The impact of soil tillage minimization on sandy loam soil / | Žemės dirbimo mažinimo įtaka lengvo priemolio dirvai.
2006
Auškalnis, Albinas, | Feiza, Virginijus,
The influence of different soil preparation and sowing technologies on soil physical properties and grain yield of winter wheat, spring barley and spring wheat was studied in the stationary field experiments conducted at the Lithuanian Institute of Agriculture during 2003-2006. The Endocalcari-Endohypogleyic Cambisol sandy loam soil was prepared for winter and spring cereals in different ways: 1) stubble cultivation to 10-12 cm depth, mouldboard ploughing to 21-23 cm depth and tillage with a precision seedbed cultivator to 3-4 cm; 2) stubble cultivation to 10-12 cm and tillage with a precision seedbed cultivator to 3-4 cm; 3) stubble cultivation to 10-12 cm; treatments 4 and 5 no tillage before drilling. In treatments 1 and 2 cereals were sown by a disc drill ‘Saxonia’, in treatments 3 and 4 by a sowing unit DS-3, and a sowing unit ‘Amazone’ in treatment 5. Soil moisture was found to be lower at 0-5 cm depth in the treatment, where ploughing and tillage by a precision seedbed cultivator had been done. Soil bulk density increased and air-filled porosity decreased at 0-5 cm depth, when cereals had been sown by a direct, disc-coulter drill DS-3 without pres-sowing tillage. Soil total and air-filled porosity varied from 45.7 to 56.4 and from 21.1 to 42.5 %, respectively. Different soil tillage and sowing methods did not have any significant effect on soil bulk density, total and air-filled porosity at 10-20 cm depth soil layer. The most stable cereal grain yield was obtained in the treatment where stubble cultivation and ploughing had been applied.
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