TY JOUR TI INCREASING THE EFFICIENCY OF WIDE-CAPACITY IRRIGATION MACHINES THROUGH THE USE OF SEMI-STATIONARY SYSTEMS KW irrigation KW sprinkling KW wide-span sprinkler machines KW land use coefficient KW parameter adaptation KW hydraulic justification KW head loss KW irrigation technologies KW sprinklers JO INTERNATIONAL AGRICULTURAL JOURNAL AU Ryazantsev, A.I. AU Travkin, V.S. AU Evseev, E.Y. AU Travkina, A.R. PY 2025 IS 8 PB Electronic science