Yazar "Yilmaz, Saban" seçeneğine göre listele
Listeleniyor 1 - 12 / 12
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe The analysis on the impact of the roof angle on electricity energy generation of photovoltaic panels in Kahramanmaras, Turkey-A case study for all seasons(Aip Publishing, 2015) Yilmaz, Saban; Ozcalik, Hasan Riza; Dincer, FurkanPhotovoltaic (PV) panels absorb solar energy most when solar radiation perpendicularly reaches on upon surface. This leads to the notion of optimal roof angle. Optical and geometrical properties of the panels are of vital importance in order to obtain maximum energy from the Sun. Therefore, this study focuses on the horizontal roof angle which has a crucial impact on the performance of PV panels. Total solar radiation, optimal roof angle and effects of different angles on PV panels in Kahramanmaras province of Turkey on different days are numerically and experimentally analyzed and discussed. Additionally, roof angle influences the amount of solar radiation reaching on the surface and varies depending on the geographic location and seasons. 7.9% more energy can be generated in the proposed systems where roof angle can be daily adjusted. This greatly influences the amount of solar energy when optimal roof angles are calculated annually depending on the seasons in a region. However, it is quite costly and challenging to adjust the roof angle as far as a building is concerned. (C) 2015 AIP Publishing LLC.Öğe Comparison of Chemical Composition in Lupin (Lupinus spp.) Species(Revista Chimie Srl, 2015) Yilmaz, Saban; Atak, Mehmet; Erayman, MustafaThe aim of this study was to investigate the chemical characteristics of seeds in two cultivated bitter landraces of Lupinus albus and two wild Lupinus angustifolius types in Mediterranean environment (Hatay, southern Turkey). Fat quantity and fatly acid quality were considerably different depending on the genotype. L. albus showed the higher oil content (74.0-85.1 g/kg), saturated fatty acids (16.88-19.3 g/100 g), monounsaturated fatty acids (55.80-57.62 g/100 g) and polyunsaturated fatly acids (24.8-25.5 g/100 g) than did L. angustifolius with oil content of 38.8-46.69 g/kg; saturated fatty acids of 23.40-25.12 8/100 g, monounsaturated fatty acids of 51.48-52.98 g/100 g and polyunsaturated fatty acid of 23.4-23.6 g/100 g. The data obtained suggest L. albus as the most interesting lupin species for aiding the crop-livestock food chain and wild L. angustifolius type as a promising crop due to its high nutritive traits for the Mediterranean environment.Öğe Design of two axes sun tracking controller with analytically solar radiation calculations(Pergamon-Elsevier Science Ltd, 2015) Yilmaz, Saban; Ozcalik, Hasan Riza; Dogmus, Osman; Dincer, Furkan; Akgol, Oguzhan; Karaaslan, MuharremPhotovoltaic systems have gained a great deal of interest in the world and these studies performed on this subject have been gaining more and more importance. In order to design new PV systems that will be installed to operate in more efficient and more feasible way, it is necessary to analyze parameters like solar radiation values, the angle of incidence of the genus, temperature etc. Therefore, in this study, theoretical works have been performed for solar radiation and angle of incidence values of any location, plus an experimental study was carried out on a system tracking the sun in two axes and in a fixed system. The performed prototype is also adapted into a PV system with 4.6 kW power. Theoretical data are consistent with the data obtained from the PV system with 4.6 kW power. This study will be an important guide for the future PV power stations. (C) 2014 Elsevier Ltd. All rights reserved.Öğe The Effect of Cultivar and Stage of Growth on the Fermentation, Aerobic Stability and Nutritive Value of Ensiled Quinoa(Galenos Publ House, 2023) Ertekin, Ibrahim; Atis, Ibrahim; Yilmaz, SabanQuinoa has the potential to be an important alternative source of silage as a forage crop. However, there is limited information on the ensiling of quinoa in the literature. This study investigates the silage fermentation quality, nutritive value and aerobic stability of quinoa cultivars harvested at different plant growing stages. The experiment was carried out in the experimental area of the Hatay Mustafa Kemal University, Faculty of Agriculture in the 2019 and 2020 growing seasons. The experiment was laid out in a split plot with a randomized block design with three replications, the three main plots were based on harvesting times (flowering, milky and dough stages) and the five sub-plots were based on cultivars (Mint Vanilla, Cherry Vanilla, French Vanilla, Red Head and Titicaca). Traits such as