Unlock the Compost Bin or Industrial Cooker
Gather Dung Beetles or a Phiomia for poop production
Collect Feces from creatures or humans
Collect thatch
Place feces and thatch into a Compost Bin to make Fertilizer over time
Use a Dung Beetle to convert feces into Fertilizer and Oil
Use Fertilizer in crop plots to grow plants faster and longer