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Jurnal Penelitian Hasil Hutan
Published by Pusat Penelitian dan Pengembangan Hasil Hutan
ISSN : 02164329     EISSN : 24428957     DOI : 10.20886/jphh
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal Penelitian Hasil Hutan adalah jurnal ilmiah nasional yang mempublikasikan tulisan yang telah dicermati oleh Dewan Redaksi dan Mitra Bestari di bidang hasil hutan. Tulisan dalam Jurnal Penelitian Hasil Hutan mencerminkan inovasi dan hasil penelitian dasar dan terapan yang berkualitas di bidang hasil hutan. Topik tulisan penelitian hasil hutan meliputi: 1. Anatomi bahan berlignoselulosa 2. Sifat fisik dan mekanik bahan berlignoselulosa 3. Teknologi serat bahan berlignoselulosa 4. Papan komposit bahan berlignoselulosa 5. Biodeteriorasi dan pengawetan bahan berlignoselulosa 6. Teknologi pengeringan hasil hutan 7. Penggergajian dan pemesinan kayu 8. Pengolahan hasil hutan kayu dan bukan kayu 9. Pengolahan kimia dan energi hasil hutan 10. Ilmu kayu dan teknologi hasil hutan Keteknikan hutan 12. Pemanenan hasil hutan kayu dan bukan kayu
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Kehutanan
Articles 6 Documents
 1 
Search results for , issue "Vol 2, No 1 (1985): Jurnal Penelitian Hasil Hutan" : 6 Documents clear
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 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.
PENGARUH CARA EKSTRAKSI TERHADAP SIFAT FISIKA DAN KIMIA SAGU R Sudradjat
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.1985.2.1.18-21

Abstract

The aim of this investigation is to evaluate  the effect of extraction methodes on physical  and chemical properties  of sago. Extraction  methodes  comprise  of  fermentation,  mechanical, and  traditional.The result indicated that sago yield varies from 20,19%  - 40,12%, acidity  0,89 - 0,98,  moisture  13,39% -14,29%, ash 0,15%  - 0,32%, protein 0,38%  - 0,46%, crude  fiber 0,27%  - 0,31%,  fat  0,17%  - 0,23%  and amylum  72,64%  - 88,12%.Mechanical  extractions  gave  the  highest  yield  and  amylum  content. Fermentation  methode  show more  acid  than traditional.  The traditional  methode presents the  highest ash content. This included that the mechanical methode  seemed to be preferable   for  commercial application.
PRODUKTIVITAS ANGKUT TRUK DAN TRUK SEMI-TRAILER Apul Sianturi; Djaban Tinambunan
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.1985.2.1.1-3

Abstract

An investigation on log hauling by truck and semi-trailer truck has been carried out at 14 concession  areas in Sumatera and  5 concession  areas in South  Kalimantan in 1980  and  1981. The  investigation  comes to  the following conclussions :1.    Logging Companies in Riau, Jambi and South Sumatera  use poorly constructed forest roads without any graveling.2.    On the other  hand  those in South Kalimantan are relatively good  graveled  roads.3.    Effective  hauling  outputs of  trucks range from 91 to 361 m3km/round trip hour, with an average of 247 m3 km/round  trip hour, and those of semi-trailer  truck  from  265  to 841 m3 km/round  trip hour,  with an average of 494 m3 km/round  trip hour.There is pronounced linier relation  between hauling  distance and round trip time.
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.
VARIABILITAS KEKUATAN KAYU PADA POHON MAHONI Suparman Karnasudirdja
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.1985.2.1.4-9

Abstract

A  study  on a  variation of  bending  and compression  parallel to the grain strength  in Mahogany  (Swietenia mahogany) tree  has been  under  taken.  The material  consisted of 5  trees, each  of  which was represented by 4 bolt  taken  respectively from  near tree  base, at middle  half and  upper end of  the merchantable bole.  The test pieces  were then drawn from  each bolt  following   the  cruciform  pattern  of  the  ASTM   D14362 procedure. Using this pattern, 221  and  197  test specimens were respectively obtained  for  the  bending  and compression test.  The  result  shows  that  the  tree averages of  the  bending strength ranges from  90 - 110% of  the species  maan value, the cardinal point  averages from  100 -101% and the position within tree (bolt)  averages from  97 - 102%, As has been anticipated the tree averages are significantly different in both  the bending  and  compression strengths. Computation of the precision  of estimates  of the species  mean in term  of the probable limit  of  error (PLE) as percentage of  the species  mean  within 95%  confidence band as suggested by Pearson (1952)  indicates  an error of  9,51% and  12,44%   for  respectively the bending  and  compression   strength.  Values  of  the probable limit of error PLE were then calculated  using various combination of number of test pieces per tree and number  of  trees,  and  the result  compared   with   those  obtained   from  previous test  using  Agathis lorantifolia and  Schima  wallichii  tree species.  It shows  that  for structural and  non-structural purposes at leat 10 trees per species,  and 5-10 specimens  per  tree should  be employed   in future  strength  test in order to obtain  an error of  between  5 -10%. This is definitely an advantage  compared with  the  current  procedure.

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