Mowers are mainly divided into blade mowers , drum mowers and disc mowers . Blade mowers are preferred mainly due to the fact that they can work on uneven sloping terrain. Rotary or drum mowers are suitable for mowing lawns in orchards, vineyards, sports grounds and others. The main advantage of disc mowers is the ability to work at higher speeds, which significantly increases productivity and the ability to change the width of the slope. They can be equipped with a thumb or rubber conditioner , which significantly reduces the time for drying and harvesting.