Tractor and baler combination with automatic baling and tractor halt control

A combination of a tractor and a baler, wherein

• the tractor comprises:
• a tractor frame, driven ground engaging means supporting the tractor frame upon the ground, an engine, a power transmission arrangement coupled between said engine and said driven around engaging means, an electrically responsive actuator arrangement coupled to said power transmission arrangement for effecting changes in propelling speed of said ground engaging means and an electronic tractor controller coupled to said actuator arrangement and being operable to effect operation of said actuator arrangement so as to control the propelling speed of the ground engaging means;
• the baler comprises:
• a baler frame coupled or connected to the tractor frame, a crop receiving means supported on the baler frame for receiving crop from a field, a baling chamber supported on the baler frame for receiving crop from said receiving means and for pressing crop received from the crop receiving means to form a bale, a bale size sensor associated with the baling chamber for detecting the size of a bale within the baling chamber, and an electronic baler controller connected to the bale size sensor and to the tractor controller;
• wherein the baler controller operates in response to receiving a bale size signal provided by the bale size sensor indicating that a bale has reached a size equal to or exceeding a first predetermined size, to send a halt signal to said tractor controller, which operates in response to said halt signal command the electrically responsive actuator arrangement to effect operation of said power transmission arrangement for causing said ground engaging means to automatically halt the tractor when said tractor controller is receiving said a halt signal from the baler controller.