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    Determination of Physical and Chemical Properties of the Soils Under Different Land Managements
    (Asian Journal Of Chemistry, 2010) Durak, A.; Buyukguner, E.; Dogan, H. M.
    This study aimed to determine the effects of different land management systems on the physical and chemical properties of soil. The study was conducted on a cultivated land, forest land and orchard adjacent to each other on the same topographic position at Tokat Rural Research Institute. With this aim, 10 soil samples were taken randomly from 0-30 and 30-60 cm depths of each land management area. The physical (field capacity, wilting point water content, soil texture, hydraulic conductivity, bulk density) and chemical (organic matter, CaCO3 content, pH, EC, cation exchange capacity, nitrogen, phosphorus, exchangeable sodium, potassium, calcium, magnesium) properties of the soil samples were examined and the spatial variability of the soil properties were mapped by using geographic information systems (GIS). The statistical evaluation indicated that all topsoil (0-30 cm) properties except phosphorus, silt and exchangeable sodium showed statistically significant differences (p < 0.05) at three land management systems. Whereas, all subsoil (30-60 cm) properties but silt, exchangeable sodium and hydraulic conductivity revaled statistically significant differences (p < 0.05) at three land management systems. The study concluded that the properties of soil change through land management and they should be done based on the physical and chemical properties of the lands following their classification for soil quality and environmental protection.
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    The effects of liquid vermicompost applications on yield and some plant growth characteristics of onions
    (Int Soc Horticultural Science, 2019) Altuntas, O.; Kucuk, R.; Durak, A.; Kutsal, I. K.
    This study was conducted in order to determine the effects of liquid vermicompost applications on yield, quality and plant growth in onions grown during the 2017 vegetation period under open field conditions in the cultivation area of the Agriculture Department of the Turgut Ozal University Horticulture Faculty. Control plants were fertilized with conventional fertilizers while other plants were treated by applying only liquid vermicompost in 3 doses: (200, 400 and 600 L ha(-1)). The vermicompost treatments were performed a total of 5 times at 20-day intervals. Chemical fertilizer was applied twice during experiment. The full dose of P and half dose of N fertilizer were applied at transplanting and the remaining half dose of N was side-dressed 30 days after transplanting. The treatments were repeated three times in randomized plots. Harvested bulbs were examined for total yield (kg m(-2)), plant height (cm), bulb length and diameter (mm), skin flesh thickness (mm), bulb diameter (mm), single bulb weight (g), pH, total soluble solids (%), titrable acidity and color values. Liquid vermicompost treatments significantly affected the total soluble solids; L, a and b color values; pH and total yield. The highest average yield (1,321 kg m(-1)), average bulb weight (121,86 g bulb(-1)), bulb diameter (67.45 mm) and color value (15,16) were obtained from plants treated with 400 L ha(-1) of liquid vermicompost, while the highest total soluble solids (16%) and an L color value of 49.26 was obtained from plants treated with 600 L ha(-1).
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    OPTIMIZATION AND COMPARISON OF THE EFFECTS OF VERMICOMPOST AND CONVENTIONAL FERTILIZATION ON SPINACH (SPINACIA OLERACEA L.) GROWTH
    (Corvinus Univ Budapest, 2018) Altuntas, O.; Durak, A.; Kucuk, R.
    Vermicompost helps soil to retain water, regulate soil temperature and structure, and helps solve the soil's nutrient problem. The aim of our study was to compare chemical fertilization with different rates of vermicompost treatments in terms of growth properties, yield, and nutrient element content of spinach (Spinacia oleracea L.). We also determined the appropriate rate of vermicompost application for spinach The experiment was repeated in two successive seasons with five treatments in the experiment: (1) control, (2) 1 ton vermicompost/ha, (3) 2 tons vermicompost/ha, (4) 3 tons vermicompost/ha, and (5) chemical fertilization. To assess the effect of the treatments in spinach, soil analysis (soil texture, pH, EC (Electrical Conductivity), percent of calcium carbonate, organic matter, and macro and micro elements), plant height and yield of spinach plants, and plant nutrient element analysis of spinach leaves were performed. Evaluation of the results indicated that vermicompost had positive impacts on the soil and the plant; the best treatment rate was 3 t/ha. This vermicompost application rate resulted in a 149% yield increase compared with the chemical fertilizer treatment.