Irrigation systems of the North-Kazakhstan region during the development of virgin and fallow lands (1970s)Zauresh Nagaibayeva, Jamilya Amantayeva, Zhanna Mazhitova, Zinakul Bissembayeva and Dauren NessipkaliyevE3S Web Conf., 371 (2023) 06016DOI: https://doi.org/10.1051/e3sconf/202337106016