Nursing Research Priorities

I'd say it depends who you work for. I work for a sponsor, and recruitment is definitely their #1 priority, whereas making sure patients are eligible and going to get a decent results is mine.

Ageism in nursing.
Ergonomic nursing.
Scheduling.
Further education.

Recruitment and retention of nursing generally, or of research nurses?

If you mean a research topic re recruitment and retention of nurses generally, it would have to be a qualitative study asking nurses what is important to them and what would make them stay. It's actually a difficult question to answer - people whine with no idea what they want, including me. My boss recently asked me what would make me stay (he knows I'm planning to leave if a new job comes through) and I didn't know what to say.