00671naa#a2200157#i#450# EN\FNC «VIK IM. V. R. VIL'YAMSA»\bibl\6788 20250316004618.7 20211224b2021####ek#y0engy0150####ca RU EFFICIENCY OF ANTHROPOGENIC ENERGY COSTS IN THE CREATION AND LONG-TERM USE OF DIFFERENT-RIPENING CEREAL HAYFIELDS Conference article/thesis Lobnya Federal Williams Research Center of Forage Production and Agroecology 2021 5 с. Conference article/thesis local Полеводство. Полевые культуры. 633 Zhezmer Natalya Vasilievna adaptagro.editorum.ru