That's why I had this idea.
For Food and Minerals:
Each number in brackets stands for how many tiles of a specific quality are available.
Teal=More than 3
Green=3
Yellow=2
Red=1
For Industry and Science:
Number in brackets shows available Construction Bays/Field Labs.
Of course this should also be shown in empire-management-screen.
This change would dramatically enhance the microing aspect of population-assignation with not too much programming effort.