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Biochar is produced by pyrolysis of organic matter such as crop residues and organic fertilizer fractions. Biochar has a very high carbon content combined with low hydrogen and oxygen content, which makes it very difficult to degrade. When biochar is applied to soil, carbon is sequestered in the soil for many decades, which reduces the atmospheric concentration of CO2.

At the same time, biochar has a favorable effect on soil quality, a.o. soil structure, pH, WHC, phosphate, and provide a surface for microbial growth. In our research, we investigate the benefits and possible ecotoxicological effects on soil microbial communities and other organisms of carbon sequestration in soil using biochar.