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    PERIODICAL CHANGES OF SOME SOIL PROPERTIES OF A CALCAREOUS SOIL UNDER FIELD CONDITIONS AS AFFECTED BY DIFFERENT BIOCHAR APPLICATIONS
    (Natl Agricultural Research & Development Inst, 2021) Erdal, Ibrahim; Memici, Murat; Ekinci, Kamil; Sukusu, Enise
    In this study, the effects of the application of biochars derived from tomato harvest residues on some properties and nutrient concentrations of calcareous soils were investigated. Biochars produced at different pyrolysis temperatures (300, 500, and 700 degrees C) with the duration of 4 hours were applied to the depth of 15 cm at the rates of 30 t/ha to microplots established (50 cm x 50 cm) in field conditions. Soil samples were taken at four soil incubation periods and were analyzed for pH, cation exchange capacity (CEC), plant available and/or extractable K, Ca, Mg, P, Fe, Mn, Zn, and Cu. Mean values showed that soil pH significantly increased with the increasing incubation time and pyrolysis temperature. All other parameters examined in the study were significantly affected by the interaction of incubation time and pyrolysis temperature. Depending on the results, it can be concluded that the biochars produced at different temperatures and the soil incubation periods did not have a significant contribution on the exchangeable cations and the other nutrients of soil. Furthermore, it was observed that the biochar obtained at the pyrolysis temperature of 700 degrees C generally had a negative effect.
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    Öğe
    THE ROLE OF LIMING IN COPPER ADSORPTION OF ACIDIC SOILS
    (Carpathian Assoc Environment And Earth Sciences, 2024) Gokmen, Fatih; Sukusu, Enise; Simsek, Ugur; Uygur, Veli
    Investigate the impact of varying rates of liming on the availability and sorption properties of copper in a range of acid soils with differing physico-chemical futures. Soil samples with varying acidity levels were collected from different locations in the acidic Black Sea Region of Turkiye. Out of the nine soil samples collected, four were obtained from regions where hazelnuts are grown, while the other five were obtained from areas dedicated to tea growth. The sorption properties of soils limed at 0%, 50%, and 100% of lime requirement and incubated for 12 months, then the Langmuir and Freundlich adsorption isotherms were determined by batch sorption technique. The results showed that increasing the soil pH resulted in an increase in Cu adsorption. Experimental results of Cu adsorption were explained with high coefficients of determination (93.44-98.98%) of the Langmuir model. In the three experimental groups with full, half, and no lime application, pH increased significantly to 3.95, 4.46, and 5.89, respectively, while the maximum adsorption obtained from Langmuir adsorption curves, Qmax1 1553, Qmax2 2205, and Qmax3 3902 mg kg(-1), respectively. While the maximum adsorption in the tea plantation areas varied between 1491 and 1514 mg kg(-1), the maximum adsorption in hazelnut cultivation areas varied between 777 and 3333 mg kg(-1). These findings suggest that liming or other methods to increase soil pH could be effective soil management in reducing Cu mobility in acidic soils.