The effect of growth retardant (Bercema CCC), cereal components (wheat vs. tríncale), legume components (peas vs. field peas vs. vetch) and their percentage (0 vs. 15 vs. 30) in cereal-grain mixtures on their yield and its structure were studied in the years 1990-1992. It was found that the botanical composition of the mixtures had no effect on their yield nor on the yield of cereals. However, the yield of legume plants was significantly affected. The legume plants grown with triticale gave 15% higher yields as compared with those grown with wheat. The yield of mixtures was determined by the percentage of a legume component: the higher percentage of a legume plant, the lower yield of a mixture. Bercema CCC shortened cereal internods, on average, by 14.6 cm. The effect of the retardant was most apparent when applied on cerclas grown as monocultures. This effect was least pronounced when the retardant was applied on wheat grown with legume components contributing 30% to a cereal-legume mixture.
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