If you are using the Auger Technique 1. Auger to a depth of 1 or 2 cm past the top of the horizon to be sampled. If the horizon is thinner than the length of the auger head, partially turn the auger so that the whole sample will be from one horizon. Place the sample in a labeled bag or other soil conainer. Avoid touching the sample and contaminating it.
Repeat steps one and two for each horizon of three profiles.
Bring these samples in from the field, and spread them on separate plastic plates or sheets of newspaper to dry in the air.