The purpose of this research is to: (1) to analyze the benefits and effects of ameliorant doses on maize growth in the RPH-G concession land. (2) To analyze the cost of each type of amelioran dose used on maize in the study area. (3) To analyze the effect of the amelioran on corn farming income seen from the cost of each dose in the study area. This research was conducted in the RPH-G concessio…