Ivaniv M. Agroecological estimation of corn hybrids of different ripeness groups under the conditions of the South Steppe

The object of researches is Changeability of economic-important signs of new hybrids of corn at the test of them in different soil-ecological points of South Steppe. The purpose of researches is the Theoretical ground and practical determination of optimum type of hybrid of corn for the agro economic terms of South Steppe. Methods of researches - visual; measuring-gravimetric; statistical; computation-comparative. Results of researches: 1. For a theory - First in the conditions of south area of Steppe of Ukraine the conducted researches directed on complex estimation of new hybrids of corn of different groups of ripeness (FAO 190-600) at growing of them in different soil-ecological points of South Steppe at modern economic terms. 2. For practice - On the basis of researches, that are conducted in the conditions of south of Ukraine, the got are given about forming of productivity of plants of hybrids of corn of different groups of ripeness, which have the important practical value for the producers of commodity corn. The hybrids of corn are definite, that the promoted adaptive capacity is had for the terms of irrigation of South Steppe. Hybrid composition of corn with the purpose of grant of recommendations to production is optimized, in relation to the use of definite type to the hybrid for the receipt of maximal economic efficiency. The sphere of the use is the agricultural enterprises of south of Ukraine.