%0 Journal Article %T ANALYSIS OF CROP ROTATION SYSTEMS ORGANIZATION OF AGRICULTURAL COMPANIES OF TYUKALINSKY DISTRICT OF OMSK REGION ON THE LANDSCAPE AND ENVIRONMENTAL BASIS %A Marakaeva, T.. %A Nozhenko , T.. %K agricultural organizations, suitability, crop rotation, landscape and environmental conditions, humus balance, efficiency index. %J Vestnik of Kazan State Agrarian University %D 2016 %N 11 %P 6 %I Kazan state agrarian University