Mini-Rotoknife
A multi-purpose linear disc-aerator, which can be powered by a compact tractor or utility vehicle, with a minimum power unit of 25 h.p., and can be either towed or mounted depending upon the model. It has an operating width of 1.5m and consists of three disc rotors as follows: A disc rotor with 15 discs for shallow slitting to 50mm depth at 100mm spacing, another with 14 discs which can be lowered to reduce the spacing of the slits to 50mm (a total of 29 mini discs with a diameter of 200mm each), and a third rotor with 5 discs (300mm diameter each) for a slitting depth of up to 100mm at a spacing of 300mm. It is manufactured by Imants.