Biochar made from chicken manure - a fertilizer that can ensure the carbon neutrality of agricultural soils in conditions of elevated temperaturesPolina Kuryntseva, Gulnaz Galieva, Yuliya Pavlova, Polina Galitskaya and Svetlana SelivanovskayaE3S Web of Conf., 463 (2023) 01013DOI: https://doi.org/10.1051/e3sconf/202346301013