Improvements in or Relating to Tractor-Baler Combinations

A method of controlling a (a) a tractor having a plurality of ground-engaging members and a steering mechanism configured for steering at least one said ground-engaging member a baler towed behind the tractor;

• (c) at least one sensor configured for sensing at least one swath line of crop material corresponding to a quantity of crop material per unit length of a swath;
• and (d) a controller that operates in dependence on at least one output of the at least one sensor to operate the steering mechanism;
• comprising the steps of
• sensing with at least one said sensor a swath line that is laterally offset from a direction of forward movement of the tractor while the baler is not following a line of a swath;
• and
• using the output of the said at least one sensor as an input to the controller whereby to operate the steering mechanism so that the baler is aligned for crop infeed with respect to the laterally offset swath line before the ingestion of crop material commences.