The set consists of three bi-partite gouge augers with different diameters. By first taking a sample with the gouge with the largest diameter and subsequently the gouges having smaller diameters, cross contamination among the samples is avoided. The gouge augers can be pushed into the soil or hammered (with an impact absorbing hammer). Because of the short operational length and the diminishing diameters, the set is very suitable for profile research (nitrate research) in soils with a somewhat higher penetration resistance.