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Michaela Hrabalíková & Petra Huislová hrabalikova.michaela@vumop.cz & huislova.petra@vumop.cz

Assessment of changes in topsoil depth redistribution in relation to different tillage technologies. Michaela Hrabalíková & Petra Huislová hrabalikova.michaela@vumop.cz & huislova.petra@vumop.cz. Research Institute for Soil and Water Conservation

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Michaela Hrabalíková & Petra Huislová hrabalikova.michaela@vumop.cz & huislova.petra@vumop.cz

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  1. Assessmentof changes intopsoil depth redistributioninrelation todifferent tillagetechnologies Michaela Hrabalíková & Petra Huislová hrabalikova.michaela@vumop.cz & huislova.petra@vumop.cz Research Institute for Soil and Water Conservation Žabovřeská 250, 156 27 Prague 5 – Zbraslav, Czech Republic

  2. Introduction and objectives of our study • provide comparison between a conventional and conservational primary tillage implement. Variability of mechanism of soil profile modification by tillage along the slope, modified figure of De Alba et al., 2004& Zadorova et al., 2015 OBJECTIVES: • evaluate effects of soil redistribution on the spatial variability of soil profiles before and after five-tillage operation by using three different practices

  3. Study Area View from the experimental plot upward View on part of the experimental plot

  4. Experiment design Tillage direction BS SU BS + SH TS+ FS SH TS + FS SH SU BS

  5. Experiment design • During the year 2015 • Simulation of medium-term effect (5 yearsapprox. 5-tillage pass) • Tools: • Mouldboard plough • Chisel plough • Disc harrow d=250 mm, v=7-10 km/h d=250 mm, v=12-14 km/h d=105 mm, v=10-12 km/h • mouldboard plough • chisel plough • disc harrow

  6. Results BS SU BS + SH TS+ FS SH BS TS + FS SH SU

  7. C M M C D C D D M REsults

  8. Results In total: • Discharrow: 29.2 m3=> 29 tons • Chisel plough: 44.5 m3=> 59 tons • Mouldboard plough: 75m3=> 102 tons

  9. Discussion and Conclusion • First study related to tillage erosion and soil formation by tillage in the Czech Republic where the tillage erosion was neglected • Chisel and disc plough cause less soil translocation than does the mouldboard plough • The shallow tillage (<20cm depth) and up-slope tillage are recommended practice to reduce tillage erosion • Various agro-zones and soil types require further research focused on impact of tillage practices on soil formation • The critical threshold for soil loss by tillage erosion is not exactly defined asit is determined for water erosion

  10. Thank you for your attention. Resultswere obtained as part of projects supported by the Ministry of Agriculture of the Czech Republic „Assessing and modelling tillage and gully erosion under the framework of the total soil loss evaluation of the intensively farmed land” (Project No. QJ1520028); and “Optimization in exploitation of agricultural soil to support water infiltration and retention with impacts to prediction of drought and floods in conditions of Czech Republic” (Project No. QJ1520026)

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