This study was motivated by the land concessions granted by the government to various companies operating in the plantation sector, which resulted in the limited availability of highly fertile land, thus forcing farmers to utilize marginal lands such as sandy soil. As is known, sandy soil has low fertility, fast permeability, low water holding capacity, and is susceptible to nutrient leaching. This research aimed to determine the content of N, P, and K nutrients in plant tissue before and after the application of supplementary fertilizer on oil palm planted in sandy soil. The study was conducted by collecting data (primary and secondary data) and sampling plant tissue using the random sampling method. Data analysis using unpaired sample t-test. The results showed that the content of Nitrogen (N), Phosphorus (P), and Potassium (K) nutrients in the oil palm plant tissue on sandy soil was not significantly different between before and after the application of supplementary fertilizer. The average content of N and K nutrients in the plant tissue was categorized as low, while the P nutrient was categorized as high, based on the leaf nutrient status criteria for oil palm. The absence of a significant difference is strongly related to Liebig's Law of the Minimum, where the overall increase in yield is constrained by the nutrient with the lowest availability, namely Nitrogen (N) and Potassium (K), even though the Phosphorus (P) nutrient is in surplus status.