What were possible sources of error in hand auger lab?

Possible sources of error in a hand auger lab could include inconsistencies in the depth at which the auger is inserted into the soil, variations in the angle at which the auger is operated, and inaccuracies in measuring the soil samples retrieved. Additionally, factors such as soil compaction, presence of roots or rocks, and variations in soil moisture content could also contribute to errors in the results obtained.