INFLUENCE OF SOIL TILLAGE AND WEED SUPPRESSION ONWINTER WHEAT YIELD

Modern soil tillage systems based on different tools thanmouldboard plough have very often stronger weed occurrence, which can be aserious problem for achieving high yields. An obvious solution forweed suppression is a herbicide, whose improper use can deteriorate environmentand lead toward serious ecological problems. In order to investigate theinteraction between soil tillage and herbicide, trial was set up in Valpovo inseasons 2008/09 - 2010/11. Two soil tillage systems (CT-conventional tillage,based on mouldboard ploughing, and CH-chiselling and disk harrowing, withoutploughing) and five herbicide treatments (NH-control, no herbicides; H10-recommended dose of Herbaflex (2 l ha^-1); H05-half dose of Herbaflex; F10-recommended dose of Fox (1.5 l ha^-1); and F05-half dose of Fox) were applied towinter wheat crops. Results showed similar effects of soil tillage on the winterwheat yield, whereas different herbicide dosages showed similar weed suppressionand influence on winter wheat yield.