A direct drive seed metering device for sowing machines comprising a rotatable vacuum chamber operated by vacuum and driven by a coaxial electric motor, the rotatable vacuum chamber comprising a seed metering disc for capturing seeds from a reservoir and laying them in a controlled manner in a furrow in the soil, where in the coaxial electrical motor couples directly and coaxially to the rotatable vacuum chamber without the need for intermediate transmission elements, redactors, gears or timing belts, and where said coaxial electrical motor is a toroidal electric motor with a hollow rotor shaft, which fluidly connects said seed capturing means with a vacuum generating means.

A depth adjustment for an agricultural seed planting implement has a depth control assembly of side by side gauge wheels pivotally mounted to a frame with leading equal length arms in a staggered relation. A settable lever acts on the arms through a control rocker having arms with the same staggered relation to control soil flow.

Apparatuses, systems, and methods for coupling a row unit to a frame of an agricultural implement include a row unit, such as a planter row unit. The row unit may be coupled to a frame of an agricultural planter by engagement between mounting features of the planter row unit to one or more rails formed on a frame of the agricultural planter. One or more of the mounting features may be movable relative to one or more other mounting features in order to secure the planting row unit to the frame of the agricultural planter.

A seed delivery apparatus and methods in which a seed conveyor delivers seed from a metering device to a furrow in a controlled manner to maintain seed placement accuracy within the furrow.