Browsing by Author "Gülser, F."

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Changes in Some Soil Properties of Wheat Fields Under Conventional and Reduced Tillage Systems in Northern Iraq
(Federation of Eurasian Soil Science Societies, 2020) Gülser, F.; Salem, S.; Gülser, C.
In this study, the effects of reduced tillage (RT) and conventional tillage (CT) systems on some soil properties of wheat fields in Northern Iraq (Duhok Province) under a hot and dry climatic condition were investigated. This study was carried out in a randomized plot design with four replications at three locations (Bardrash, Sumail, and Zakho) in the seasons 2017-2018. Four fields in each location at Duhok Province were equally separated into two groups for CT and RT systems. A group of 24 soil samples for each tillage system were taken from the locations. Soil organic matter content, pH, EC, bulk density and total porosity values were significantly (p<0.05) affected by different tillage systems. Soil pH, EC and bulk density values generally significantly reduced with the RT compared with CT. On the other hand, soil OM content and total porosity were significantly increased with the RT system in all locations under a hot and dry climatic condition. In all locations, RT system decreased bulk density and increased total porosity with conserving soil OM due to preventing from rapid mineralization. However, rapid mineralization of soil OM in the CT system under dry climate condition caused increases in EC which indicated that there were high soluble ions in soil solution. © 2020 Federation of Eurasian Soil Science Societies. All rights reserved.
The Determination of Nutrition Status of Tomatoes Grown in Van Province and Soil Properties of Common Fields
(Centenary University, 2018) Bayram, S.; Gülser, F.
This study aimed to determine nutrition status of tomatoes in Erciş, Gevaş and Edremit towns province Van where tomato widely cultivated. According to results of soil and plant samples an analyses, organic matter (≤ 2.5%), nitrogen (≤ 0.90%) and phosphorus (≤ 8.0 mg kg -1 ) content were determined at unsufficient levels in soils. Nitrogen contents of plants were determined as 2.3% at in unsufficient levels. In the same location, significant differences among gardens were found about soil properties and nutrient content of plant. © 2018, Centenary University. All rights reserved.
Effects of Deforestation on Soil Properties and Organic Carbon Stock of a Hillslope Position Land in Black Sea Region of Turkey
(Federation of Eurasian Soil Science Societies, 2021) Gülser, C.; Ekberli, İ.; Gülser, F.
The effects of deforestation on soil properties and soil organic C (SOC) stock in adjacent pasture and forest areas located on the same hillslope position were investigated. The soil properties measured in the forest site had higher coefficient of variation compared with pasture site. Deforestation made almost 50 years ago significantly increased bulk density (Db), soil pH, exch. Mg and significantly decreased total porosity (F), gravimetric moisture content (W), EC, exch. K, soil organic matter (OM), SOC stock in 0-15 cm soil depth in pasture site. Mean Db increased fom 1.24 g/cm3 in forest to 1.42 g/cm3 in pasture while mean values of OM and SOC stock depleted from 4.41% and 30.70 ton/ha in forest to 1.89% and 15.55 ton/ha in pasture, respectively. The reduction ratios in some soil properties by changing land use type from forest to pasture were determined in the following order; OM (57.14%) > exch. K (55.88%) > SOC (49.35%) > EC (45.65%) > W (28.96%) > exch. Na (18.75%) > F (11.32%) > exch. Ca (4.07%). The values of OM and SOC stock had significant positive relations with F, W, EC, exch. K, and significant negative relations with Db, pH, exch. Mg. After deforestation, abandoning cultivated land to pasture had negative impact on the soil properties and depleted SOC stock in 0-15 cm soil layer. © 2021 Federation of Eurasian Soil Science Societies. All rights reserved.
Effects of Different Growing Media on Plant Growth and Nutrient Contents of Petunia (Petunia Hybrida)
(Pamukkale University, 2020) Gülser, F.; Çığ, A.; Gökkaya, T.H.; Atmaca, H.
