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Faculty of Agriculture , University J.J. Strossmayer in Osijek. Trg Sv. Trojstva 3 , HR-31000 Osijek , Croatia. djug@pfos.hr. SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF WHEAT. Danijel JUG, Irena JUG, Vlado KOVACEVIC, Bojan STIPESEVIC, Jasna SOSTARIC. Introduction.
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Faculty of Agriculture, University J.J. Strossmayer in Osijek. Trg Sv. Trojstva 3, HR-31000 Osijek, Croatia. djug@pfos.hr. SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF WHEAT Danijel JUG, Irena JUG,Vlado KOVACEVIC, Bojan STIPESEVIC, Jasna SOSTARIC
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.
Material and methods • The Field experiment • cultivar :: w. wheatDEMETRA (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 :: N:P2O5:K2O= 121:130:130 kg ha-1
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-OESspectrometer (laboratory of the RISSAC. Budapest. Hungary)
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)
Influences of the soil tillage on nutritional status of winter wheat in four year average
Conclusion • reduction or absence of soil tillage under conditions of calcareous chernozem of Barannya province did not seriouslyaffect nutritional status of winter wheat • usual fertilization practice can be recommended for possible use of non-conventional soil tillage practice