Potato cultivators/ridgers
The PTO-driven cultivator/ridger with trapezoid-shaped ridge heads (RC) used is shown in Figure 1a and the drawn cultivators/ridgers with spring tines on a parallelogram framework with wing ridge heads attached (STC) and with rigid tines on a parallelogram framework and cogwheel ridge discs attached (RTC) are shown in Figures 1b and 1c, respectively