The impact of biochar dosing with simultaneous fertilization with a biogas plant digestate on the volumetric density of soil

The paper analyses the impact of biochar on the volumetric density of the soil, with simultaneous fertilization with an agricultural biogas plant digestate. For the purpose of the research, 10 experimental fields were prepared for the study, in accordance with good agricultural practice. To verify the results, a single-factor variance analysis was performed, which demonstrated a significant differentiation between the dosing of the biochar and the values of the volumetric density of the soil. Using the digestate simultaneously with the biochar addition further increased the disparity in the soil’s volumetric density between the respective biochar doses.