The research on studying of influence of growth such as Epin, Immunotsitofit and Zir-con on crop productivity and grain quality of winter rye has been conducted. It is re-vealed that processing of winter rye by growth stimulants Epin significantly increases crop productivity and improves quality of grain. Productivity of sowings of agricultural crops depends on size and duration of the functioning of a photosynthetic apparatus of plants. Photosynthetic potential of sowing is closely correlated both with biological and economic productivity of plants. Researches have shown that processing of winter rye crops by growth stimulator Epin significantly increases the heavity and improves grain quality.

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