This study aims to examine the infiltration rate and soil permeability in rubber plantations with varying tree ages at PT. Waimusi Agroindah, as well as the influencing factors. The research was conducted in December 2024. The study area includes plantations established in 1990 (35 years old), 2014 (11 years old), and 2020 (5 years old). A detailed survey method was employed using a base map at…