The objective of this study was to investigate the effects of different growing media on plant growth and nutrient contents of petunia (Petunia hybrida). The experiment was conducted in a chamber room under controlled conditions at the laboratory. Seven different media (soil, 3:1 soil: peat (P1), 2:1 soil: peat (P2), 3:1 soil: barnyard manure (BYM1), 2:1 soil: barnyard manure (BYM2), 3:1 soil: sugar beet pulp (SBP1), 2:1 soil: sugar beet pulp (SBP2)) were used as plant growing media. The experiment was ended after three months following transplanting of seedlings. Plant growth and flower parameters and macro-micro nutrient contents were determined in harvested plants. The highest stem diameter, branch number, flower diameter, flower stalk diameter, plant fresh weight and plant dry weight were in 2:1 ratio of soil: peat mixture as 7.00 mm, 6.33, 8.91 cm, 3.59 mm, 48.47 g and 4.52 g while the highest plant lenght, lateral branch number and flower number means were found as 27.43 cm, 24.67 and 24.67 in ratio of 3:1 soil: peat growing media respectively. The highest potassium, magnesium and zinc means of plants were obtained as 6.6%, 2.2% and 32.50 mg kg-1 in soil: barnyard manure (2:1) growing media while the highest phosphorus and calcium means of plants were found as 0.27% and 4.5% in soil and peat growing media respectively. The highest iron and copper means of plants were determined as 231 mg kg-1 and 32.50 mg kg-1 in ratios of 2:1 and 3:1 of soil: sugarbeet pulp growing media respectively. © IJSM 2019.
Effects of Iron Sources and Doses on Plant Growth Criteria in Soybean Seedlings
(Federation of Eurasian Soil Science Societies, 2019) Gülser, F.; Yavuz, H.İ.; Gökkaya, T.H.; Sedef, M.
In this study, effects of different iron sources and doses on plant growth criteria in soybean (Glycine max L.) seedlings were investigated. The experiment was conducted according to factorial experimental design with three replications under controlled conditions. Atakişi variety of soybean (Glycine max L.) cultivar was used as a plant material. Three soybean seeds were sown each plastic pot having 1.3 kg soil:sand mixed in 1:1 ratio. Three different Fe sources (FeSO4.7H2O, Fe-EDDHA and nanoFe) were applied to the pots with three different doses (0-15-30 mg Fe kg-1). The experiment was ended after five weeks of seed sowing. Shoot length, shoot fresh and dry weights, root length, root fresh and dry weights and number of compound leaf in soybean seedlings were determined at the end of the experiment. The highest shoot fresh and dry weights, root fresh and dry weights, compound leaf number were determined in 15 mg kg-1 nano Fe applications as 3.56 g, 0.83 g, 2.30 g, 0.33 g and 5, respectively. Increasing the application dose of nano-Fe from 15 to 30 mg kg-1 caused to decrease in fresh and dry weights in soybean seedlings. Generally, shoot growth decreased and root length increased in soybean seedlings by increasing Fe application doses. Seedling growth in soybean generally increased depend on the Fe sources in the following order; FeSO4.7H2O < Fe-EDDHA < nano-Fe. © 2019 Federation of Eurasian Soil Science Societies. All rights reserved.
Relationships Between Soil Properties, Topography and Land Use in the Van Lake Basin, Turkey
(Federation of Eurasian Soil Science Societies, 2018) Karaca, S.; Gülser, F.; Selçuk, R.
The objective of this study was to determine the relationship between soil properties and different topography and land uses in the Van Lake Basin, Turkey. It has sharp and sheer slopes, and the big differences on altitude generally occur from the mountainous formations. Surface soil samples (0–20 cm) were taken from 40 different points with three different topography (backslope, footslope and terrace) and three different landuses (wheat, clover and pasture). Some of the studied soil properties (soil texture, electrical conductivity [EC], pH, lime content, organic matter content, macro and micro nutrients) changed in response to land use and topography. The clay, boron content, pH and EC values increased from the backslope to the terrace. Soil organic matter and EC values were lower in cultivated wheat and clover fields than in uncultivated pasture. The EC values had significant positive correlations with CaCO3, organic matter, K, B, Cu contents at 5% level and with Mg at 1% level statistically. The soil nutrient contents of cultivated wheat and clover fields were generally lower than the uncultivated pasture. The nutrient contents of soils in cultivated fields decreased due to nutrient uptake by crops. Soil texture, EC, pH, lime, organic matter and nutrient contents significantly varied in different topographic positions due to leaching, transporting and accumulation. © 2018 Federation of Eurasian Soil Science Societies. All rights reserved.