pH, ammonia nitrogen, lactic acid bacteria (LAB), LA, acetic acid (AA), butyric acid (BA), propionic acid, ethanol (EtOH), dry matter (DM), neutral detergent fiber, acid detergent fiber, acid detergent lignin, crude protein, ash, ether extract, water soluble carbohydrate (WSC) and relative feed value were analyzed in order to determine silage fermentation quality and nutritive value. In addition, all silages were evaluated in terms of aerobic stability. In reference to the interaction effects, pH, ammonia nitrogen, LAB, AA, BA and EtOH, the silage fermentation quality parameters were between 3.83-4.16, 5.57-14.83%, 4.69-5.80 log10cfu/g DM, 1.37-2.10%, 0.32-0.51% and 0.79-1.63, respectively. On the other hand, DM, ADF, ash and WSC changed between 21.95-33.36%, 22.39-28.36%, 15.41-17.70% and 2.35-9.50%, respectively, as silage nutritive composition features. The carbon dioxide production values of silages exposed to air were between 5.49 g/kg and 10.26 g/kg according to interactions. Among the evaluated quinoa cultivars, cv. Titicaca and cv. French Vanilla provided superior results in terms of fermentation quality compared to other cultivars. It was also determined that it would be more appropriate to harvest these superior quinoa cultivars during the dough stage for quality silage. Among the silages, the cv. Titicaca had the best aerobic stability. As a result of this study, it was concluded that cv. French Vanilla and cv. Titicaca should be harvested during the dough stage in order to obtain better silage quality. According to the results of this study, it was deduced that the quinoa plant could be an alternative ensiling crop.Öğe Effect of Harvesting Time on Yield, Composition and Forage Quality of Some Forage Sorghum Cultivars(Friends Science Publ, 2012) Atis, Ibrahim; Konuskan, Omer; Duru, Metin; Gozubenli, Huseyin; Yilmaz, SabanForage sorghum (Sorghum bicolor (L.) Moench) is one of the most important fresh fodder and silage sourdein the world, and its quality and yield are difectly related in the harvesting time. In this study, four forage sorghum cultivars (Sorghum bicolor (L.) Moench) were compared to determine effects of delayed harvesting time on the changes in yield and forage quality. Field experiments were conducted during the 2010 and 2011 growing seasons. Four forage sorghum cultivars (Early Sumac, Leotti, Nes, Rox) were harvested at four different growing stages (panicle emergence stage (PE), milky stage (MS), dough stage (DS) and physiologic maturity stage (PM)). Dry matter, fresh forage yield, plant height, dry matter content, panicle proportion, protein yield, lignin content and relative feed value (RFV) tended to increase with advanced plant maturity, while leaf proportion, protein content, neutral detergent fiber content (NDF), acid detergent fiber content (ADF), cellulose content and hemicellulose content tended to decrease. Dry matter contents of all sorghum cultivars harvested during the PE and MS. stages were below 247 g kg(-1). Among whole plant organs, stem proportion was higher than those of leaf and panicle proportions. Mean dry matter yields of cultivars were ranged from 18.75 t ha(-1) to 20.15 t ha(-1). These findings have shown that suitable harvesting time of forage sorghum is PM stage for high yield and fodder quality, but it may be harvested at DS stage due to increasing lignin content. None of these sorghum cultivars should be harvested before DS stage for ensilage due to low dry matter content. Nes can be preferred because of the high forage and protein yield. 2012 Friends Science PublishersÖğe THE EFFECTS OF CUTTING INTERVALS AND SEEDING RATES ON FORAGE YIELD AND QUALITY OF ALFALFA(Soc Field Crop Sci, 2019) Atis, Ibrahim; Celiktas, Nafiz; Can, Ersin; Yilmaz, SabanUnderstanding the effects of seeding rate and cutting intervals on dry matter yield and nutritive value may help to optimize of alfalfa production. The objective of this study was to investigate the optimum cutting interval and seeding rate of two cultivars of alfalfa (cv. Alsancak and cv. Nimet). Field experiments were carried out for 3 years in Mediterranean ecological conditions. The treatments were comprised of three cutting programs at 20, 30 and 40 days interval and two seeding rates (15 and 30 kg ha(-1)). The experiment was designed a split-split plot in a randomized complete block with 3 repetitions. The main plots were cutting intervals, sub-plots were seeding rates and sub -subplots were assigned as alfalfa cultivars. The results of the research showed that all properties inspected were significantly affected from the cutting intervals, the effect of the seeding rate and the cultivars were found to be not significant (except fresh forage yield). While the extended cutting intervals increased the forage yield, it reduced the forage quality. In terms of satisfactory forage yield and quality for similar ecological conditions, 30 days cutting interval and 15 kg ha(-1) seeding rate have been advisable.