A wheel track monitoring system for an irrigation system monitors the condition of a wheel track and alerts an operator and/or automatically takes corrective action when a wheel track develops ruts or other conditions that may adversely affect operation of the irrigation system. The wheel track monitoring system includes a wheel track condition sensor, a location sensor, and a processing system. The processing system receives and stores wheel track condition data and location data from the sensors as the irrigation system travels across a field and creates a log of wheel track condition data for multiple locations in the field. The processing system also analyzes the wheel track condition data to determine if the condition of the wheel track is unacceptable at any locations in the irrigated field and generates a corrective action signal if the condition is unacceptable.

An automatic steering system for a work vehicle includes: a steering travel apparatus for performing leftward turning based on a leftward steering amount with respect to a straight-forward direction and performing rightward turning based on a rightward steering amount with respect to a neutral position; a subject vehicle location calculator for calculating a location of a subject vehicle; a locational shifting calculator for calculating locational shifting from the travel route and the location of the subject vehicle; a vehicle body direction calculator for calculating a vehicle body direction that indicates a direction of a vehicle body; a directional shifting calculator for calculating directional shifting from the travel route and the vehicle body direction; a steering amount calculator for calculating a first steering amount, which is a steering amount for correcting the locational shifting and the directional shifting, based on the locational shifting and the directional shifting; and a steering amount limiter for limiting the first steering amount based on a second steering amount, which is the steering amount at present.

A traveling assistance system for an agricultural machine includes a position detector to detect a position of an agricultural machine, a criterion creator to create a determination criterion located forward of the agricultural machine for determination about a turn of the agricultural machine, an area identifier to identify a first area and a second area, the first area being an area in which the agricultural machine travels in a predetermined circumferential direction and the working device performs work, the second area being an area which is a portion of an agricultural field, which is adjacent to the first area, and in which entry of the agricultural machine is prohibited in advance, and a setter to, in a case where the determination criterion is located in the second area, set a turning portion at a position in the first area and between the agricultural machine and the second area.

A method for working a plot of land simultaneously by at least two agricultural robots operating autonomously and independently, in accordance with instructions and/or commands transmitted by a common central management and control system, includes subdividing said plot of land to be treated into at least two distinct work zones and allocating each work zone exclusively to one of the agricultural robots. At least during the working phase, the width of the majority of the work zones is equal to a multiple, greater than or equal to 1, of the working width of the agricultural robot to which it is exclusively allocated. During work on a plot of land, work zones not yet worked are exclusively allocated to various agricultural robots, respectively, in a gradual manner according to the completion of the work undertaken by the agricultural robots in the various zones allocated to them.

An automatic steering system for a work vehicle includes: a steering travel apparatus for performing leftward turning based on a leftward steering amount with respect to a straight-forward direction and performing rightward turning based on a rightward steering amount with respect to a neutral position; a subject vehicle location calculator for calculating a location of a subject vehicle; a locational shifting calculator for calculating locational shifting from the travel route and the location of the subject vehicle; a vehicle body direction calculator for calculating a vehicle body direction that indicates a direction of a vehicle body; a directional shifting calculator for calculating directional shifting from the travel route and the vehicle body direction; a steering amount calculator for calculating a first steering amount, which is a steering amount for correcting the locational shifting and the directional shifting, based on the locational shifting and the directional shifting; and a steering amount limiter for limiting the first steering amount based on a second steering amount, which is the steering amount at present.

A wheel track monitoring system for an irrigation system monitors the condition of a wheel track and alerts an operator and/or automatically takes corrective action when a wheel track develops ruts or other conditions that may adversely affect operation of the irrigation system. The wheel track monitoring system includes a wheel track condition sensor, a location sensor, and a processing system. The processing system receives and stores wheel track condition data and location data from the sensors as the irrigation system travels across a field and creates a log of wheel track condition data for multiple locations in the field. The processing system also analyzes the wheel track condition data to determine if the condition of the wheel track is unacceptable at any locations in the irrigated field and generates a corrective action signal if the condition is unacceptable.