A fertiliser not listed in the FCO cannot be labelled an sold as fertiliser because it is

A fertilizer not listed in the FCO cannot be labeled and sold as fertilizer because it is not recognized as fertilizer.
The Fertilizer Control Order (FCO), 1985, enacted under The Essential Commodities Act, of 1955, is being implemented to regulate the trade, price, quality, and distribution of fertilizers in the country.
The FCO provides for compulsory registration of fertilizer manufacturers, importers and dealers, specification of all fertilizers manufactured/imported and sold in the country, regulation on the manufacture of fertilizer mixtures, packing and marking on the fertilizer bags, the appointment of enforcement agencies, etc.