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<![CDATA[UJI COBA MESIN KABEL LAYANG EXPO-2000 GENERASI-II DENGAN KONSTRUKSI DUA GIGI EKSENTRIK TERPISAH UNTUK EKSTRAKSI KAYU ]]>
<![CDATA[Wesman Endom]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 32 No. 1 (2014): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2014.32.1.1-11
<![CDATA[Studies of timber extraction was carried out in steep areas by using the prototype Expo-2000 Generation II withengine of 13 HP. Cable line stretching of about 400 m with slope of about 50%. Logs of rasamala of 2-4 m length anddiameter ranged of 20-40 cm were extracted to landing around a tower. The machine was placed on the hill located in themiddle of two cable stretches.The first cable stretch was used for pulling logs upward and the second cable stretch for pullingdownward. The cost for machine investment was about Rp 110 millions with operation costs of Rp 111.975 /hour. Logsextraction productivity is 0.59 m /hour, and the extraction cost was about Rp 189,788 per m .]]>
<![CDATA[STUDI FAKTOR PEMANFAATAN DAN LIMBAH PEMANENAN KAYU DI HUTAN ALAM PAPUA BARAT ]]>
<![CDATA[Soenarno]]>;
<![CDATA[Wesman Endom]]>;
<![CDATA[Sona Suhartana]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 36 No. 2 (2018): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2018.36.2.67-84
<![CDATA[Timber harvesting is an important process in timber utilization because it determines the quality of log. Two important things in timber harvesting are recovery rate and residual factors. This paper identifies distribution, forms and condition of harvesting waste as well as determines utilization factors and timber residual factor due to timber harvesting. Research was conducted in two areas of forest management in Wasior and Nabire Districts, West Papua Province. Recovery rate of forest concession with Reduced Impact Logging (RIL) techniques tend to be higher than that of conventional techniques. Recovery rate ranged from 86.3–87.8% with an average of 86.9% and residual factor ranged from 12.3–13.8%, with the average of 13.1%. The average utilized wood amounted of 4.578 m3/tree from the potential clear bole of 5.293 m3/tree. The wasted volumes ranged from 0.548 to 0.664 m3/tree with an average of 0.564 m3/tree. In general, most of the logging waste was in the form of wood defects (65.1%), broken (23.3%) and firm timber waste (11.6%) which represented the lowest percentage.]]>
<![CDATA[UJI COBA REKAYASA ALAT UKUR DIAMETER POHON DI HUTAN ALAM ]]>
<![CDATA[Wesman Endom]]>;
<![CDATA[Soenarno]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 36 No. 2 (2018): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2018.36.2.101-112
<![CDATA[Trial test of tree diameter measurement device ‘wesyano’ was conducted in 2016 at a natural forest in Central Kalimantan. This paper evaluates five main components of the measurement device: roller measurement, telescopic stick, frame shaft, lid-scale meter, scale-meter, and its locker. Result on single and double measurements showed that wesyano had an accuracy of 0.98–0.99 with an efficiency level of 1–4 times faster than the phi-band measurement. Validated results indicated that wesyano was highly correlated with phi-band measurement for single (r = 0.978) and double (r = 0.982) measurements. There is no significant differences between single and double measurements. The study indicates that wesyano could be used for phi-band measurement substitute. The device was more practice, cheaper and more effective to be used mainly for forest inventory in natural forests which contain large stem diameter (≥ 50–100) and high position of buttress, (≥1.8 m) with high accuracy, efficien of and low cost.]]>
<![CDATA[PRODUKTIVITAS DAN BIAYA REKAYASA MESIN PEMBUAT SERPIH KAYU YANG MUDAH DIPINDAH ]]>
<![CDATA[Wesman Endom]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 31 No. 4 (2013): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2013.31.4.295-305
