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Dulsalam Dulsalam
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PENGARUH INTENSITAS TEBANG BAYANG TERHADAP KELEMBABAN DAN DAYA DUKUNG JALAN HUTAN Dulsalam Dulsalam; Apul Sianturi
Jurnal Penelitian Hasil Hutan Vol 2, No 1 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2635.457 KB) | DOI: 10.20886/jphh.1985.2.1.15-17

Abstract

Road maintenance has  been generally  considered  as a  major  cost  component in  logging cost.  An  investigation on the  effect of  shade  felling  intensity  on  the  moisture  content  and  bearing  capacity of  forest road was carried  out at the PT  Wisma Lukita  forest  concession  area,  located  in South  Sumatera.  Shade  felling  at the  right and left  side of forest roads is considered to be a  factor  which  affects  roads quality.  It is said to affect soil moisture  in the forest road structure, which in  turn  affects its  bearing capacity.In this study, the  effect  of a set of five shade felling intencity levels were investigated,  starting at 21 percent up to 70 percent  with 10 percent increments. The  effect on  moisture  content turns out  to be significant, and set of  five felling intensity  levels caused  moisture  contents to vary from 8 percent  to 20 percent. The effect on bearing capacity  however, is non-significant.
FAKTOR EKSPLOITASI KAYU RAMIN (GONYSTYLUS BANCANUS MIQ) Marolop Sinaga; Dulsalam Dulsalam; Sampe Radja Simarmata
Jurnal Penelitian Hasil Hutan Vol 2, No 3 (1985): 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.1985.2.3.19-22

Abstract

This  investigation  is carried out  in the Central Kalimantan  and  West Kalimantan  areas at three logging companies. The purpose  of  this  investigation is to determine the  exploitation  factor  for  Gonystylus bancanus Miq.The  knowledge of  exploitation  factor will  help logging  companies in  the planning  and  control  of production. The exploitation  factor is the  ratio  of  stem volume utilized to the stem   volume that  actually  could  be utilized.   The latter represents  part  of  the stem  from  its lowest point  to its first  branch.  The part of stem  considered  utilized  is that part  which reached  the  log  pond   or  other  point   for  marketing.Exploitation  waste  in the areas of  the forest  companies  observed  ranges from  11.1%   to 21.2%.  This means  that  the exploitation  factor  ranges from 78.8%  to  88.9%.  The  average of  exploitation  waste  is 16.7%,  consisting  of parts  from stumps  2.9% and parts  from  stems  13.8%, and  hence  the  exploitation factor is 0.81.Exploitation  waste  can be kept  at a  minimum  by  better  planning  and  improving  skills  of  the  workers. The  exploitation  factors  among provincial  regions and logging companies  are not significantly.  Among  diameter  class, however,  they  differ highly significantly.  Therefore,  the exploitation factor reported here  should be used with great care.
KOMPOSISI JENIS KAYU YANG DIGUNAKAN DALAM KONSTRUKSI JALAN REL DI HUTAN RAWA SUMATERA DAN KALIMANTAN Dulsalam Dulsalam; Apul Sianturi
Jurnal Penelitian Hasil Hutan Vol 2, No 4 (1985): 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.1985.2.4.24-27

Abstract

Data collected consist of the diameters and lengths of wood used in railroad construction in swamp forests of ten forest companies in Sumatera, and six in Kalimantan. Railroads in the swamp forests are different in construction compared to those in the teak forests, generally requiring four layers of sleepers.  This, of course, is due to the extremely low bearing capacity of the soil little is known about the problems of this type of railroad construction, primarily with regard to the quantity of wood required.The steps of collecting data were as follow:Selecting suitable forest companies in Sumatera and in Kalimantan to be surveyed.In each forest area 20 samples of 50 m rail track sections were drawn systematically.Diameters and lengths of logs within the sections were measured according to layers.The average amount of wood used in swamp forests railroad in Sumatera and Kalimantan are respectively 142 m3/km and 188 m3/km. The volume of wood used in every km of railroad between regions are significantly different, and those among forest companies very significantly.Wood used in every km of railroad construction and for layer of sleepers vary. The average of wood used for railroad construction of the 1st and 2nd layer in Sumatera are respectively 55 m3  /km and 87 m3/km.  Those in Kalimantan consist of four layers of sleepers, i.e.:   Ist, 2nd,  3rd and 4th layer from the  top-down,  averaging 32 m3lkm, 64 m3/km, 74 m3/km and 18 m3/km of wood used per layer respectively.
FAKTOR EKSPLOITASI JENIS MERANTI DI JAMBI, KALIMANTAN TENGAH DAN KALIMANTAN TIMUR Sampe Radja Simarmata; Dulsalam Dulsalam
Jurnal Penelitian Hasil Hutan Vol 2, No 1 (1985): 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.1985.2.1.10-12