Öğe Effects of different nitrogen doses and cultivars on fermentation quality and nutritive value of Italian ryegrass (Lolium multiflorum Lam.) silages(Asian-Australasian Assoc Animal Production Soc, 2022) Ertekin, Ibrahim; Atis, Ibrahim; Aygun, Yusuf Ziya; Yilmaz, Saban; Kizilsimsek, MustafaObjective: The fermentation profile and silage quality of 3 Italian ryegrass (Lolium multiflorum Lam.) cultivars (cvs. Devis, Hellen, and Trinova) treated with 5 nitrogen doses (0, 50, 100, 150, and 200 kg/ha) were evaluated. Methods: The experiment was laid out in split plot in randomized complete block design with three replications. Annual ryegrass cultivars used in this study have been commonly grown in Turkey. Nitrogen doses were set in main plot and cultivars in split plot in the field. Plants were harvested at full-flowering stage with dry matter content about 220 g/kg for first cutting and 260 g/kg for second cutting. Harvested plants were chopped theoretically into 2 to 3 cm lengths for ensiling. Chopped fresh materials were ensilaged by compressing in 2 L plastic jars about 3 +/- 0.1 kg. Results: Effects of N doses on dry matter, neutral detergent fiber, acid detergent fiber, dry matter digestibility, relative feed value, crude protein, pH, ammonia nitrogen, lactic acid, acetic acid, and lactic acid/acetic acid were statistically significant while water soluble carbohydrate, ash and organic matter were not statistically different. Ammonia nitrogen, crude protein, ash, organic matter, lactic acid, and lactic acid/acetic acid were affected by cultivars, but the other parameters were not. Increasing nitrogen applications positively affected the chemical composition of annual ryegrass silage. The significant increase in protein content was remarkable, however, silage fermentation properties were adversely affected by the increasing nitrogen dose. Conclusion: It can be recommended 150 kg/ha nitrogen dose for annual ryegrass harvested at full blooming stage. Even though the silage fermentation properties of the used cultivars were similar, cv. Devis gave better results than the others in terms of silage pH and relative feed value.Öğe THE EFFECTS OF SOWING DESIGNS ON FORAGE YIELD AND QUALITY OF SWEET SORGHUM AND MUNG BEAN MIXTURES UNDER MEDITERRANEAN CONDITIONS(Soc Field Crop Sci, 2022) Ertekin, Ibrahim; Yilmaz, SabanThis study was conducted to determine the effects of sowing designs on forage yield and quality in sweet sorghum and mung bean grown as binary mixture with different cultivation systems in Mediterranean conditions under second crop season during 2019-2020. As sowing design, twin -row (20x55 cm row spacing), narrow-row (55 cm row spacing) and conventional-row (75 cm row spacing) were used. The mixtures were formed based on the plant density and alternative row numbers of sweet sorghum and mung bean. Sowing was done on alternating rows of 1 row of sweet sorghum and 1 row of mung bean and 2 rows of sweet sorghum and 1 row of mung bean. The plant density of sweet sorghum was 14 plants m-2 and plant densities of mung bean were 14 plants m-2, 21 plants m-2 and 28 plants m-2. This experiment was planned as two-factor (sowing designs and mixtures) and conducted in randomized complete block design arranged in split plot with 3 replications. To evaluate the forage yield and quality, fresh forage yield, dry matter yield, NDF, ADF, ADL, crude ash crude protein and ether extract characteristics were examined. In addition, the intercropping potential of mung bean and sweet sorghum mixtures was evaluated by the land equivalent ratio. As a result of the present study, mixed cultivation of 14 plants m-2 with one row of sweet sorghum and 14 plants m-2 with one row of mung bean gave the best results in narrow row sowing design. It was concluded that an efficient and high quality intercropping system can be realized in the second crop conditions in regions where Mediterranean climatic conditions prevail, especially for mung beans and sweet sorghum.