The goal of my study is to propose an improved method for reclaiming cobalt (Co) contamination in agricultural lands using canola (Brassica napus L.). Cobalt (100 mg/kg) in the form of CoSO4 was given to each parcel. Afterward ethylenediaminetetraacetic acid (EDTA) chelate was given to every single parcel in four doses (0 mmol/kg, 5 mmol/kg, 10 mmol/kg, and 15 mmol/kg) in the course of the spadix period of the plants. The plants were harvested four months after sowing. Although the quantities of available Fe, Mn, and Cu of the experimental area soil sample were adequate, the available Zn quantity was determined to be inadequate. The texture of research area soil was clay (C). In respect to the field experiment results, increasing EDTA doses had a negative affect on roots and shoots of canola plants. Furthermore, cobalt concentrations in underground parts and aboveground plant parts increased with increasing EDTA applications. These results were found to be statistically significant at the level of 1%. Consequently, cobalt heavy metal contaminants of Tekirdağ country soils could be improved by the phytoremediation method as shown in this research.
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