TY JOUR TI DEVELOPMENT OF OFF-SEASON AGRICULTURAL TECHNOLOGIES FOR ENERGY SAVING IN THE OPERATION OF MULTI-SUPPORT WIDE-AREA SPRINKLER EQUIPMENT KW melioration KW circular sprinklers KW "Frigate" KW "Kuban-LK1" KW soil deformation KW bearing capacity of the soil KW specific pressure KW freeze-thaw cycles KW off-season preparation KW leveling device KW hardening of the surface of movement JO INTERNATIONAL AGRICULTURAL JOURNAL AU Ryazantsev, A.I. AU Smirnov, A.I. AU Evseev, E.Y. AU Mal'ko, I.V. AU Zubkov, F.V. AU Artyushin, S.A. PY 2026 IS 9 PB Electronic science