An integrated programmable conductor memory cell and diode device in an integrated circuit comprises a diode and a glass electrolyte element, the glass electrolyte element having metal ions mixed or dissolved therein and being able to selectively form a conductive pathway under the influence of an applied voltage. A manifold set comprises a like plurality of product manifolds and each manifold is separately fed from one metering device on each of the seed and fertilizer tanks. The connecting piece of the valve body is placed in a connecting segment at a distance in the axial direction from the functional valve segment of the valve body, and the valve body is implemented as a single piece.