Andrejchenko L. Perfection of growing technology elements of sping wheat in conditions of Southezn Steppe of Ukraine.

Object of researches - spring hard and soft wheat. Growing and development of plants, forming of structure elements of harvest grain cultures, its quality. Purposes of researches were a development and improvement of growing technology elements of high harvest qualitative spring wheat grain for dry conditions southern Steppe Ukraine. Methods of researches: the field; the phonological observation and biometric measurements; laboratory; the mathematician-statistical; accounting-comparative. Results of researches: 1. for theory - are determined optimum sowing intervals and sowing rates for sorts hard and soft spring wheat. Motivated advantage of spring soft wheat on spring barley as topsoil culture in sow with sainfoin. Revealed sorts with high reaction on mineral fertilizers. Designed mathematical models of forecasting of harvest increase of spring wheat is from fertilizers. Determined potential harvest level of sorts, which recommended for steepe zone in 44-49 tc/ga. 2. for practice - an optimization of growing technology elements allows to reach parameters to productivities of spring wheat at a rate of 26-29 tc/ga soft and 28-32 tc/ga durum with reception before 1384 grn./ga clean profit. Sphere of the use: agricultural enterprises of zone Steppe with corn direction of specialization.