Analisis Interpretasi antara Kemiringan Lahan, Hujan dan Pemupukan terhadap Produktivitas Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.) di PT. Perkebunan Nusantara IV Sei Rokan Regional III

Abstract

This study aims to analyze the interpretation between land slope, rainfall, and fertilization on the productivity of oil palm plants (Elaeis guineensis Jacq.) at PT. Perkebunan Nusantara IV Kebun Sei Rokan Regional III conducted in March 2025 to November 2025. The hypothesis of this study is that there is a significant influence between land slope, rainfall, rainy days, and fertilization on the productivity of oil palm (Elaeis guineensis Jacq.) at PT. Perkebunan Nusantara IV Kebun Sei Rokan Regional III. This study uses secondary data available in the plantation administration, including oil palm productivity data for 2015-2024, rainfall and rainy days data, fertilization data for 2014-2023 and land slope data. The analysis methods used are simple linear regression analysis, multiple linear analysis and correlation analysis. The model was tested for its feasibility using classical assumption tests including normality tests, heteroscedasticity tests, multicollinearity tests, and autocorrelation tests using the statistical tool SPSS.v.25 for Windows. The results of the study showed that rainfall partially had a significant effect on increasing oil palm productivity on flat, medium, and sloping land, while rainy days partially had no significant effect on increasing oil palm productivity on flat, medium, and sloping land. Multiple linear regression models on flat land and medium land show that rainfall and rainy days can increase oil palm productivity, while on sloping land it shows that rainy days have no effect on increasing oil palm productivity. NPK and Mg fertilization partially and simultaneously had no significant effect on increasing oil palm productivity on flat, medium, and sloping land. The multiple linear regression model of NPK fertilization on flat land shows a positive effect in increasing oil palm productivity, while Mg fertilization on medium land shows a positive effect in increasing oil palm productivity.