Vehicle-trailer combinations

1. A system comprising:

an agricultural tractor comprising a steering mechanism for causing changes in a direction of movement of the agricultural tractor;

an agricultural implement that is towed behind the agricultural tractor as the agricultural tractor moves forwardly and is pivotably connected to the tractor;

at least one forward sensor for sensing one or more objects or conditions located forwardly of the agricultural tractor;

at least one lateral sensor for sensing one or more objects or conditions in a subsequent path and harvest products in a swath along the subsequent path that when sensed are located laterally of the agricultural tractor or the agricultural implement as the agricultural tractor and the agricultural implement travel a first path, the first path and the subsequent path being adjacent each other; and

a controller connected to the steering mechanism, the at least one forward sensor, and the at least one lateral sensor, the controller being configured to:

receive at least one first output from the at least one forward sensor;

receive at least one second output from the at least one lateral sensor;

determine an optimized path of the subsequent path before commencing travel on the subsequent path, the optimized path taking account of a presence of the one or more objects or conditions and the harvest products in the swath along the subsequent path which are sensed by the at least one lateral sensor; and

control the steering mechanism to cause a change in the direction of movement of the agricultural tractor based on the at least one first output and the at least one second output.

2. The system according to claim 1 , wherein the at least one lateral sensor senses a field of view that is at least a two-dimensional polygon located laterally of the agricultural tractor or the agricultural implement, the location of the polygon moving as the agricultural tractor and the agricultural implement move to define a trajectory field of view approximating to a trajectory of the agricultural tractor and the agricultural implement.

3. The system according to claim 1 , wherein the at least one lateral sensor comprises an optical or point cloud generating camera.

4. The system according to claim 1 , wherein the controller operates the steering mechanism to steer the agricultural tractor so as to avoid the one or more objects or conditions sensed by the at least one lateral sensor.

5. The system according to claim 4 , wherein the controller operates the steering mechanism to steer the agricultural tractor so as to change a positioning of the agricultural tractor or the agricultural implement with respect to the one or more objects or conditions sensed by the at least one lateral sensor.

6. The system according to claim 1 , wherein the at least one lateral sensor senses the one or more objects or conditions located laterally of the agricultural tractor or the agricultural implement during passage of the agricultural tractor and the agricultural implement along a first swath along the first path, in a field, encountered by the agricultural tractor and the agricultural implement; and wherein the controller causes the agricultural tractor and the agricultural implement to take account of a presence of the one or more objects or conditions sensed by the at least one lateral sensor during passage of the agricultural tractor and the agricultural implement along a subsequently encountered swath in the field.

7. The system according to claim 1 , wherein the controller is further configured to map locations of the one or more objects or conditions sensed by the at least one lateral sensor.

8. The system according to claim 7 , wherein the controller is configured to map the locations of the one or more objects or conditions sensed by the at least one lateral sensor that are not sensed by the at least one forward sensor.

9. The system according to claim 2 , wherein the controller is further configured to map one or more waypoints, approximating to the trajectory of the agricultural tractor and the agricultural implement, in the trajectory field of view sensed by the at least one lateral sensor.

10. A method of operating a system according to claim 1 , the method including steps of:

causing the at least one lateral sensor to sense the one or more objects or conditions that when sensed are located laterally of the agricultural tractor or the agricultural implement; and

causing the controller to act in dependence on at least one of the first output and the second output to take account of the one or more objects or conditions sensed by the at least one lateral sensor.

11. The method of claim 10 , further including a step of causing the controller to operate the steering mechanism of the agricultural tractor such that the agricultural tractor and the agricultural implement follow the optimized path that takes account of the presence of the one or more objects or conditions sensed by the at least one lateral sensor.

12. The method of claim 11 , further including a step of causing the controller to operate the steering mechanism such that the agricultural tractor steers to avoid the one or more objects or conditions sensed by the at least one lateral sensor.

13. The method of claim 10 , further including steps of:

operating the at least one lateral sensor to sense the one or more objects or conditions located laterally of the agricultural tractor and the agricultural implement during passage of the agricultural tractor and the agricultural implement along a first swath along the first path, in a field, encountered by the agricultural tractor and the agricultural implement; and

causing the controller to operate the steering mechanism to steer the agricultural tractor and the agricultural implement to take account of a presence of the one or more objects or conditions, sensed by the at least one lateral sensor, during passage of the agricultural tractor and the agricultural implement along a subsequently encountered swath in the field.

14. The method of claim 10 , further including a step of causing the controller to map locations of the objects or conditions sensed by the at least one lateral sensor or one or more waypoints.

15. The method of claim 10 further including steps of:

causing the controller to estimate one or more of (i) an absolute quantity of un-baled harvest products in the swath; and/or (ii) an absolute quantity of un-baled harvest products in a plurality of swaths; and (iii) a specific quantity of un-baled harvest products per unit length of one or more swaths, and

calculating one or more parameters therefrom.