Justification and calculation of design features of drum-type hydroponics A.A. Sadov, A.D. Ustyugov, I.L. Chukin, K.M. Potetnya and M.V. Kholmanskikh E3S Web Conf., 282 (2021) 07014 Published online: 05 July 2021 DOI: 10.1051/e3sconf/202128207014