Technology of landscaping in arid zones by using biohumus from sheep wool Alibek Ydyrys, Birlikbay Yeszhanov, Nurlan Baymurzaev, Sayat Sharakhmetov, Askar Mautenbaev, Bekzat Tynybekov and Tilek Baidaulet E3S Web Conf., 169 (2020) 02012 Published online: 19 May 2020 DOI: 10.1051/e3sconf/202016902012