Seeds of some oilplants cultivated in Mongolia (rapeseed, sunflower, s
oya and mustard) were investigated for oil content and fatty acid comp
osition in dependence of their varieties and cultivation regions. Seed
s of given oilplant varieties have nearly same fatty acid composition,
but they differ in their oil content. The rapeseed oils do not contai
n erucic acid, but the seed oil of mustard contained 15.5% eicosenoic
acid.