Effectiveness of NPK compound (15-15-6) fertilizer to improve maize performance in inceptisol soil

Abstract

Producer of fertilizer mandatory to carry out fertilizer effectiveness tests before their products were marketed, because the results of fertilizer effectiveness tests was determined by the Ministry of Agriculture to protect consumers from adverse impacts due to the use of fertilizer. The purpose of this study was to determine the effect of NPK compound (15-15-6) fertilizer to improve maize performance. The study was conducted Keling Village, Kepung Subdistrict, Kediri Regency, East Java Province, since January - April 2019. The study used RBD with 6 treatments and 4 replications, namely A = control, B = SFD, C = 300 kg Urea ha−1 + 50 kg SP-36 ha−1 + 200 kg NPK 15-15-6 ha−1, D = 300 kg Urea ha−1 + 50 kg SP-36 ha−1 + 300 kg NPK 15-15-6 ha−1, E = 250 Urea ha−1 + 400 kg NPK 15-15-6 ha−1, and F = 200 Urea ha−1 + 500 kg NPK 15-15-6 ha−1. The results showed that treatment F obtained of 8.35 t.ha−1, R/C-ratio 2,65, RAE value 137.38%, and the profite farming IDR. 21,850,000 per hectare.