Time renewal of spring vegetation plays a significant role in overwintering plants because it is an integral indicator light, thermal and hydrothermal conditions of these plants in the period from spring awakening to the generative phase. The development of plants depends not of the calendar date TRSV but solar radiation pressure of high or low sun in the day of the growing season. As TRSV changes over the years in a wide range (in winter wheat in Poltava from 05.02.2001 to 20.04.2003), so the height of the sun at apogee varies for plants the same way producing very different energy, light and photoperiodic conditions of spring development for crops. Therefore, in practice, should proceed from the fact that TRSV doesn’t predict but determines, specifies, program the parameters of light, thermal and hydrothermal conditions for spring development of overwintering plants thus turn to us from uncontrollable and unpredictable to known in advance, regardless of the weather the more TRSV deviates from the norm this year.

This conclusion is the fundamental basis for the development of new agroecological directions in the management of ontogenesis, protection and selection mainly of winter crops. In the management of plant ontogenesis its importance lies in the fact that through this understanding, people obtain the power to control not only the earth (moisture, supply), but also space (light, heat) living conditions of overwintering plants and on this basis to create innovative nextgeneration technology, methods not theoretical, but reliable practical programming productivity and product quality, it is impossible for the previous level of biological and ecological knowledge. A number of technologies already established in Ukraine, Russia, Germany, Czech Republic and they operate in the world.