Fertilizer

You can produce fertilizer from sewage, which will provide a fertility boost for just under a year when placed on growable terrain. The system for creating fertilizer works exactly the same as brewing beer, just instead of hops its sewage, instead of a barrel its a composter, and instead of beer it produces fertilizer.

First you must research Sewage Sludge Composting, then you can collect sewage from septic tanks by setting the percentage threshold for when it should be emptied by a hauler, or by using the remove sewage designator to extract sewage deposited by sewage outlets on the ground. You then build composters, load the sewage, and wait. The patches of fertilizer are built as a standard construction job and can be deconstructed, they can be destroyed and must be manually replaced once they run out or die.

Like irrigation it should stack with any modded terrain types, use the mod options to adjust the strength to your liking.