RHA10, CMS10 x RHA03, CMS10 x RHA10, CMS23 x RHA03 and CMS23 x RHA10) and two varieties (MAY AGRO and SANAY) of sunflower, with four different doses of salt (0, 4, 8 and 12 dSm -1 ) was examined. Ion analysis was done at the Faculty of Agriculture, Department of Soil Laboratory. The roots and leaves of the plants were analyzed for variation with respect to salt dosage in terms of the concentrations of Ca, Na and K and the ratios of Ca/Na and K/Na. According to our research results, Ca, K, Ca/Na and K/Na ratios as opposed to the increase of salt dose reduced, but Na ratios i...

African Journal of Biotechnology, 2009

In order to determine the predictive screening parameters that can be applied at early developmen... more In order to determine the predictive screening parameters that can be applied at early development stages of tomato plants, 18 tomato cultivars were grown in nutrient solution with 12 dS m-1 NaCl. The research was conducted in a completely randomized design with tree replications. The relationships among the salinity and root, stem, leaf accumulation, K+/Na+ and Ca2+/Na+ ratios and root-stem-leaf dry weights were investigated. At the end of treatment, regarding studied parameters morphologic and physiologic changes were determined depending on increasing NaCl concentrations. With increasing concentrations, it was determined that all growth parameters were decreased. However, this decrease in salt tolerant cultivars was restricted as compared to salt sensitive cultivars. It was also determined that by increasing NaCl applications, the amount of Na+ was increased and, the amount of Ca2+ and K+ ions were decreased in salt tolerant cultivars same with growth parameters. Thus, it was con...

Horticultural Science, 2011

The aim of the study was to find effects of tomato grafting on another cultivar. The tomato culti... more The aim of the study was to find effects of tomato grafting on another cultivar. The tomato cultivars used as scions were Yeni Talya, Swanson and Beril. Cultivars used as rootstocks were Beaufort and Arnold. Cleft grafting methods were applied. The following characteristics of grafted and nongrafted plants were recorded: fruit index, number of fruits/truss, fruit weight, fruit yield, dry matter, pH, concentration of soluble solids, titratable acidity, total sugar and lycopene and vitamin C. The results showed that fruit yield and fruit index, number of fruits/truss and fruit weights were improved by grafting. Fruit quality, measured in terms of dry matter, concentration of soluble solids, total sugar, and vitamin C content, was lower in the fruits of grafted plants than in nongrafted ones. No significant difference in lycopene and pH content was found. Titratable acid content was improved by grafting. A positive effect of grafting was recorded when Beaufort was used as rootstock. Th...

Tarım Bilimleri Dergisi, 2014

Books by A. Turhan

Gece Kitaplığı Yayınevi, 2023

Saffron is a plant that requires good experience, effort, and patience to grow. Due to these rea... more Saffron is a plant that requires good experience, effort, and patience to
grow. Due to these reasons, the annual production amounts throughout the
world remain at very low levels, and their economic value is quite high.
The cultivation of the saffron plant is carried out in some villages in the
Safranbolu district, which is controlled by the state. It has been one of the
most important endemic plants in Turkey in recent years.
Although saffron is mostly used in medical studies; It is also widely
used in various fields such as paint, food, and cosmetics. Due to its high
economic value, it has been observed that the studies on the usability of
saffron in animals are very limited. We can say that the use of saffron in
animal husbandry has only recently been investigated, and therefore its
effects on animals and animal products have not been fully revealed.
In particular, it has been tried to evaluate the researches made in poultry in detail. In general, it has been observed that researchers are trying to
determine the usability of saffron as a feed additive. In research; It has been
tried to determine whether saffron has an effect on the lipid oxidation levels of eggs by adding saffron to animal feeds. In addition, the effects of saffron on egg production, feed consumption, feed efficiency, egg weight, and
egg quality criteria (shape, yolk index, shell thickness, Haugh unit, etc.)
were investigated. In some studies, the effects on the yield performance of
animals and their anti-obesity effectiveness were investigated.
It is very important that the cultivation of saffron, which is almost a
blessing for humanity, is sustainable. The countries where production can
be made around the world should give importance to saffron production
due to both its pharmacological properties and its economic value, and
they should provide all the conveniences to the producers at this point.
Future studies are needed to determine the effects of saffron on animals and
animal products in animal husbandry.

Tarım Bilimleri Dergisi, 2014

Journal of Animal and Plant Sciences, 2015

Tarım Bilimleri Dergisi, 2020

African Journal of Agricultural Research, Oct 31, 2009

Journal of Power Sources, 2008

African Journal of Biotechnology, 2009

Horticultural Science, 2011

Tarım Bilimleri Dergisi, 2014

Gece Kitaplığı Yayınevi, 2023