The invention provides a mechanical device to assist in weed removal from crops in an organic manner by mechanically pulling weeds by use of a rotating member to grasp and pull weeds from the soil while leaving the desired crop in place. The rotating members may be wheels, metal rollers, and combinations thereof removably attached to a tractor wherein one rotating member is larger in diameter than a second rotating member diameter.

An agricultural machine for performing a cultivation operation on a field with plants in a regular, non-square pattern, in parallel, linear rows with a first transverse distance between adjacent rows in a first direction being smaller than a second transverse distance between adjacent rows in a second direction different from the first direction. The agricultural machine is connected to a first set of work units with lateral distances between adjacent work units of the first set of work units corresponding to the first distance, and to a second set of work units which are adapted to be inoperative during operation of the agricultural machine in the first direction and adapted to be operative during operation of the agricultural machine in the second direction to cover the areas between adjacent rows which cannot be treated with the work units of the first set of the work units.

An agricultural machine for performing a cultivation operation on a field with plants in a regular, non-square pattern, in parallel, linear rows with a first transverse distance between adjacent rows in a first direction being smaller than a second transverse distance between adjacent rows in a second direction different from the first direction. The agricultural machine is connected to a first set of work units with lateral distances between adjacent work units of the first set of work units corresponding to the first distance, and to a second set of work units which are adapted to be inoperative during operation of the agricultural machine in the first direction and adapted to be operative during operation of the agricultural machine in the second direction to cover the areas between adjacent rows which cannot be treated with the work units of the first set of the work units.

A management control device controls multiple unmanned vehicles, including the overtaking of a vehicle using an opposite lane. First and second travel permission sections are set for an own vehicle and another vehicle in a stopped state located ahead of the own vehicle on a traveling lane. A path by which the own vehicle overtakes the other vehicle is generated to include a first transition section to change lanes from a traveling lane to an opposite lane, an overtaking section that connects to the first transition section. Also included is a second transition section that connects to the front end of the overtaking section and is for the own vehicle to return to the traveling lane. The section length of the second travel permission section being set in advance is thereby shortened.

A management control device controls multiple unmanned vehicles, including the overtaking of a vehicle using an opposite lane. First and second travel permission sections are set for an own vehicle and another vehicle in a stopped state located ahead of the own vehicle on a traveling lane. A path by which the own vehicle overtakes the other vehicle is generated to include a first transition section to change lanes from a traveling lane to an opposite lane, an overtaking section that connects to the first transition section. Also included is a second transition section that connects to the front end of the overtaking section and is for the own vehicle to return to the traveling lane. The section length of the second travel permission section being set in advance is thereby shortened.

The invention provides a mechanical device to assist in weed removal from crops in an organic manner by mechanically pulling weeds by use of a rotating member to grasp and pull weeds from the soil while leaving the desired crop in place. The rotating members may be wheels, metal rollers, and combinations thereof removably attached to a tractor wherein one rotating member is an inflated rubber tire and the second rotating member is a metal roller wrapped with a rubber lagging and may include a posi-pull system.

A management control device controls multiple unmanned vehicles, including the overtaking of a vehicle using an opposite lane. First and second travel permission sections are set for an own vehicle and another vehicle in a stopped state located ahead of the own vehicle on a traveling lane. A path by which the own vehicle overtakes the other vehicle is generated to include a first transition section to change lanes from a traveling lane to an opposite lane, an overtaking section that connects to the first transition section. Also included is a second transition section that connects to the front end of the overtaking section and is for the own vehicle to return to the traveling lane. The section length of the second travel permission section being set in advance is thereby shortened.

An agricultural machine includes a soil strength generation system that generates an output indicator of soil strength. A control system generates on action signal based on the soil strength.