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Öğe Change of Some Soil Quality Characteristics under Different Pasture Reclamation Methods of Rangelands(Galenos Publ House, 2013) Turkmen, Cafer; Müftüoğlu, Nuray Mücella; Kavdir, YaseminThe present study was conducted to investigate the effects of different pasture reclamation methods on soil characteristics. For this purpose, soil samples were taken from 0-15 and 15-30 cm depths of the pasture lands subjected to 5 different reclamation processes from 8 different locations of each process during the second week of May of 2008 and 2009. Soil reaction, soil salinity, lime content, total carbon, total nitrogen, aggregate stability, bulk density, particle density, catalase and urease enzyme activities and mesophyllic aerobic microorganism count tests were carried out on soil samples for two years. Effects of reclamation processes on soil reaction, soil salinity, lime content, total nitrogen, aggregate stability, catalase enzyme activity and mesophyllic microorganism counts found to be significant at P<0.01 level. Effects of treatments on total carbon and urease enzyme activity were found to be significant at P<0.05 level. Effects of soil depth on soil salinity, total carbon, catalase and urease enzyme activities were found to be significant at P<0.01 level; soil reaction, total nitrogen, aggregate stability, bulk density, partical density and mesophyllic microorganism counts were found to be significant at P<0.05 level. Interactions of treatments and depth were not significant at any level.Öğe DETERMINATION OF THE EFFECTS OF HYDROGEL ON IRRIGATION PROGRAM FOR MAIZE CULTIVATED IN THE FIELD CONDITIONS(Univ Agricultural Sciences & Veterinary Medicine Bucharest, 2016) Tekiner, Murat; Yildirim, Murat; Turkmen, Cafer; Oral, Ayhan; Izci, BahriThe experiment was carried out at the research center of Canakkale Onsekiz Mart University in Turkey in summer of 2010 and 2011 to determine the effects of hydrogel (organic polymer) on the grain yield and plant development parameters. Maize DKC 5783, a commonly used variety by farmers in Turkey, was used as an indicator plant and the seeds were sowed to different lysimeters having a volume of 1 m(3). The chemical properties of hydrogel and its water holding capacity were determined under laboratory conditions. According to the treatments, certain amounts of hydrogel were mixed to the first 20 cm of the soil from the surface level. Irrigation water was applied in a controlled manner by a scaled container to the root area of maize. Plant development parameters were observed in each development stage. As a result of this study, it was seen that the amount of hydrogel mixed to the soil in different amounts had a significant effect on the plant development parameters, grain yield and also irrigation water use efficiency.Öğe Influence of Humic Acid on Availability of Zn, Cu, Mn, Fe in Soils(Asian Journal Of Chemistry, 2014) Turkmen, Cafer; Sungur, AliThe objective of this study was to investigate the influence of an organic substance, humic acid, on availability of extractable Zn, Cu, Mn and Fe in soils. Humic acid was applied in four different doses (0, 3, 6 and 12 L/da) and all treatments were incubated. During the incubation, soil samples were taken at four different times (I, II, IV and VIII weeks). In these soil samples Cu, Fe, Mn and Zn ions were extracted through diethylene triamine pentaacetic acid method and flame atomic absorption spectrometer was used for elemental analyses. Statistical analyses were performed by using MINITAB-16 statistical software program. Results revealed significant differences in Fe, Mn and Zn concentrations of dose-time interaction at p < 0.01 level and in Cu concentrations at p < 0.05 level. The differences in pH values of dose-time interaction were also found to be significant at p < 0.01 level. With regard to sampling times, the differences in electrical conductivity values were found to be significant at p < 0.01 level.Öğe Microbial Quality in Coastal Waters of Dardanelles in Relation to the Pollution Sources and Transport Pathways(Wiley, 2012) Turkmen, Cafer; Ayyildiz, Onder; Akbulut, Mehmet; Kaya, HasanThe coastal water quality of Canakkale Dardanelles (Turkey) was assessed based on bacteriological data and physicalchemical parameters. Total coliform (TC), fecal coliform (FC), and enterococci (ENT) bacteria along with physicochemical parameters were measured monthly up to a year at 12 different sampling sites located through both coastal lines of the strait. The fecal bacteria were abounded at several sampling sites such as B1, B3, G3, and G4 due to direct wastewater discharges and septic leakages or overloading. Storm water runoff and sediment resuspension were important pathways for the transport of coliform and ENT bacteria to the Dardanelles, as the region receives high precipitation and strong winds for most part of the year. The values of pH, temperature, and salinity were in typical ranges for the studied area. The microbiological and physicochemical data were correlated individually and in combination. The best fit correlations for bacterial data were attained between TC and FC or TC and ENT (R?