Abstract: A product distribution device shown as an agricultural air seeder in which product distribution can be selective stopped and started in sections of the machine width. The functioning of the section control system is monitored by sensors that directly detect the control member position as opposed to sensing the commanded position of the control member. Likewise, in generating a map of the area covered, the actual detected position of the control member is used instead of the commanded position of the control member. An operator is notified of inconsistencies between the commended position of the control member and the sensed position.

Abstract: A product distribution device shown as an agricultural air seeder in which product distribution can be selective stopped and started in sections of the machine width. The functioning of the section control system is monitored by sensors that directly detect the control member position as opposed to sensing the commanded position of the control member. Likewise, in generating a map of the area covered, the actual detected position of the control member is used instead of the commanded position of the control member. An operator is notified of inconsistencies between the commended position of the control member and the sensed position.

Abstract: A mutually-engageable or interlocking connection between a seed tube guard and a frame member mounted to a seed planting machine. The mutually-engageable connection includes a yoke having a front journal and a rear journal with a gap, the yoke, carried on the frame member, and a pin connected to a neck, carried by the guard. The pin is sized to fit between and into the front and rear journals, wherein the neck has a thickness less than a width of the gap in order to slide though the gap during installation, and a length to fit between and through the front and rear journals.