The Dualem 21s is a non-invasive soilscanner for measuring soil conductivity in 4 different depths (up to 3m). For each zone in those conductivity maps, a soil sample in max. 3 different layers (up to 60 or 90 cm depth) is collected by the Fritzmeier Profi, meanwhile measuring compaction with the penetrologging function. A soil conductivity scan gives an insight about the variability in the soil, which enables further investigation of the causes, eg. by more representative soil samples. With current precision technology more efficient adaptations to this variability are possible, eg. by variable allocation of means.