Öğe FORAGE YIELD AND QUALITY OF QUINOA (Chenopodium quinoa Willd.) GENOTYPES HARVESTED AT DIFFERENT CUTTING STAGES UNDER MEDITERRANEAN CONDITIONS(Soc Field Crop Sci, 2021) Yilmaz, Saban; Ertekin, Ibrahim; Atis, IbrahimGenotype choosing and cutting stage are very significant to obtained better forage yield and quality. However, researches about forage production from quinoa plant genotypes harvested at different cutting stages are not enough in Mediterranean conditions. This study was conducted to determine the forage yield and quality of five different quinoa genotypes (Red head, Cherry vanilla, French vanilla, Mint vanilla and Titicaca) at three different cutting stages (flowering, milky and dough). The experiment was laid out in split plot of randomized complete blocks with three replications in 2019 and 2020 years. To evaluate the forage yield and quality of different quinoa genotypes harvested at different cutting stages, plant height, stem diameter, dry forage yield, dry matter content, water soluble carbohydrate, neutral detergent fiber, acid detergent fiber, acid detergent lignin, condensed tannins, ether extract, crude protein, crude ash, organic matter, non-fiber carbohydrate and relative feed value properties were investigated. As a result of the research, it was determined that it is appropriate to harvest quinoa as a roughage source at the dough stage, and that Mint vanilla genotype is the most productive genotype.Öğe Genotype and plant density effects on corn (Zea mays L.) forage yield(Asian Network for Scientific Information, 2007) Yilmaz, Saban; Gozubenli, Huseyin; Konuskan, Omer; Atis, IbrahimCorn forage is an important source of feedstuff for beef and dairy catties. A two-year study was conducted in Eastern Mediterranean Region of Turkey to determine the optimum plant densities for forage yields of com genotypes commercially grown in Eastern Mediterranean Region during 2000 and 2001 growing seasons. The experimental design was a randomized complete block in a split-plot arrangement with three replications. Main plots were com hybrids of Dracma, Pioneer 3223, Pioneer 3335, Dekalb 711 and Dekalb 626 and Arifiye. Split-plots were plant densities of 143 000, 114 000, 95 000, 82 000 and 71 000 plant. Split-plot size was 2.8 m by 5.0 m with four rows per plot. The effects of corn genotypes and plant densities on the forage and dry matter yield and some agronomic characteristics were significant. The highest forage and dry matter yields were obtained from Dracma genotype (69.5 and 27.01 ha-1, respectively). The highest forage and dry matter yield obtained at 114000 and 143000 plant densities (64.4 and 62.31 ha-1 forage yield and 24.8 and 23.11 ha-1 dry matter yield, respectively). © 2007 Asian Network for Scientific Information.Öğe A Low Cost Shading Analyzer and Site Evaluator Design to Determine Solar Power System Installation Area(Hindawi Ltd, 2015) Kesler, Selami; Kivrak, Sinan; Gurleyen, Hilmi; Dincer, Furkan; Yilmaz, Saban; Ozcalik, Hasan RizaShading analyzer systems are necessary for selecting the most suitable installation site to sustain enough solar power. Afterwards, changes in solar data throughout the year must be evaluated along with the identification of obstructions surrounding the installation site in order to analyze shading effects on productivity of the solar power system. In this study, the shading analysis tools are introduced briefly, and a new and different device is developed and explained to analyze shading effect of the environmental obstruction on the site on which the solar power system will be established. Thus, exposure duration of the PV panels to the sunlight can be measured effectively. The device is explained with an application on the installation area selected as a pilot site, Denizli, in Turkey.Öğe Plant density and mixture ratio effects on the competition between common vetch and wheat(2012) Atis, Ibrahim; Kokten, Kagan; Hatipoglu, Rustu; Yilmaz, Saban; Atak, Mehmet; Can, ErsinMixtures of annual forage legumes with winter small grains for forage are practiced traditionally in the Mediterranean countries. The aim of the present study was to investigate the effects of variable seed mixture rates and different plant densities on the forage yield. The study also investigated the competition effects among mixture partners in the mixture of common vetch (Vicia sativa L.) and wheat (Triticum aestivium L.). Field trials were conducted at two locations (L1, Hatay and L2, Adana) during the 2008-09 and 2009-10 growing seasons. Three plant densities (200, 400, 600 plants m-2) and five seed mixture ratios (100 % V, 75% V + 25% W, 50% V + 50% W, 25% V + 75% W, 100 % W) of common vetch (V) and wheat (W) were used. The results of the study showed that increased plant density in the mixture resulted in increased dry matter yield per unit area. In addition, increased seed ratio of wheat in the mixture caused increased dry matter yield per unit area. Also, elevated dry matter yield resulted in increased crude protein yield. Land equivalent ratio (LER), aggressivity (A) and competitive ratio (CR) indexes showed that common vetch was the dominant species in all common vetch-wheat mixtures.
