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PENGARUH PENYARADAN TERHADAP KERUSAKAN TEGAKAN TINGGAL PADA BERBAGAI TINGKAT KELERENGAN Dulsalam Dulsalam; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 5, No 5 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

An investigation or the effect of skidding to residual stand damage on several slope degrees has been done at PT Sumpol Timber in South Kalimantan in 1987. The purpose of this investigation is to seek information on the residual stand damage caused by skidding on several slope degrees. The investigation took place in three different slope degrees: i.e.: 0 - 20 %, 20 - 40 %, and > 40%. Sample plots were selected with completely randomized design.Results of this investigation are concluded as follows :Skidding has caused part of the residual stand to damage.The residual stand damage caused by skidding ranges from 10 Trees/ha to 70 trees/ha (from 6 % to 29 %) with an average of 30 trees/ha (15%) with standard error of 3,60 trees/ha. The residual stand damage caused by skidding on : a. 0 - 20 % slope ranges from 10 trees/ha to 50 trees/ha (6 – 18%) with an average of 23,3 trees/ha (11 %). b. 20 - 40 % slope ranges from 10 trees/ha to 70 trees/ha with an average of 30 trees/ha (15 %). c.Greater than 40 % slope ranges from 20 trees/ha to 70 trees/ha (from 10 % to 29 %) with an average of 38 trees/ha (19 %).The result of Least Significant Difference (LSD) test on the data revealed that the residual stand damage between 0 - 20% and > 40% slope differs significantly at 95% level. The higher the slope degree the greater the residual stand damage took place.It is therefore sugessted that skidding on 40 % slope degree or more be done with great care in order to decrease the residual stand damage

STUDI KASUS PRODUKTIVITAS DAN BIAYA ANGKUTAN DENGAN TRUK ISUZU DI DUA HAK PENGUSAHAAN HUTAN DI SUMATRA BARAT Dulsalam Dulsalam; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 6, No 1 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1989.6.1.6 -11.

A study on productivity and operating cost of Isuzu TWD 20 (1979 model) trucks has been carried .,out at two forest companies in West Sumatra. The result shows that : 1. The average hauling productivity at PT Ragusa Ltd and PT Pasar Besar is 113 m3 km/hour and 211 m km/hour,respectively.2. The average operating cost at PT Ragusa Ltd and Pasar Besar is respectiuely Rp. 93,-/m3 km and Rp. 57, /m3 km.

CARA PENGUSAHAAN HUTAN NIPAH (Nypa pructicans) DI BATU AMPAR KALIMANTAN BARAT Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 13, No 4 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1995.13.4.153-161

Nipah (Nypa fructicans) is a species of the Palmae family which grows on swampy areas, coastal mid along bankriver. It is commonly known that the tree is able to produce so called nira (fruits) which can be used for sweety material.The utilization and development of wild nypa forest as sweety material has been done by PT Milatronika Karya Nypah Indonesia in Sponti Jaya nypa forest, Sub District of Batu Ampar, Pontianak. In order to produce some amount of nira from nypa, tending and special care particularly to the fruit stems are required. The nira processed into redish sugar, ant sugar, cristle sugar, acid and fresh drinking water is obtained through cutting of the fruit stem.The red fructosa of nira has a composition as follows : sucrose 83, 67 %, reduction sugar2.72 %, total sugar 90,57 %, carbon 4,57 % and The rest in the form of parfume (nipa specific).the other benefits of nypa forest utilization are to create employment and regional development.

PRESTASI PENGEMUDI TRUK ANGKUTAN DI SUATU PENGUSAHAAN HUTAN DI KALIMANTAN BARAT Dulsalam Dulsalam; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 6, No 7 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1990.6.7.420-425

An investigation on logging truck drivers performances was carried out at a logging company in West Kalimantan in 1988. Seven logging truck drivers were observed using seven Nissan TZ 50 semi-trailer logging trucks (made in 1979). The purpose of this investigation is to find out logging truck drivers performances necessary for logging companies to plan their employment in hauling activity. For this purpose, the investigation was done through work time study. The investigation comes to the following conclusions : PT Duadja II employs several logging truck drivers having various skills. Nissan TZ 50 semi-trailer logging trucks are used to transport logs from the forest to log pond.Average performances of A, B, C, D, E, F, and G logging truck drivers were 765.79, 695.85, 652.56, 843.31, 745.07, 709.20, and 759.18 m3km/hour, respectively.The performances among logging truck drivers were significantly different due to the differences in load volumes and logging truck speeds as well as drivers' age and education levels.

