I vaguely remember a short story (I think by either Asimov or Clark) where there were specialists who's entire job was to read and write in a couple of differen

I vaguely remember a short story (I think by either Asimov or Clark) where there were specialists who's entire job was to read and write in a couple of different fields, like, say, particle physicist and farmer. They didn't perform any experiments, but instead kept up with current research in their fields and searched for general patterns that united them. I've never been able to find the story again though...