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    Effects of tomato harvest residue derived biochars obtained from different pyrolysis temperature on periodical available nutrient concentrations of soils
    (2019) Erdal, İbrahim; Memici, Murat; Ekinci, Kamil; Sukuşu, Enise
    The aim of this study was to investigate the effects of biochars obtained by pyrolysis of thetomato harvest residues at different temperatures on some available nutrient concentrations ofsoil. For this purpose, biochars were obtained by pyrolysis of the tomato harvest residues at500 and 700° C for 80 minutes. The biochars were applied to the parcels prepared in 50x50 cmdimensions under field conditions to 3 tons per decare and they were left to stand in naturalconditions. 2 months after the application, soil samples were taken in 4 periods at one-monthintervals. In these examples, plant available and/or extractable nutrients were determined.According to the results, it was observed that biochar applications did not affect the nutrientconcentrations of the soil and had a negative effect on some nutrients. The pyrolysistemperatures had no effect on the efficiency of biochar on soil nutrient concentration.
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    Periodical changes of some soil properties of a calcareous soil under field conditions as affected by different biochar applications
    (National Agricultural Research and Development Institute, 2021) Erdal, İbrahim; Memici, Murat; Ekinci, Kamil; Sukuşu, 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°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°C generally had a negative effect. © 2021, National Agricultural Research and Development Institute. All rights reserved.
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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.