A hydraulic latching circuit is provided that allows a load-sense power source to be activated and deactivated depending on the SCV function. The load sense power source is activated when the wing cylinders are fully extended to maintain proper down force on the wings. It remains activated or latched when the SCV is returned to neutral. It is deactivated or unlatched when the wing cylinders are retracted. Two circuits have been devised to accomplish this latching function. Both of these latching circuits can be used with the sequencing circuit.