The dynamics of spring wheat yield and quality during proloNged use of plowland
Carried out researches revealed that the leached black soils are characterized by favorable physical and chemical properties such as reaction of sub-acidic soil, a relatively high amount of absorbed bases, high content of mobile potassium and phosphorus. In dry and very dry years (SCC 0,5-0,9) grain yield was 2,51 t/ha, in ordinary years (SCC 1-1.3 – 3.06), in the wettest years (SCC greater than 1,4) – 2,46 t/ha. The greatest influence on the grain yield had the weather of the third ten-day period of May, and the grain quality of second and third week of July.