Abstract

The study was carried out in three locations  in Jambi, Central Kalimantan and East Kalimantan. The number of forest companies observed  in each location  varies  from 2 to 4 which  were randomly  selected.The study  concludes that  :The  logging waste  ranges from 16,3 %  to 24,6 % of the clear bole volume. The average logging waste is 22,2  % consists of 12,2 %  trimming waste and stumps, and 9 % defects.The  exploitation  factor  ranges from 75,4 % to 83,7 % and  the average is 0,80.  This value  was previously  used for the observed  locations.Diameter class has a highly significant effect (P<0,01) on exploitation  factor.  The  exploitation  factor proportionally increases  with  the log diameters.
PENGANGKUTAN KAYU DENGAN TRUK DI KPH BOJONEGORO DAN SARADAN Apul Sianturi; Dulsalam Dulsalam
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): 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.1985.2.2.13-16

Abstract

An observation on wood transportation by truck has been carried out in the Bojonegoro and Saradan Forest Districts.  Trucks are MercedesBenz, consistingof models rangingfrom 1970 to 1975.The annual operation days of truck at the Bojonegoro and Saradan Forest Districts are 147 and 193  days respectively. The average annual hauling capacity of trucks in Bojonegoro and Saradan is 14 964 ton­km per year and 41 145 ton­km per year respectively.The average hauling cost in Bojonegoro and Saradan is Rp.  300,­  per ton­km  and Rp.  107,­ per ton­km respectively.  This cost is broken down into the following components: Fuel, 9 percent; grease, 9 percent; spare parts,  55 percent; tyres,  23 percent; miscellaneous, 4 percent.
PENGARUH JUMLAH TENAGA PENDORONG TERHADAP KECEPATAN LORI PADA PENGANGKUTAN KAYU Apul Sianturi; Dulsalam Dulsalam
Jurnal Penelitian Hasil Hutan Vol 2, No 1 (1985): 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.1985.2.1.13-14

Abstract

This  investigation  was carried out  in the: Padangan Forest  District,  Perum Perhutani   Unit II, East Java, employing crews of  various sizes, i.e., 4, 5 and 6 men to push the loaded  lorries.Lorry  speed  is influenced   by several factor, e.g.,  slope, crew size, team-work among  crew members. The influence  of crew size  on  lorry speed  turned  out  to  be insignificant. The average  speed of lorries  are 3.3 km/hour, 4.7 km/hour,  and 4.3 km/hour with standard error of 0.7 km/hour, 0,8 km/hour and  0,9 km/hour  for  4, 5 and  6 man, crew, respectively.
VOLUME DAN KLASIFIKASI LIMBAH PENEBANGAN PADA BEBERAPA PENGUSAHAAN HUTAN DI ACEH DAN KALIMANTAN TIMUR Sampe Radja Simarmata; Dulsalam Dulsalam
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): 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.1985.2.2.17-19

Abstract

A study on volume and classification of logging waste has been carried out in several forest companies in Aceh, North Sumatra, and East Kalimantan.  Average wood waste volume at the logged over areas having diameter range from  10 to 39  cm with one meter in length or more were measured using the Brereton method.The results of this investigation reveal that:I. Logging waste volume in Aceh range from 26,46  to 29,08  m3/ha  with an average of 27,85  m3/ha.  In North Sumatra the value ranges from 22,94  to 38,66  m3/ha  with an average of 28,90  m3/ha.  It  was formed  that in East Kalimantan  the logging waste ranges from22,00  to 81,94 m3/ha with an average of 52,38 m3/ha.2. The average wood waste at felling site was higher in the forest companies in East Kalimantan.3. Logging waste consists predominantly of those classified as 10 to 39 cm in diameter with 4 m length or more.4. The average volume of logging waste classifiedas 10 to 19 cm in diameter with 4 m length of more in Aceh, North Sumatra and East Kalimantan are consecutively 17,5 m3/ha,16,9 m3/ha and 24,9 m3/ha.
BEBERAPA MACAM PERLAKUAN TERHADAP PENYADAPAN AGATHIS SPP. UNTUK MENINGKATKAN BASIL GETAH Dulsalam Dulsalam; Ishak Surnantri
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): 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.1985.2.2.10-12

Abstract

An  investigation into tapping of Agathis  spp.  using several methods has been carried out in Malang Forest District,  Unit II Perum Perhutani, East  Java,  in 1983.  The  methods are designed  to  increase resin yield per  unit time by manipulating tapping time, duration and covers and orientation.The investigation reveals that:1. Average resin production of the Agathis  spp. for  one week to two weeks times using of black and white plastic covers are respectively 9,85  gram/tree and 9,61 gram/tree. Without plastic cover the yield is 7, 76 gram/tree, shightly lower then when they are covered.2. The application of black plastic cover at tapping his significantly  increased the yield up to 26,9%  and those covered with white plastic of 23,8"7o.   In both cases the resin yield is significantly higher compared to result obtained  when tapping was carried out without cover.3. Average resin yield at tapping face  oriented to in east and west from  one to two  weeks  are 7,48  gram/tree and 11,26  gram/tree, respectively.4. The tapping face oriented to the west increases the resin yield up to 50,5%  compared with that oriented to the east.5. The average resin yield for  one and two  week are respectively 8,57  gram/tree and 9,95  gram/tree.  Duration of  tapping of  the Agathis  spp. for one and two week does not effect the production level.  Therefore 2 week tappin~ is not recomended.
Co-Authors Apul Sianturi Ishak Surnantri Marolop Sinaga Sampe Radja Simarmata Yuniawati Yuniawati