Optimization of N, P, and K Single Fertilizer Package for Oil Palm Aged Four Years

Fertilizer is one of the main sources of nutrients given for oil palm. High plant productivity in oil palm plantations can not be separated from the role of good fertilization. The goal of this research was to study the effect of N, P, K and to determine the optimum rate of N, P, K single fertilizer package on growth and production of four years of oil palm. This research was conducted from April 2016 to march 2017 at IPB-Cargill Teaching Farm of Oil Palm, Jonggol, Bogor, West Java. The experiment was arranged in a randomized block design with one factor and three replications. The fertilizer treatments were four packages, they were: control (P0), fertilizer package of 1500 g urea + 1000 g SP-36 + 1500 g KCl + 50 g borat + 50 g CuSO4.5H2O each plant (P1), fertilizer fackage o