The effect of forecrop, soil tillage and fertilization on the level and structure of yield and efficiency of winter wheat growing
1998
Kovac, K. (Vyskumny Ustav Rastlinnej Vyroby, Piestany (Slovak Republic))
Winter wheat, the Viginta variety at limited inputs of soil tillage (C1 control, conventional; C2 protective soil tillage) and fertilization (B1 control, 0 NPK or in A2 after spring barley manure 40 t/ha; B2 reduced fertilization, N according to anorganic N in soil; B3 medium intensity of NPK) in two six-plot crop rotations was cultivated. It was affected statistically significantly by weather, in arid conditions of summer and autumn of 1991/1992 as well as soil cultivation (highly significantly). Other factors, such as a forecrop and nutrition had no more significant effect. Average yield of winter wheat after spring barley was 7.31 t/ha, after lucerne 7.52 t/ha, after pea 6.81 t/ha and for the six-year period 7.12 t/ha. The yield in treatments of soil tillage was practically identical. In treatments of fertilization the yield was increasing with intensity of fertilization by fertilizers. The difference in yield between the control (treatment B1) and conventional fertilization at medium intensity of fertilization (treatment B3) was 7%. Greater year stability of grain yield was recorded in protective soil tillage and in the treatment when fertilizers were not applied compared with conventional soil tillage and mineral fertilization.
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