MODELING OF THE SPRING WHEAT CULTIVAR PRODUCTIVITY CYCLES
The research results on modeling the dynamics of spring wheat productivity on the example of Novosibirsk 15 and Novosibirsk 29 soft cultivars are considered in the article. Similar results that have been received for such cultivar pairs as Altai 70 and Altai 99, Omsk 32 and Omsk 33 fit into the proposed polynomial-logarithmic model. Form similarity of the cultivar productivity design diagram and their difference on the coefficients and the relative deviation coefficient from the response surface give the grounds to believe that the phase of annual productivity variations is related to the natural and ecological conditions of the variety test plots and genetic characteristics of the researched cultivars.