This study aimed to evaluate the growth increment (diameter and height) and identify environmental factors influencing 10-year-old walnut trees (Canarium amboinense) at the Seed Source Plot in Hatusua Village, West Seram. A descriptive quantitative method with field observation techniques was employed across a 1-hectare sample plot (3×3 m spacing) monitoring 100 sample trees. Data were analyzed using Current Annual Increment (CAI), Mean Annual Increment (MAI), and multiple linear regression. Results indicated that at the tenth year, the diameter growth reached a CAI of 2.10 cm/tree/year and an MAI of 2.33 cm/tree/year, while height growth reached a CAI of 1.94 m/tree/year and an MAI of 2.10 m/tree/year. The stand successfully progressed from the seedling stage into a productive tree phase. Among the environmental variables, soil pH and soil moisture were identified as the primary factors significantly influencing the growth of C. amboinense.
Copyrights © 2026