The farmable planet is PERFECT. Don't worry about the fields.
I'm going to call your dud planet the terraformable planet and make a dud planet based on it:
The terraformable planet reminds me of Mars with the use of red and orange. For the dud I was thinking of something more like the moon, Pluto, or Neptune. The deep blue isn't there so much to imply water as minerals or other goodies that the player might mine out for soil amendments in later versions of the game.
How should I credit you in the game?