#$%^&*AU2019200288A120190801.pdf#####ABSTRACT OF THE DISCLOSURE A work vehicle includes row units. The row units each include an air pressure device configured to generate a pressure differential for retaining a commodity against a metering element to singulate and meter a commodity. The air pressure device includes an exhaust structure with a passage configured to direct an exhaust substance to the ground as the row unit travels.2 /8 183 184 SENSORS) .. ACTUATOR 160--, 185 SENSOR(S) CONTROLLER - ACTUATOR 1 PROCESSOR 186 161 N125 176 %.SENSOR(S) ACTUATOR 152 172 SENSOR(S 150 190 ACTUATOR 121---, 149, 135 170 13 0 9--,, 19 146 156 166 191 ° 133 168 19 2 127 175 140 13713 158 148 104 193 102 122 10312 198 12 115 142 -105 14 3 106 17 126 18 3144 FIG. 2
