Abstract
A tractor guidance system is developed to support the operator to control the tractor following the target line in the field for plowing fertilizing , pesticide spraying ,sowing, harvesting, manuring ,etc. In the system, an alternative integration solution basing on standard 2^<nd> Kalman Filter (KF) algorism was developed. The system not only estimate more accurate real-time data, but also strengthen the state predicting function, considering the delay of the driving operation. Position, direction, speed and an efficient working route were displayed graphically.