KAJIAN PENGELUARAN DAN PEMUATAN KAYU DENGAN ALAT EXPO-2000 YANG DISEMPURNAKAN Wesman Endom; Sukanda Sukanda; Yayan Sugilar; Hasan Basri
Jurnal Penelitian Hasil Hutan Vol 24, No 5 (2006): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Dalam upaya mengatasi kesulitan mengumpulkan kayu-kayu hasil tebangan di daerah curam dengan cara manual, diperlukan terobosan berupa penyediaan alat ekstraksi kayu yang tidak mahal, mudah dioperasikan, produktif dengan biaya operasi dan perawatan rendah. Sesuai dengan harapan itu dilakukan kegiatan penelitian uji coba pengumpulan kayu dan muat bongkar dengan menggunakan hasil rekayasa alat Expo-2000 di daerah hutan Resort Polisi Hutan (RPH) Ciguha, Kesatuan Pemangkuan Hutan (KPH) Sukabumi, Jawa Barat.Produktivitas yang dicapai dengan dilakukannya penyempurnaan berupa penambahan endless drum diperoleh hasil sebesar 5 m3.hm/jam dan untuk muat/bongkar 50 m3.m/jam. Dengan biaya investasi sebesar Rp 100 juta, maka dengan biaya pemilikan dan pengoperasian alat berdasarkan perhitungan adalah sebesar Rp 60.175 per jam, sehingga biaya pengumpulan dan pemuatan kayu secara berurutan masing-masing adalah Rp 12.305 per m3.hm dan Rp 1.135 per m3.m. Biaya ini jelas lebih efektif dan efisien dibanding cara konvensional yang besarnya mencapai masing-masing secara berurutan Rp 35.000 dan Rp 15.000 per m3 .

PENGARUH JARAK SARAD DAN VOLUME KAYU YANG DISARAD TERHADAP PRODUKTIVITAS TRAKTOR PENYARADAN Dulsalam Dulsalam; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 8, No 3 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1990.8.3.83 - 87

An inveatigation on the effect of alcidding diatance and •kidded log volume on the productivity of kidding tractor um carrkd out at a forest company in Jambi in 1986. Caterpillar D1 G trac~ors were elected randomly and their working time and skidded log volume were obaervedthrough work time atudy. The purpoH of thia invatigation ia to find out the effect of kidding diatance and skidded log volume on the productivity of kidding tractors. The invati1Qtion coma to the fotlOwing concluaioru. 1. The owrace of skidding diatance wa 8.24 hm with standard error of 0.2tJ66 hm while the average of idded log volume IDOi 9.08 m8 with. 0.3173 m3 atandard error. J. The a~ productivity of skidding tractor waa 92.09 m8 hm/hour with atandard error of 6.8406 m8 hm/hour.3. The Niationahip between tractor productivity (Y) and •kidding diatance (X 1) and kidded log volur.ne (X2) can beupraaed in the li~ r.nultipie Ngreuion: Y - 48.1670 + 16.0704X1 + 9.6176 Xa with R2 • 0.71604. The effects of kidding diatanca and •kidded log . voluma on the productivity of •kidding tracton are aigniffcant.TM tractor productivity increaaedproportionaUy when the •kidding. diatance and •kidded• log volume increaed. It therefore recommended to make the •kidded loga as long as poaible GI far GI the tractor can handle.

