College - Author 1

College of Agriculture, Food and Environmental Sciences

Department - Author 1

BioResource and Agricultural Engineering Department

Degree Name - Author 1

BS in BioResource and Agricultural Engineering



Primary Advisor

Richard Cavaletto


This senior project discusses the design, construction, and testing of a seven shank, three point ripper built for de Graaf Ranch. This ripper will replace older equipment that was not built to withstand the horsepower developed by more modern tractors that are used by de Graaf Ranch. This tillage device is designed to meet ASABE standards for horsepower requirements of farm equipment. This implement incorporates a shear pin design that will protect the frame from damage in the event that the ripper encounters a subsoil obstacle that would significantly damage the equipment. The shank was designed to reduce the disturbance of the topsoil while causing more disturbance in the subsoil, thus reducing the need for post till operations, increasing efficiency, and helping to preserve the environment.

Testing of the ripper on eight hundred plus acres of various types of soil confirms that the shank design is an improvement from older designs by reducing the topsoil disturbance. The implement operates in a desirable manner and meets all the needs of the consumer.