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Search results for , issue "Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan" : 6 Documents clear
PENDUGAAN VOLUME TEGAKAN BERDASARKAN JUMLAH DAN KERAPATAN TAJUK PADA FOTO UDARA Sumantri, Ishak; Haryono, Haryono; Machfudh, Machfudh
Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10953.013 KB) | DOI: 10.20886/jphh.1986.3.3.19-24

Abstract

SummaryThe relationship description of stumpage  volume  over the crown densities and number of crown which is measured on serial photos  are the object of this study.  The study  was conducted  research take at a tropical rain forest  which have been harvested  by using the Indonesia  Selective Cutting  (TPI) system  in East Kalimantan.   The model  analysis reveals that:1.    The distribution  of crown densities (%) and number  of crown data are normally  distributed.2.   The relationship  of stumpage  volume  over the crown densitys percentage  and number  of crown can be expressed as: V   =    -169.  7132 + 3.8514N  + 2.8532  + 0.0004C2    + 0.014CNWhere:    V  :  Stumpage  volume,  (m3)N   :  Numbers  of crown,  unitlessC   :  Crown, densitys,  %.Coefficient  of determination  (R)   =   0. 7828. This model  is significant  at 95%   level after  tested by F-test.3.   The model  and its analysis only valid in East Kalimantan.
SIFAT ARANG EMPAT JENIS BAMBU Syahri, Tjutju Nurhayati
Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12529.176 KB) | DOI: 10.20886/jphh.1986.3.3.7-12

Abstract

Studies on the properties  of bamboo  charcoal processed  by destructive  distillation  has been conducted.  Four different  species of bamboo have been selected,  i.e. andong  (Gigantochloa vertivillata  Munro),  ater (G. ater Kurz),  tali  (G. apus Kusz),  and  bitung  (Dendrocalamus asper  Back), were obtained from  Kabupaten  Bogor.  The properties  of interest  are: the specific gravity, calorific value, ash content,  volatile  matter,  and  the  fixed  carbon content  on three different  parts  of bamboo  trunk  (bottom,  middle,  and top).The specific gravity and the properties  of the destructive  distillation products from  each part of bamboo  trunk  were significantly  different. The lowest part of bamboo  trunk revealed the highest yield and the highest density of charcoal. In contrast,  the yield of piroligneous ligour  gave a tendency of decreasing toward  the lowest part of bamboo  trunk; exception was found  in bamboo ater and tali, which indicated the highest content  in  the middle part  of  the trunk.All four  different  species of bamboo gave fairly  the same yield of destructive distillation products.  The average yield of charcoal, the content of piroligneous ligour , and the tar content  were 36.05,  40.58, and 6,550'/o,   respectively.The specific gravity of all four  different  charcoal were significantly  different,  the highest  was found   in ater charcoal (0. 6), and the lowest was in bitung  (0.3).  The highest ash content  was found   in bitung charcoal (7.50'/o), and  the lowest  was indicated  by tali charcoal (5. 70'/o).  The highest  volatile matter  was in tali charcoal (24.40'/o), and the lowest content  was in bitung  (/7.800'/o). The highest and the lowest fixed  carbon content  were found   in bitung (75. 50'/o) and tali charcoal (69. 80'/o ), respectively.There were no great differences  in calorific  value for  all different  species of bamboo,  with the average of 6602 ca/lg  charcoal. However, different part of bamboo  trunk indicated significantly  different  calorific  value, that is, the higher the position  in the trunk,  the lower the calorific value. 
SIFAT PAPAN BLOK DARI LIMBAH EKSPLOITASI Kliwon, Suwandi; Sutigno, Paribotro; Iskandar, M I
Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3057.271 KB) | DOI: 10.20886/jphh.1986.3.3.28 - 33

Abstract

A study on the physical and mechanical properties of block-board using core strip from 4 species of loging wastes has been undertaken and the results presented in this paper. The result shows that the everage value of block-board moisture content, density and strip density are 9.85%; 0.47 % and 0.43% respecttively. The bending strength of the block-board varies from 457.41 kg/cm2 (Jelutung) and 465.22 kg/cm2 (Perupuk) for paralel to the grain of the face and back veneer. The bending strength perpendicular to the grain of the outer veneer varies from 219. 76 kg/cm2 (Jelutung) and 418.85 kg/cm2 (Perupuk). The block-board samples which uses core strips from the 4 wood species have glue shear strength properties which complies with the Indonesian, German and Japanesse (JAS) standard, while the delamination complies only with Japanesse (JAS) standard.  
KAYU KELAPA SEBAGAI BAHAN INTI PAPAN BLOK Kliwon, Suwandi; Sutigno, Paribotro; lskandar, M I
Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11062.377 KB) | DOI: 10.20886/jphh.1986.3.3.1-6

Abstract

This report  deals  with  the  making  of  blackboard   with  coconut   wood  core and  testing  the physical  and  mechanical  properties   of  the blackboard.   The coconut  wood (Cocos nucifera)  was collected from   Banten,  (West  Java).The results, indicate that the physical properties  of blockboard  with coconut  wood core are worse than that with a mixture  of red meranti and coconut  wood core. The bending strength  paralel  to the grain of blockboard  with coconut  wood core is better  than that   with a mixture  of coconut  wood and meranti  wood,  while the properties  perpendicular  to the grain do not show  significant  difference.Only  the glue shear strength  of  blockboard   type  II  with a mixture  of  coconut  wood  and  red meranti  wood  core is in compliance  with Indonesian  and Japanesse  (JAS)  standars.
POTENSI TANIN DARI HUTAN PAYAU TARAKAN, KALIMANTAN TIMUR Sumadiwangsa, Suwardi; Ando, Yacob
Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (17209.576 KB) | DOI: 10.20886/jphh.1986.3.3.25-27

Abstract

Mangrove forest  grows  widely distributed  throughout  Indonesia,  and one of the most promising  resource is in East Kalimantan.Until recently the utilization of mangrove forest  is only for  wood,  while the bark is wasted, although  various literatures have indicated that the tanning  material found   in the bark can be a intesfactory  component  for  glue manufacture.This paper presents a survey result on the standing stock of 11 mangrove species at the Forest District of Bulongan  in East Kalimantan.   The survey was based on a 25% sampling intensity  which is jointly  conducted  both by PT Karyasa Kencana and District of Forestry at Bulongan,  East Kalimantan.   The tannin  content  of  the bark  were determined  at the Forest Product  Research and Development   Centre Laboratory  in Bogor. In  this  Province,   the  mayor   tannin  producing   mangroves   are  Bruguiera caryophylloides,    Rhizophora macronata,    and   Bruguiera gymnorrhiza.
KEMUNGKINAN PENGGUNAAN LATEX UNTUK STABILISASI BADAN JALAN HUTAN Suparto, Rahardjo S; Sutopo, S
Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): 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.1986.3.3.13-18

Abstract

Among  the many known  stabilized methods  and materials that can be applied to improve forest  road stability,  latex is thought  of as one such material  that deserves trying.   This experiment  is to asses the possibility  of  using latex as a stabilizing  agent,The fol/owing   conclusions  are in order: Latex  can be used as stabilizing  agent for  clayey soils as subgrade  material.  A  4% latex content turned out to be effective  to keep swelling,  due to soaking  in water,  within a limit of 4,3%. Degree of compaction  has no significant  effect  of swell.  Degree of  compaction  and percentage  of  latex  content  has significant  effect  on bearing capacity.  Latex  may  be recommended   as an alternative  material for  stabilizing subgrade soil in forest  road construction.

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