Yonky Indrajaya

The Study of Faustmann Formula Application in Sustainable Natural Forest Management in Indonesia

In the forest economics literature, Faustmann formula is highly adopted for profit maximization problem in forest management, mostly in plantation forest. Stylized models of Faustmann formula to be applied in selective logging regime have also been studied extensively in multi-age and multi-species forest. In general, natural forest managers in Indonesia have not adopted the Faustmann formula in their management decisions. Sustainability aspect in natural forest management is applied based on silvicultural consideration, i.e. measuring residual stand that is able to be harvested in the next cutting cycle. This study aims to analyze the application of Faustmann formula in the current selective logging regime in Indonesia (i.e. TPTI), so that the natural forest managers may gain maximum profit and sustainable. This study is a qualitative research based on literature review. The results of this study show that under deterministic growth model (i.e. matrix transition model) and robust damage model (i.e. transition matrix with different damage proportions on each species and diameter class), the Faustmann formula can be applied for selective Logging regime in Indonesia. Keywords: Faustmann formula, selective logging, natural forest, Indonesia

SPATIAL DISTRIBUTION OF CROP OF PRODUCING CAJUPUT OIL IN WASUR NATIONAL PARK

The utilization of cajaput tree species for cajuput oil production in the Wasur National Park (NP) should be supported by accurate data and information. It becomes important because uncontrolled exploitation can lead to disruption of the national park function. This study aims to determine the spatial distribution of three cajuput tree species, i.e Asteromyrtus symphyocarpa , Melaleuca cajuputi and Melalueca viridiflora existed in Wasur NP region. The results of this study showed that, in general, the distribution of those three cajuput oil species mostly in Yanggandur area. They are mainly concentrated around the Yanggandur village, Mbembi village, Wasur village and Sota village. Those species were mostly found around wamps, especially in the Sermayam, Rawa Buaya and Rawa Biru. The total area of those three species was 103,011.75 ha, which was dominated by A.symphyocarpa (8.30% of the total area of the NP), followed by M.cajuputi (8.27% of the total area of the NP) and M.viridiflora (7.03% of the total area of the NP). In general, A. symphyocarpa dominantly grow on type of Kambisol soil, where as M.cajuputi and M.viridi flora dominantly grow on soils type of Kambisol and Gleysol.