Effects of crop rotation on weed infestation in maize crops.

Effects of the crop rotation, as a cropping system on arable areas, were studied on weed infestation in maize crops. Maize as a dominant crop in the sowing structure is most often grown in two cropping systems: maize continuous cropping and the two crops rotation. Soybean as a crop is sown on significantly smaller areas, hence it is an important crop to be used in the future organisation of the contemporary crop rotations. Considering all these facts, it is decided to organise permanent crop rotations in Radmilovac, the experimental model farm of the Faculty of Agriculture in Belgrade-Zemun. The trials with crop rotations with various crops were set up in 1992 and they are still performed. The crop rotation, as a cropping practice, is a complex category with broad effects on the soil and crops. The present study presents results on effects of different cropping systems (crop rotation and continuous cropping) on a weed synusia in maize crops during the two years of investigation (2009 and 2010). According to obtained results, all crop rotations, from two-crop to six-crop rotation, were a more efficient system for weed suppression than maize continuous cropping.