00511naa#a2200157#i#450# EN\\bibl\101683 20250906115256.6 2588-0209 20180325b2018####ek#y0engy0150####ca RU AGROLANDSCAPE TRANSFORMATION OF AGRICULTURAL LAND CHAA-KHOL DISTRICT OF THE TUVA REPUBLIC IN TERMS OF ALTITUDINAL ZONATION Journal article Moscow Electronic science 2018 0 с. Journal article local Khangaev A stolypinvestnik.ru