In one aspect, an agricultural planted is associated with an apparatus, a system and/or a method for calibrating a depth control arrangement in each of one or more row units adapted for attachment to a toolbar of the planter, where each row unit has a depth controlling linkage arrangement operatively connected to an adjustable-depth gauge wheel of the row unit. The linkage arrangement includes a load-sensing element that is monitored during adjustment of a calibration mechanism of the linkage arrangement to remove tolerance stack-up in the linkage arrangement and achieve a uniform desired value of the present load on the linkage arrangement of each of the one or more row units that is consistent with a zero-depth or other reference depth setting.