I know its been suggested before but mostly to gain high q soil, making soil nodes useless, and have a different take on what it should do.
It would need a lot of fodder to create compost.
Increase Tree quality:
Compost could be used on a sprouted tree (still in the pot) to increase the quality of the tree. (Example: 1-2+ q at q10)
Cure Stunted Trees:
Any quality compost can unstunt trees given they have enough space to grow, ether by resetting the timer for that stage or have them grow in X amount of time.
Reduced time for produce from trees:
Compost could be used to reduce time it takes for trees to regrow branches, bark, etc. (Example: 10-15% at q10)