Some soil-tool analogs.

ABSTRACT THE feasibility of using analog tool data with scale model data to predict draft forces on a prototype tillage tool was investigated using three analog-prototype systems. The three analog-prototype systems were a cone penetrometer-chisel, a cone penetrometer-disk, and a chisel-disk. These systems were operated at low speed in six soil conditions, and data were analyzed for three scaled-depth levels. The cone penetrometer-disk system proved to be the best analog-prototype system.