Forest harvest is the first activity to undertake in extracting logs from the forest site. The amount of wood wastes generated during logging operation can be used for measuring the value of exploitation factor (FE as multiplying factor in determining annual allocation of wood production (JPT) and as a basic parameter in predicting earn business provision of natural forest (PSDH). Ecological aspects may interprete that the bigger FE value will bring about reduction of forest damages. This paper examines the FE in Sub-Region of East Kalimantan. Results show that the proper FE value for the East Kalimantan Province is ranged between 0.77 -0.89. The amount of FE value is more influenced by factor of feller skills than the management competence factor of IUPHHKHA. Keywords: Exploitation factor, natural forests, reduced impact logging, Sub-Region East Kalimantan ABSTRAKDalam pemanfaatan kayu, pemanenan hutan merupakan tahap kegiatan utama yang dilakukan agar potensi pohon dapat dikeluarkan dari dalam hutan. Banyak atau sedikitnya limbah yang terjadi selama proses pemanenan kayu dapat dijadikan tolok ukur faktor eksploitasi (FE). Selama ini, pemerintah menetapkan angka FE sebesar 0,7. Padahal, paradigma pengelolaan hutan alam sudah semakin baik dengan diterapkannya pembalakan berdampak rendah (reduced impact logging/ RIL) dan/atau berdampak rendah karbon (RIL-C). Dilihat dari aspek ekonomis, nilai FE mempunyai peranan sangat penting karena digunakan sebagai pengali dalam menentukan jatah produksi tahunan (JPT) dan sebagai dasar dalam prediksi penerimaan besarnya provisi sumberdaya hutan (PSDH). Pada aspek ekologis, penetapan nilai FE yang lebih besar dapat mengurangi terjadinya kerusakan hutan. Tulisan ini mengevaluasi nilai FE di Sub Region Kalimantan Timur. Hasil penelitian menunjukkan besarnya bilangan FE di lima IUPHHK-HA di Kalimantan Timur berkisar antara 0,77 -0,89. Besar kecilnya bilangan FE lebih dipengaruhi oleh faktor keterampilan penebang dibandingkan dengan faktor kompetensi manajemen IUPHHK-HA.Kata kunci: Faktor eksploitasi, hutan alam, pembalakan berdampak rendah, Sub Region Kalimantan Timur 335
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