Land elevation and slope exposition impacts on rubber wood production volume under agroforestry system

As the senile phase due and causes depeleting latex productivity, rubberwood stands can still be claimed as carbon sequestration under REDD + Scheme. This is also to maintain vegetation cover in protected forests, beside for fostering social forestry (HKm) sustainability well. Nowadays role of genetic environment factors on production have widely revealed by some researchers, but lack wood especially effect land elevation slope exposition against solar beam radiation so need research. Ordinary Least Square employed at 95% significant level, respond variable was volume per tree, whereas predictor were an-100 m above sea expositions that decomposed into 4 categories with reference compass direction between 337 0 .30’ 225.5 follow needle clock’s while three other directions westward, southwest ward, northwest ward. Air humidity temperature incorporated control model error. Data collected surveying 75 parcels HKm area Mangga Joyo located Way Kanan Regency. Parameter optimization used Minitab 16. The result suggest average: (1) increase significantly 0.02205m 3 every 100m higher elevation, (2) decrease 0.21532 which westward compare eastward one.