=?0.67 or -0.68), while those for the combined data were obtained for TC with temperature (R?=?0.94) and TC with salinity (R?=?-?0.70).Öğe Nutrient potential and mineral contents of some vegetable cluster bean genotypes(Wiley, 2020) Akcura, Mevlut; Müftüoğlu, Nuray Mücella; Kaplan, Mahmut; Turkmen, CaferBackground and objectives This study was conducted to determine nutritional traits and mineral contents of green pods of ten different vegetable cluster bean genotypes. Findings Except for N, Cu, and crude fiber contents, differences in the other parameters of the genotypes were found to be significant (p < .01). Crude ash contents varied between 5.29%-8.30%, crude oil contents between 0.60%-0.78%, crude fiber contents between 13.96%-16.04%, total phenolics between 1.45-2.16 mg GAE/100 g and antiradical capacities between 14.02%-21.50%. For macronutrients, nitrogen contents varied between 23.01-27.56 g/kg, phosphorus contents between 2.31-2.73 g/kg, potassium contents between 22.59-25.38 g/kg, calcium contents between 6.89-8.91 g/kg, magnesium contents between 5.26-6.38 g/kg and sodium contents between 30.80-60.91 g/kg; for micronutrients, iron contents varied between 88-124 mu g/g, copper contents between 5.99-7.47 mu g/g, zinc contents between 8.25-16.55 mu g/g, manganese contents between 17.68-20.93 mu g/g, and boron (B) contents between 24.13-26.78 mu g/g. Conclusions The genotype-by-trait (GT) biplot method was used for visual assessment of the relationships among the investigated traits and to group the genotypes based on correlations among the studied traits. Investigated traits fell into four groups in the resultant GT biplot. Significance and novelty The nutritional attributes of green pods of vegetable cluster beans were investigated for the first time in the Mediterranean basin (canakkale - Turkey), and quite valuable outcomes were achieved. The green pods of vegetable cluster beans had higher values for the majority of investigated minerals than several vegetables. Additionally, 100 g consumption of green pods of cluster beans provided quite high nutrient uptakes for the human body.Öğe Potential of meadowfoam (Limnanthes alba) seed meal as an organic source of nitrogen(Elsevier Science Bv, 2018) Turkmen, Cafer; Myrold, David D.Meadowfoam (Limnanthes alba Hartw. Ex Genth.), a member of the Brassicales order, is grown for its oil, which generates seed meal as a by-product. The potential of meadowfoam seed meal (MSM) for agronomic purposes is relatively unexplored, although MSM has shown promise for weed and pest control. Because of its high protein content, MSM may also be useful as an organic N fertilizer. The objective of this research was to characterize the dynamics of C and N released from MSM during its decomposition. The potential of MSM to produce plant-available N was evaluated in a laboratory incubation using rates similar to those applied in field studies of its weed control potential. Respiration (CO2 production rate), the activities of two enzymes involved in the degradation of MSM (beta(1,4)-glucosidase and leucine aminopeptidase), and inorganic N (NH4+ and NO3-) were measured during a 56-d period. Respiration peaked during the first week, indicating rapid MSM decomposition, which was coincident with maximum potential activity of leucine aminopeptidase. Inorganic N (dominantly NH4+) peaked later, at two weeks, when about half of the N in the added MSM had been mineralized. Nitrification was delayed until six weeks, presumably because of inhibitory effects of the MSM, a phenomenon observed with seed meals of other brassicaceous plants. These results demonstrate the potential use of MSM as a slow-release, organic N amendment in crop production systems.Öğe Vermicompost effects on wheat yield and nutrient contents in soil and plant(Taylor & Francis Ltd, 2012) Kizilkaya, Ridvan; Turkay, F. Suheyda Hepsen; Turkmen, Cafer; Durmus, MuratVermicomposting of organic waste can play an important role in integrated waste management strategies. Ability of the earthworm Eisenia foetida to transform anaerobically digested sewage sludge (SS) amended with hazelnut husk (HH) and cow manure (CM) in different proportions (0% SS + 50% HH + 50% CM; 10% SS + 45% HH + 45% CM; 20% SS + 40% HH + 40% CM; 30% SS + 35% HH + 35% CM; 40 SS% + 30% HH + 30% CM; 50% SS + 25% HH + 25% CM) was studied in a greenhouse experiment in terms of the effects of vermicompost on wheat (Triticum aestium) yield and nutrient content in soil and plant. All vermicomposted and non-vermicomposted mixtures exhibited positive effect on the yield and nutrient concentrations of wheat compared to the control pots. The vermicomposted organic waste mixtures showed comparatively better effect on plant production than the non-vermicomposted organic waste mixtures. Vermicomposted 50% SS + 25% HH + 25% CM mixtures showed the highest positive effect on yield compared to the other treatments.