<![CDATA[A prototype mobile chipper was built to convert small logs (diameter less than 20 cm). Testing runs were undergone inthe village of Cipari, Sub District of South Sukanegara, Cianjur and Sub District of Sadang Purwakarta. Performanceof the chipper much better than the-I type which could convert the waste into chips in average capacity of about 582kg/hour. The owning and operation costs of wood chipper was about Rp 62,929/hour, with operation cost Rp 108/kg.The owing and cost operation using the type-1 prototype chipper was about Rp 249/kg. Cost analysis using rental cost Rp125/kg, the NPV is achieved at about Rp 13.209.928 with IRR at about 30%.]]>
<![CDATA[FAKTOR EKSPLOITASI PADA HUTAN PRODUKSI TERBATAS DI IUPHHK-HA PT KEMAKMURAN BERKAH TIMBER ]]>
<![CDATA[Soenarno]]>;
<![CDATA[Dulsalam]]>;
<![CDATA[Wesman Endom]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 31 No. 2 (2013): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2013.31.2.151-160
<![CDATA[In timber harvesting, exploitation factor is implemented as the one parameters to determine the allocated annual production at the natural production forest. Currently, the value of exploitation factor as stipulated by the Ministry of Forestry that applies to all conditions of natural production forest exhibits large varying-topographies and in operation tends to be beavier than tost at either the fixed production forest or convertible production forest. The situation brought about a significant difference in the exploitation factors (EF) during the timber harvesting. In average the value of EF at the Licensed Natural Forest Concessionary PT. Kemakmuran Berkah Timber reached 0.92, while the EF at flat topography (0-8) was 0.93; at moderately sloping (9-15'), rather steep (16-25), and steep topographies (26-40) were all similar, i.e. 0.92.]]>
<![CDATA[FAKTOR KONVERSI LIMBAH PEMANENAN KAYU HUTAN TANAMAN DAN RENDEMEN PENGOLAHAN SERPIH KAYU ]]>
<![CDATA[Soenarno]]>;
<![CDATA[Wesman Endom]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 34 No. 1 (2016): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2016.34.1.77-88
<![CDATA[Timber harvesting in forest plantations of PT Korintiga Hutani was undertaken using length limitation of 4.10 m and minimum diameter of 10 cm. These limitations have created numerous trunk wastes in the field. Harvesting efficiency improvement is being considered by converting the wastes into wood chips. However, the company has to pay a provision of forest resources to the government for each volumetric unit (m³) of the converting wood wastes. This paper examines conversion factors for estimating conversion values from staple meter (Sm) or weight (ton) into m³ of akasia (Acacia mangium), eukaliptus (Eucalyptus pellita) and waru (Hibiscus similis). Results show that conversion value of 1 Sm A. mangium wood waste is equal to 0.35 m³, or 1 ton of the same waste is equal to 1.98 m³; conversion value of 1 Sm E. Pellita is equal to 0.48 m³, or 1 ton of the waste is equal to 1.41 m³. Conversion value for 1 Sm H. similis is equal to 0.34 m³, or 1 ton of the waste is equal to 1.95 m³. Processing recovery of wood waste into chips is 94% for A. mangium and E. pellita while recovery of H. similis is 90%. Hence, conversion factor of wood chips in relation with the required waste is 1 Sm chips = 0.38 m³ wood waste or 1 ton chips = 2.09 m³ wood waste for A. mangium. Conversion factor for E. pellita is 1 Sm chips = 0.38 m³ wood waste or 1 ton chips = 1.51 m³ wood waste; conversion factor for H. similis is 1 Sm chips = 0.39 m³ wood waste or 1 ton chips = 2.16 m³ wood waste.]]>
<![CDATA[PRODUKTIVITAS DAN BIAYA ALAT HASIL REKAYASA DALAM PENGELUARAN KAYU JATI DI DAERAH CURAM ]]>
<![CDATA[Wesman Endom]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 31 No. 1 (2013): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2013.31.1.63-74
