ABSTRACT An experiment is to study the effect of N, P and K fertilizer dose on yield of corn (Zea mays, L.), had been done since June 4th until October 25th, 2003 in Maduretno Village, Kaliangkrik District, Magelang Regency, Central Java. The altitude is 750 m, soil kind is andosol and pH is 5,85. The method of experiment is factorial (3x3x3) with completely randomized block design and …