Your efforts have been 'productive of' many benefits. [=have produced many benefits]
The farmers learned to use their land more 'productively'.
Some staff members are more 'productive' than others.
(..) Just hunches and guesses and stuff? Okay. I understand that you're going through a bit of a career crisis. You're searching for some other area where you can feel valuable and productive. But I need to tell you something, and listen carefully. - All right. - Go away. (..)2008 TvShow: The Big Bang Theory Title: The Jerusalem Duality Season: 1 Episode 12