<![CDATA[This study deals with the trial on teak wood-log extraction on a steep terrain using skyline system. This system used a small capacity yarder machine (5.5 PK) of generation II's Expo prototype. The wood log was pulled from a tree-felling plot all theway about 50-m distance to the bill slope. As such, the yarder afforded the productivity in average 0.6263 m²/hour, implying that it was still below the targeted range (2.5-5m/bour). The investment cost reached Rp 72,000,000 or correspond to Rp 102,986/bour or Rp 156,351/ ni'. Financial analysis using the actual performance of such tool at the rents price similar to the log-extracting cost brought out negative NPV and IRR values. Such values could have been positive had the rents price been greater, equal to Rp 185,000/m².]]>
<![CDATA[KERUSAKAN TEGAKAN TINGGAL AKIBAT PEMANENAN KAYU PADA HUTAN TROPIS BERBUKIT DI KALIMANTAN TENGAH ]]>
<![CDATA[Soenarno]]>;
<![CDATA[Wesman Endom]]>;
<![CDATA[Sofwan Bustomi]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 35 No. 4 (2017): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2017.35.4.273-288
<![CDATA[One indicator of sustainable forest management is the minimum impact of residual stand damage caused by timber harvesting activities. This paper examines stand damage due to timber harvesting on hilly tropical forest, Central Kalimantan. The study was carried out using samples plot of 200 m x 100 m that was systematically placed on three selected cutting plots with different chainsaw operators working experience. Results showed that the degree of residual stands damage due to timber harvesting ranged between 19.37 – 34.9% with an average of 24.37% categorized as light stand damage. The average stands damage due to felling was 16.27% and skidding was 8.1%. Unexperienced chainsaw operators tend to cause greater damage than well trained chainsaw. Type of residual damage due to the felling on either sloping, rather steep or steep terrain was dominated by broken tree trunks. The most common type of residual stand damage due to skidding was the collapsed or tilted trees. The residual stand damage due to timber harvesting could be reduced by imposing intensive supervision in the felling sites and provide training and/or refresher to chainsaw and skidding tractor operators especially on cutting technique and environmentally friendly skidding.]]>
<![CDATA[REKAYASA DAN UJI COBA ALAT KABEL LAYANG Expo-2000 GENERASI-3 DALAM PENGELUARAN KAYU PADA LERENG CURAM ]]>
<![CDATA[Wesman Endom]]>;
<![CDATA[Soenarno]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 33 No. 1 (2015): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2015.33.1.47-60
<![CDATA[The engineering and trial testing on the skyline system tool of third Generation Expo-2000 powered by 13-HP engine was conducted to look into its performance for exstracting wood logs from the forest at steep terrain. This undertaking took place at Forestry District Resort of Tanggeung, Forestry District of Cianjur, the State-Owned Forest Enterprise Unit III, Cibatu Village, West Java. Results revealed that working productivity was 1.72 m³ of wood/hour, with the entire cost of tool ownership and wood extraction at Rp 138,587.39/hour or being equal to Rp 80,346.45/m³.]]>
<![CDATA[STUDI CACAT BATANG PADA PRODUKSI KAYU JATI ]]>
<![CDATA[Wesman Endom]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 30 No. 1 (2012): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2012.30.1.40-50
<![CDATA[This study excamined defects commonly encountered on teak logs. Defects are grouped into three categories, i.e. totaly bole, partial bole and minor defect. The study was conducted at three log collection center (IPK) in Cepu TPK Batokan, TPK Pasar Sore and TPK Cabak. Results showed that the average (%) of actual Hole Volume (HV) and Correction Value (CV) of mixed teak logs of three locations, were 18.28% (0.01-46.52%) and 0.82 (0.54-0.99). HV and CV values for were the partly holes grove of teak logs of those three locations 6.65% (0.01-23.82%) and 0.94 (0.76-0.99). The minor defect group of teak logs passessed HV and CK respectively 1.77% (0.06-14.86%) and 0.98 (0.85-0.99).]]>
