Grain flattening and conservation of formula forage is a relatively new and promising method of feeds production. This method achieves an improvement of starch availability which loses its initial structure and is easily exposed to amylase. Whole soybeans seeds are indigestible for the most part. Total energy content of a feed and its digestibility are increased when ensiling flattened soybeans with corn tops. Feeding whole seeds in bulk causes a rise in expenditures. Consideration is given to the technology of joint ensiling of flattened soybeans with corn tops with the goal to provide feeding silage with digestible protein up to values no less than zootechnical rates set for high-intensity livestock enterprises. The following soybean varieties were chosen as an object of the study: indeterminate – Okskaya, semi-determinate – Svetlaya, and determinate – Mageva. Varieties become ripen at the 56° latitude provided that the sum of the effective daily temperatures is 1600…1800°C [1]. Corn component is a corn hybrid PR 39Bx29 belonging to first earlier maturity group with value of 100 units according to FAO that becomes ripen in 90…100 days with the sum of the effective daily temperatures equal to 2200°C. Field experiments were conducted in 2009…2012 in the cereals and row crops rotation on the experimental plot of the OAO “Agrofirma Dmitrova Gora” in the Konakovsky District of Tver Oblast. It is shown that such method raised the energy content of the feed and ensured high economic performance provided that corn and soybean production technologies and technological effectiveness of silage establishment and storage are complied with, silage components are selected correctly.