00550naa#a2200157#i#450# EN\URAL'SKIY GOSUDARSTVENNYY AGRARNYY UNIVERSITET\bibl\47385 20240517110420.5 1997-4868 20211126b2021####ek#y0engy0150####ca RU Trends in crop production as a factor of ensuring food security of the Perm Region Journal article Ekaterinburg Ural State Agrarian University 2021 11 с. Journal article local Shalaeva Lyudmila Vasil'evna usau.editorum.ru