This mod assists you in tilling on your farm, providing information about moisture state of future farmland.
I created this mod purely for myself but found it useful for other people, so now it is here.
What does this mod do: when you have in your hand any tool like a hoe, if you hover over a block that you can dig, then above your hotbar will appear a message about the state of the future farmland - will it be DRY or MOIST.
You can check out sources if you want to see an implementation.