TY JOUR TI THE CLUSTER ANALYSIS OF GRADES OF THE SOFT SPRING-SOWN WHEAT ON ELEMENTS OF THE CROP STRUCTURE IN THE SOUTHERN FOREST-STEPPE OF WESTERN SIBERIA KW cluster analysis KW grades KW soft spring-sown wheat KW southern forest-steppe KW dendrogram JO Bulletin of KSAU AU Shamanin, V.P. AU Petukhovsky, S.L. AU Krasnova, Y.S. PY 2016 IS PB Krasnoyarsk State Agrarian University