Abstract
Seven associations of segetal vegetation are distinguished for the vast arable lands of Central Yakutia. Low species richness and the prevalence of annual weeds are the main features of these communities. Only two dominant speciesSphallerocarpus gracilis andSaussurea amara represent Asian types of areals. Other dominantsFallopia convolvulus, Elytrigia repens, Chenopodium album, Brassica campestris, Lappula squarrosa, Scutellaria galericulata, Thlaspi arvense, Avena fatua andCrepis tectorum are typically cosmopolitan. The phytosociological system of the segetal communities is described.
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