A single-factor field experiment was conducted in 2009-2011 on light soil to determine productivity of multi-species mixtures of barley, oat, wheat and triticale. The cereals were grown in 3and 4-species mixtures. The objective of this study was to determine if these highly diverse cereal mixtures are more productive and yield more stable than pure stand cereals. Mixtures did not differ in grain yield and each of them yielded between the highest and the lowest yielding component grown in pure stand. All mixtures yielded more stable than pure stands of barley, oat and triticale. Oat-wheattriticale mixture yielded more grain protein than pure stand cereals and mixtures with the exception of barley-wheat-triticale mixture. Growing cereals in mixtures caused reduction in productive tillering of barley and 1000-grain weight of oat, while increased number of grains and grain weight per spike of triticale.

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