Fecha de publicación: 18/02/2016 Fuente: WIPO "organic farming" Disclosed are methods for forming ammonia and ammonium that can be utilized in certifiably organic farming productions according to most if not all known certification standards. Also disclosed are bioreactors that can be utilized in carrying out disclosed methods. Methods and systems utilize obligate anaerobic bacteria to breakdown organic protein substrates, i.e., compounds containing bound nitrogen, to provide nitrogen in an unbound plant available form, and particularly, ammonia and/or ammonium. Obligate anaerobic bacteria include high ammonia producing bacteria such as Peptostreptococcus anaerobius, Clostridium sticklandii, and Clostridium aminophilum.