A row unit for an agricultural planter has features for releasably operably coupling a seed meter of the row unit to a seed deposition apparatus of the row unit such as a seed conveyor, seed tube, or the like. Apparatus may be used for tipping a seed meter of the hopper for disengagement from the seed deposition apparatus, or for biasing the seed deposition apparatus into operative engagement with the seed meter. The row unit includes features such as latches for releasably operably coupling the row unit to crop input and vacuum supply lines. Apparatus may also be used for tipping a seed meter of the hopper for disengagement from the crop input and vacuum supply lines. Systems are used for supplying vacuum and crop inputs to the seed meter via the releasably engageable apparatus.