Research on methods, techniques and technologies of carbon sequestration in soil Oana Diana Cristea, Valentin Vlăduţ, Nicoleta Ungureanu, Diana Lorena Popa, Simona Isticioaia, Liliana Dumitrescu, Gheorghe Matei and Livia Apostol E3S Web Conf., 180 (2020) 03021 Published online: 24 July 2020 DOI: 10.1051/e3sconf/202018003021