FAKTOR KOREKSI VOLUME DOLOK YANG DIUKUR DI SUNGAI (LOGPOND) (Correction factor of logs volume meaured in logpond) Wesman Endom; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 11, No 4 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Measuring the volume of logs which have been rafted on the rivers is very difficult. The difficulty is mostly in measuring the average top and bottom diameters of logs because the largest portion of logs are inside the water.In this paper, the results of measurements carried out both on the ground and in the river are described. Lately, log measurement in the river is necessary because:a. Volume of logs sent to industries would be measured in the river.b. Many logs of the illegal cutting found are rafted in the river.The observation reveals that :1. Volumes of logs measured on the ground and in the river are significantly different.2. From the sample of 60 logs of Dryobalanops spp. it is found that the total volume measured on the ground is 273,18 m3, while the total volume measured in the river is 262, 76 m3. The total difference is 10,42 m3 or 0,04 m3 per_m3 in average.3. the correction factor (FK) then is 0,04 m3 per m3 or 3,81 %. It means that the volume of log measured in the river is smaller than the volume Measured on the ground. Therefore, the volume measured in the river should be multiplied with the correction factor of 1.04 to obtain the real volume as measured on the ground.

KERUSAKAN TEGANGAN TINGGAL AKIBAT PENYARADAN DENGAN TRAKTOR PADA BERBAGAI TINGKAT KERAPATAN TEGAKAN Dulsalam Dulsalam; Sukanda Sukanda; Ishak Sumantri
Jurnal Penelitian Hasil Hutan Vol 6, No 6 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

An investigation on residual stand damages caused by skidding tractor on several stand density levels was carried out at PT Sumpol Timber in South Kalimantan in 1987. Forty five sample plots were selected randomly in this research. The purpose is to gather information about the resdiual stand damages caused by skidding tractor on several stand density levels. The result of investigation reveals that : 1. The number of trees having diameter of 20 cm and up varies from 80 to 300 trees/ha with an average of 190.22 trees/ha. 2. The residual stand damages for the area with stand densities ot < 150, 150 -199, and > 200 trees/ha were 16, 7, 28.3,and 39. 0 trees/ha, respectively. They are significantly different.3. It is suggested that the skidding operations, especially in high stand density levels, be done with better planning in-order to save powers, costs and resources.

PRODUKTIVITAS TRAKTOR CATERPILLAR D7G DI SUATU PERUSAHAAN HAK PENGUSAHAAN HUTAN DI JAMBI Dulsalam Dulsalam; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 6, No 6 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

An investigation on the productivity of D7G Caterpillar tractors was carried out at a forest company in Jambi in 1985. Three tractors were selected randomly to be observed. The productivity of these tractors was collected through work time study. The purpose is to find the productivities of D7G Caterpillar tractors so that this information can be used by forest companies in planning skidding operations. This investigation results reveal that : 1. D7G Caterpillar tractors can be used to skid logs at dryland forests having easy and moderate topographies. At skidding distances ranuine from 75 - 535 m with an average of 324 m these tractors can skid logs having volumes ranging from 5.01 - 16.88 m3/trip with an average of 9.08 m3/trip.2. The average productivities of A, B and C skidding tractors were 59.22, 89.81 and 123.69 m8. hm/hour, respectively.The productivities among tractors were significantly different due to different skidding distances, tractor conditions, driver skills, average stund volume per ha, soil conditions, skidded log volume and topography. The average produc- tivity of the three tractors was 92.09 m3 hm/hour.

KAJIAN PENGGUNAAN KAPASITAS TRAKTOR KOMATSU D85E- SS DALAM UPAYA PENINGKATAN PRODUKTIVITAS PENYARADAN Wesman Endom; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

This research was aiming at indentifying the tractor skidding capasity in logging operation in the natural production forest. The tractor observed was Komatsu D85E-SS. and in this study the specific gravity of 0.8 for all species was assumed.The results shows that the capasity of skidding was about 14. 7 ton or equal to 18, 40 m log. However, it was found that from 52 observations, 8% were done under the 20% capacity, 42% of the skidding were done under 21-40% capacity, 25% were done under 40% capacity and 8% were done by winching. .Those figures indicate that the skidder capacity has not yet fully utilized. Therefore, the possibility to increase the volume of skidding is widely open, meaning that the logging wastes can be overcome by skidding those above clear bole parts together with the main log.The cost of skidding per m3 compared with 20 years ago was found to be three times higher. The cost skidding per m3 was about Rp. 3225,- at the averege distance of 3,16 hm.

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