A mollusc farming machine deploys a tillage assembly connected by a support frame to a vehicle platform. The vehicle platform enables the user to mechanically traverse the tillage assembly across an aquaculture harvesting area, digging into the earth of the harvesting area in order to harvest clams and other molluscs. An agitating mechanism causes reciprocal motion of the tillage assembly in order to break up the aquaculture earth as a tilling section of the tillage assembly is displaced at an angle through the earth, forcing the earth and any buried molluscs onto the tillage section. The agitating motion further serves to sift the earth by causing dirt, plant matter and other debris to fall through spaces between a plurality of sifting rods of the tilling section, leaving behind any molluscs previously buried within the earth to be collected by workers.

A mollusc farming machine deploys a tillage assembly connected by a support frame to a vehicle platform. The vehicle platform enables the user to mechanically traverse the tillage assembly across an aquaculture harvesting area, digging into the earth of the harvesting area in order to harvest clams and other molluscs. An agitating mechanism causes reciprocal motion of the tillage assembly in order to break up the aquaculture earth as a tilling section of the tillage assembly is displaced at an angle through the earth, forcing the earth and any buried molluscs onto the tillage section. The agitating motion further serves to sift the earth by causing dirt, plant matter and other debris to fall through spaces between a plurality of sifting rods of the tilling section, leaving behind any molluscs previously buried within the earth to be collected by workers.

A work vehicle includes a chassis, and a work implement movably coupled to the chassis, the work implement configured to perform a field-engaging function. The work vehicle also includes an actuator coupled to the work implement and configured to adjust a position of the work implement relative to a ground surface, and a controller in communication with a communication module. The controller is configured to monitor a location of the work machine via the communication module, and load a field map that identifies spatial information about a corresponding field, and a characteristic of the actuator associated with the spatial information. The controller is further configured to partition the spatial information into at least one pass traversable by the work machine. The controller is also configured to create an adjustment event to adjust the actuator in response to the location of the work machine moving within the at least one pass.

A work vehicle includes a chassis, and a work implement movably coupled to the chassis, the work implement configured to perform a field-engaging function. The work vehicle also includes an actuator coupled to the work implement and configured to adjust a position of the work implement relative to a ground surface, and a controller in communication with a communication module. The controller is configured to monitor a location of the work machine via the communication module, and load a field map that identifies spatial information about a corresponding field, and a characteristic of the actuator associated with the spatial information. The controller is further configured to partition the spatial information into at least one pass traversable by the work machine. The controller is also configured to create an adjustment event to adjust the actuator in response to the location of the work machine moving within the at least one pass.

A system includes a tractor comprising a lifting hitch, and an implement comprising an implement frame carried by the lifting hitch. The implement frame has an integrated elongate toolbar carrying at least one row unit. A sensor is configured to sense a position of the at least one row unit relative to the ground. A control system is configured to receive a signal related to the sensed position of the at least one row unit relative to the ground and cause the lifting hitch to raise or lower a portion of the implement frame connected to the lifting hitch relative to the tractor based at least in part on the signal. Control systems and related methods are also disclosed.

A header positioning assembly for adjusting a header relative to a chassis includes a lift mechanism configured to couple the header to the chassis, at least one lift actuator configured to apply a force to the lift mechanism to adjust and maintain an orientation of the lift mechanism relative to the chassis, and an adjustment mechanism coupled to the at least one lift actuator or to the lift mechanism. The adjustment mechanism is positionable in at least two orientations and configured so that when the adjustment mechanism is in the at least two orientations, and without uncoupling the adjustment mechanism from the at least one lift actuator or the lift mechanism to which the adjustment mechanism is coupled, the adjustment mechanism changes one or more of a location and a direction of the force applied to the lift mechanism by the at least one lift actuator.

A tractor in which a lift valve of a hydraulic system for lifting up/down a work machine is mechanically coupled to a lift lever, and conditions for an engine startup are set as follows: a reverser lever is at a neutral position thereof; a PTO (power take-off) clutch is disengaged; a seat switch is ON; and the lift lever is at a lowermost position thereof. A switch driving unit is provided on a side face of the lift lever so that the side face is orthogonal to a turning direction of the lift lever; a switch is provided so as to be opposed to the switch driving unit when the lift lever is turned to be at the lowermost position; and the lift lever at the lowermost position is detected by the switch.

A tractor in which a lift valve of a hydraulic system for lifting up/down a work machine is mechanically coupled to a lift lever, and conditions for an engine startup are set as follows: a reverser lever is at a neutral position thereof; a PTO (power take-off) clutch is disengaged; a seat switch is ON; and the lift lever is at a lowermost position thereof. A switch driving unit is provided on a side face of the lift lever so that the side face is orthogonal to a turning direction of the lift lever; a switch is provided so as to be opposed to the switch driving unit when the lift lever is turned to be at the lowermost position; and the lift lever at the lowermost position is detected by the switch.

This region registration system is provided with a positioning antenna, a position acquisition unit, a reference-point specification unit, a direction specification unit, a candidate-point registration unit, and a region registration unit, and acquires an antenna position as a measurement point. The reference-point specification unit specifies a corner antenna reference point. The direction specification unit specifies a turning direction of a rice seedling transplanter that has passed the corner antenna reference point. The candidate-point registration unit biases the corner antenna reference point to a position forward of the rice seedling transplanter at the time of measuring said corner antenna reference point, and at the same time, registers, as a corner candidate point, a position biased toward either side in the width direction of said rice seedling transplanter in accordance with the turning direction specified by the direction specification unit. The region registration unit is capable of registering a region that encompasses a corner candidate point.

In one aspect, a method is disclosed for automatically controlling a position of an implement of an agricultural work vehicle relative to a ground surface. The method may include monitoring, with one or more computing devices, an implement position parameter indicative of the position of the implement relative to the ground surface. The method may also include calculating a normal output signal based on the implement position parameter. The method may also include determining when a boost condition is satisfied based on a comparison between the implement position parameter and a predetermined implement position parameter threshold. The method may also include computing a boost output signal based on the implement position parameter. The method may also include adjusting the position of the implement relative to the ground surface based on the normal output signal and the boost output signal.