Effect of Minimising of Primary Tillage on Preharvest Plant Density and Yield of Spring Wheat
In long-term experiments on leached Chernozem the number of plants and productivity of spring wheat varieties Novosibirsk 29 decreased with increasing period following fallow in crop rotation. Under intensive farming an average number of wheat plants on fallow reached 444 plants/m2, second wheat crop – 434 plants/m2 and last wheat crop – 424 plant/m2 or 102, 108, and 110% in comparison with the control. Grain yield reached 3.96, 3.61, 3.08 t/ha or 138, 210 and 250% respectively in comparison with the control. The studied methods of soil treatment for fallowing had no effect upon the number of plants per unit area and yield of spring wheat on fallow. Significant effect of the studied methods of soil cultivation was demonstrated on the number and productivity of plants under extensive farming in crops after wheat. Under intensive farming such differences were not obtained.