The primary considerations taken into account in the development and application of an electro-hydraulic control system to an agricultural tractor are reliability, durability, safety and value. The value factor being defined as function as it relates to economics. All the aforementioned factors were taken into consideration in this project. In addition, the system provides minimum operator input and maximum system flexibility. The application of a system to an Ag tractor requires the consideration of the environmental variables in which the tractor must function.