This unit combines a dynamic probing rig with an integrated rod extraction system and allows for simple, quick and efficient soil sampling procedures for agricultural purposes down to 1 m. A closed sampling tube with plastic liner tube inside is driven down to the required depth. After recovering the soil sample is located inside the liner tube. Definition of fertilizer consumption is only one application of this device, every other soil parameter (degradability of insecticides or pesticides for example) can be obtained.