The job posting I read today from Bridgewater State University did the former (Masters required, PhD preferred), but nowhere details what the new adjust faculty member will do or in what area of geography they might need expertise. Here's what the candidate learns from the job posting:
The Department of Geography is looking for part-time adjunct faculty for the Spring 2013 semester. ...I'd guess the selected candidate will teach intro classes. I wonder why there's no indication of that or any other responsibilities. The second paragraph is clearly generic and probably appears in all faculty position postings for all departments. There's not even a link to the department home page to learn more.
Applicants should be strongly committed to excellence in teaching and advising, and to working in a multicultural environment that fosters diversity. They should also have an ability to use technology effectively in teaching and learning, the ability to work collaboratively, evidence of scholarly activity, and a commitment to public higher education.
It's the kind of job posting that makes me not want to bother to respond. And, that's too bad since it's a good department. I know; I taught at Bridgewater State (then College, now University) in the past. That, and only that, provides me insight and motivation to consider applying.