Cottonseed Oil Fertilizer is a type of bone meal (technically) with a much stronger effect. It is either crafted or extracted from 4 cotton seeds, depending on whether Technic mod is installed.
This is a portion of Technics mod from Smacker's fork, the fork used on LinuxForks Minetest Server.
According to the original license notice, all components of this mod are licensed under LGPLv2.1.