Sustainable agriculture and protection of the environment Ewa Siemianowska, Andrzej Wesołowski, Krystyna A. Skibniewska, Józef Tyburski and Marcin Gurzyński E3S Web Conf., 19 (2017) 02022 Published online: 23 October 2017 DOI: 10.1051/e3sconf/20171902022