The effect of conventional and minimum tillage on physical properties of soil and on winter wheat grain yield
1991
Kovac, K. (Vyskumny Ustav Rastlinnej Vyroby, Piestany (CSFR))
In 3-year field trials on brown loess loamy soil, soil tillage effect (conventional, minimum, direct drilling) on soil physical properties and grain yields of winter wheat grown after maize for silage was studied. In given conditions (173 m altitude, total average precipitation 595 mm, average annual air temperature 9.6 degrees centigrade and winter sowing) the physical properties of soil were not significantly influenced. Higher soil moisture was in the experiments with minimum soil tillage and direct drilling. Greater differences in soil moisture occurred especially in the soil layer 0 - 0.10 m in the dry year. Volume weight reduced in direct drilling experiments did not exceed critical value 1.50 g.cm-3. All factors studied in this trial affected significantly winter wheat grain yield in the order: weather (year), soil tillage. The highest average yield of winter wheat was obtained after ploughing into the depth of 0.20 - 0.22 m (7.01 t.ha-1). In minimum tillage experiments, the yield was lower by 0.42 t.ha-1 (insignificantly) and after direct drilling by 1.05 t.ha-1 (significantly) in comparison with conventional ploughing.
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