ABSTRACT An experiment to know the effect of concentration of natrium nitrophenol on growth and yield of some tomato cul- tivars (Lycopersicum esculentum Mill) had been conducted from October 1995 to January 1996, at Kedungsari, North Magelang, Magelang, Central Java. The altitude is 380 meters above the sea level, the soil type is latosol with pH 6,5. The method is factorial…