Actually, as for agriculture, it's not as useless
in QB as one might expect, you just have to find the
right format, such as the horrors that are "Beef Bowl"
as discovered in 1998 by Dwight Kidder. Or, to make
it even more frightening, his discovery of a study
guide for "Dairy Bowl."
As for useless majors, I
think history's usefulness comes not from the classes
that a history major takes, but the TV that we get to
watch when we should be writing
papers.
Actually, honestly, a useless QB major is education,
outside your question occasional question on John Dewey
or Lev Vygotsky, you really are only stuck then with
classroom management and Bloom's taxonomy, which, while
helpful in running a team and learning how to learn, it's
not that helpful in canon content.
CDB