outer channel 356 which provide a vacuum area for seed holes 334 and 336 on seed plate 330 the vacuum applied to the back of plate 350 is transferred to the chambers through openings 358 360 362 and 364 aperture 352 accommodates vacuum seal 376 shown in fig4 opening 362 in vacuum seal plate 3650 accommodates inner vacuum cutoff shoe 370 and opening 364 in vacuum seal plate 350 accommodates outer vacuum cutoff shoe 372 shown in fig4 and 44 vacuum cutoff shoes 370 and 372 are spring or biased to the back side of seed plate 330 and pulled off or disengaged from plate 330 upon actuation of inner solenoid 380 and outer solenoid 382 shown in fig9 which are linked to inner shoe 370 and outer shoe 372 through connecting rods extending through apertures in vacuum housing plate 378 solenoids 380 and 382 are held in place with mounting block 384 secured to housing 378 when vacuum cutoff shoes 370 and 372 are spring loaded to seed plate 330 they cutoff the vacuum to the respective set of seed holes 334 and 336 and prevent seed in the inner and outer sumps 250 and 251 from being picked up when one of the shoes 370 or 372 is pulled from plate 330 by actuation of either solenoid 380 or 382 respectively the vacuum is allowed to reach holes 334 and 336 in seed plate 330 where seed in the inner 250 or outer 251 sump may be picked up this permits staging of the seed against seed plate 330 so that it is readily available for the start of a plot additionally this permits more accurate starts and stops to plots.