SOIL TILLAGE IMPACTS ON NUTRITIONAL

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Faculty of Agriculture, University J.J.
Strossmayer in Osijek. Trg Sv. Trojstva 3,
HR-31000 Osijek, Croatia. djug_at_pfos.hr.
SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF
WHEAT
Danijel JUG, Irena JUG, Vlado KOVACEVIC, Bojan
STIPESEVIC, Jasna SOSTARIC
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Introduction

• Object of this study was testing nutritional
  status of winter wheat under different soil
  tillage with aim of possible new recommendation
  for fertilization under reduction/absence of soil
  tillage.

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Material and methods

• The Field experiment

• cultivar w. wheat DEMETRA (in rotation with
  soybean)
• location eastern Croatia experimental site
  near Kneževo
• experimental period 2002-2005
• soil tillage treatments CT conventional
  tillage
• DH diskharrowing
• NT no-tillage
• Basic experimental plot 900 m-2
• fertilization NP2O5K2O 121130130 kg ha-1

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• Conventional tillage - in autumn

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• Diskharrowing - in autumn

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• No-tillage early season

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• sowing in October
• John Deere 750A
• interrow spacing 16.5 cm
• planned density 700 plants m-2
• deep of sowing 2-3 cm
• plant protection uniformly for each tillage
  treatments

• Sampling and chemical analysis

• sampling w. wheat Feekes 10.5
• (Emergence of inflorescence completed)
• samples microwave digestion
• (65 HNO3 30 H2O2)
• analyses 23 elements with a Jobin-Yvon
  Ultrace 238 ICP-OES spectrometer (laboratory of
  the RISSAC. Budapest. Hungary)

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• Soil characteristics

• calcareous chernozem on loess substrate
• chemical properties
• pH (H2O) - 8.1
• pH (KCl) - 7.5
• Humus - 2.6
• CaCO3 - 2.1
• P2O5 - 18.7 mg 100 g-1 tla (AL-soluble)
• K2O - 28.4 mg 100 g-1 tla (AL-soluble)

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Weather characteristic
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Results
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Impact of the year on nutritional status of
winter wheat
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Influences of the soil tillage on nutritional
status of winter wheat in four year average
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Conclusion

• reduction or absence of soil tillage under
  conditions of calcareous chernozem of Barannya
  province did not seriously affect nutritional
  status of winter wheat
• usual fertilization practice can be recommended
  for possible use of non-conventional soil tillage
  practice

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Thank you for your attention