PRODUCTIVITY OF SPRING DURUM WHEAT VARIETIES UNDER DIFFERENT TILLAGE TECHNOLOGIES IN THE STEPPE PART OF ORENBURG PRE-URALS

The article gives the data about the productivity of 5 varieties of spring durum wheat varieties under different tillage technologies, such as plowing, subsoil plowing and basic tillage. The probability of their productivity of different levels has been estimated. The varietal features cultivated with different tillage technologies have been determined. It has been established that sowing of durum wheat in lands, lying fallow reduces its productivity on 0,229 t/ha compared with a plowing and on 0,172 t/ha compared with subsoil plowing. The varieties ‘Bezenchukskaya 205’ and ‘Pamyati Chekhovicha’ are the most productive in the steppe part of Orenburg Pre-Urals. They are responsive to the improvement of sowing conditions, e.g. sowing after plowing and subsoil plowing) and stable in productivity under the worsening of the sowing conditions, e.g. sowing in stubble. These varieties can be considered as donors of high productivity in the breeding process. If we sow the most productive varieties of durum wheat after plowing in autumn, we can get productivity of 1,5-2,3 t/ha in the years with favorable climatic conditions