acetify, acidify, acidulate, alkalify, alkalize, ammonia, borate, carbonate, castor-bean meal, catalyze, chemical, chlorinate, commercial fertilizer, compost, dressing, dung, electrolyze, enrichener, ferment, fertilizer, guano, homopolymerize, hydrate, hydrogenate, hydroxylate, isomerize, manure, muck, night soil, nitrogen, organic fertilizer, oxidize, pepsinate, peroxidize, phosphate, phosphatize, polymerize, reduce, sulfate, sulfatize, sulfonate, superphosphate, work