The paper provides for results of the three-year research of the impact of soil and climatic conditions on the yield of meadow grass and its mixtures. The objective of the research was to determine the impact of meadows’ sprinkling on the botanical composition of meadow green plants, structure and yield of white and pink clover and grass mixtures with its participation in conditions of north and east region of Belorussia. It was found out that sprinkling is favourable for preservation of valuable grass cultivars in mixtures, in particular legume plants. The composition of mixtures and irrigation considerably influence the yield. Average yield of grass mixtures on the non-irrigated field for the period of three years was 7.68-11.58 t·ha-1. Whereas, sprinkling influenced the growth of the meadow yield by 0.67-2.60 t·ha-1 in relation to the investigated variant. The highest yield was reported in variants of grass mixtures of white and pink clover with tall fescue and reed canary grass.