Final Exam Questions

The final will focus on the material covered after the midterm exam, but since the nature of the soil science material is such that numerous concepts are connected, you cannot completely overlook the material covered in the 1st half of the course. For example, question from our discussion no.3 re. the Goose soil is an excellent example of a question where numerous concepts will need to be summarized.

Hey Maja, for explaining why a Bn, Bf, Bt, horizon exists could we say that they were illuviated by substances from the A horizon and that they were enriched by the C horizon. If you had parent material with a high clay content couldn't that lead you to having a Bt horizon? I am just making sure that we should incorporate both the C and A when describing the factors that created the B. Thank you!

Some materials (clay, salts, organic matter) are brought into the B horizons from either A and/or C horizons. But then there are also numerous soil formation processes that occur in the B horizon itself. Some examples of those processes are gleying (Bg), shrinking/swelling of clay (Bss and Bv), weathering of minerals (Bf), freezing/thawing (By)...