engleski

Reduced soil tillage systems for crop rotations improving nutritional value of grain crops

The trial for winter wheat (Tritictum aestivum L.) or spring barley (Hordeum vulgaris L.) in rotation with maize (Zea mais L.) on lessive- pseudogley in semiarid to semihumid climate of Eastern Croatia was set up during years 1996- 1999 with five soil tillage systems: PL) Conventional tillage based on ploughing ; PD) Conventional tillage after diskharrowing for previous crop in preceding season ; DP) Diskharrowing after conventional tillage for previous crop in preceding season ; DD) Continuous diskharrowing, and CD) Chiselling and diskharrowing. During first and second season (1996/97 and 1997/98), recorded winter wheat grain yields were not different, with PL having the highest and DD the lowest yield. Maize showed next differences in first season: PL=PD > CH=DD=DP, and in second season PD=PL=DP=CH > DD. In 1999, spring barley replaced winter wheat, and yields were: PL > DP > PD > CD > DD. Maize yields recorded were: PL > PD > DP > CH > DD. The grain yield results, together with hectoliter mass and mass of 1000 grains, supported that PL can be replaced with other tillage systems for winter wheat and spring barley, whereas continuous diskharrowing may have substantially lower yields for maize during unfavourable years.

disk tillage ; wheat ; yield ; corn

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