... fertilizer 12--12-17+2MgO,NPK12-12-17 bule color,white color fertilizer. NPK12-12-17 Compound fertilizer, NPK fertilizer 12--12-17+2MgO,NPK12-12-17 ... stable, amorphous state, is made from plant materials mixed with manure and some soil. Green manure is a herbaceous plant material plowed ...