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Search results for , issue "Vol 6, No 7 (1990): Jurnal Penelitian Hasil Hutan" : 7 Documents clear
STUDI PERBANDINGAN SIFAT MINYAK KAYU CENDANA SEMUT (EXOCARPUS LATIFOLIA R.BR.) DAN CENDANA WANGI (SANTALUM ALBUM L.) Wiyono, Bambang; Silitonga, Toga
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 | Full PDF (3389.201 KB) | DOI: 10.20886/jphh.1990.6.7.443-446

Abstract

The  purpose of  this  research  is  to  compare the  oil. properties of  cendana   semut (Exocarpus latifolia R.Br.) and cendana wiangi (Santalum album  L.). The sandalwood   oils are obtained by  distillation   method   with  cohobation system for  18 hours.Results indicated that  the  essential  oil content of  cendana  semut is lower than  cendana wangi. The cendana semut oil had dark-yellow in colour and slightly thicker.   During the  early  stage  of  distilling  process, the  distillate of cendana semut some whitish  sediment  was formed, presumably consisted of resin. Such  sediment was not found  during  the distilling of  cendana wangi.  The  cendana  wangi oil had yellowish appearance and its viscosity was lower than that of cendana semut. Ester number  after acetylation and total  alcohol content (as santalol) of  cendana  semut oil was lower  than  of cendana wangi  oil.   Colour,  viscosity, and  resin content in  the distillate could be used to differentiate    cendana  semut from  cendana  wangi oil.
BAGAN PENGERINGAN BEBERAPA JENIS KAYU HUTAN TANAMAN INDUSTRI Basri, Efrida
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 | Full PDF (3902.918 KB) | DOI: 10.20886/jphh.1990.6.7.447-451

Abstract

This paper  describes  a  kiln  drying  experiment  of  wood,  with several species  that proposed  as industrial  timber  estate. There  are  eight  species  were  investigated five of  which taken from natural forest, while the  others  are from  plantation. The  experiment  was conducted in  two stages,  quick drying  tests in an electrical oven  and  actual  drying  in two small dry kilns. Result of quick drying tests are rough kiln schedules and the  schedules  were  tested  in  the small  kilns.Drying  properties of  wood  taken  from  natural   forest  are practically   similar  to  those  of plantation stands, Tengkawang, begontoi, kuntui, damar mata kucing and jeungjing   have  the  same kiln  drying  schedule.
PEMANFAATAN LIMBAH LIGNOSELLULOSA UNTUK GAS BAKAR DENGAN METODE FERMENTASI Syahri, Tjutju Nurhayati
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 | Full PDF (7337.821 KB) | DOI: 10.20886/jphh.1990.6.7.452-458

Abstract

The gasification of  lignocellulosic waste  was conducted by fermentation method at  thermophilic condition  (45 -55°C).  The  material  was  obtained   from vegetable  market  at Bogor.  The gasification trial  made  in pilot  scale reactor  of having  capacity  of 30 m3 and equipped with gas holder of 50 m3, steam boiler of 50 kg/h and dual generator  of  17.5 kVA. The waste  was cut first become 1-3 cm  long on choper  of  0.3  m3/h  volume. Parameter  of  fermentation  choosed  on 10 m3  volume  actif  and  retention time  was 20.9 daysThe result revealed that  thermophilic fermentation of waste which had total solid about 22.3 % and ash about 33.9 % and  feeding about 478 kg fresh  waste per day produced   biogas about  28.7 m3 per day  on methane  content about 54.5 %, productivity  about 2.9 m3  per  m3  reactor per  day  and  efficiency  of  conversion  about 57  %.The total  of  fuel  consumption  along fermentation   per day was 4.34 hours of man hours  work  about  1.16 MJ and it was   from 1 tube  LPG  of  12.5 kg and  14.31 diesel. LPG  was used for  steam  boiler can  be changed  with  31.2 m3 biogas per  day. In  this  case the production of  biogas per day cannot be dropped for  the  total  of  fuel  consumption   even  steam boiler.  The  fermentation  of 22965  kg wet lignocellulosic   waste produced  gas bio about  1380 m3 and wet  residu for compos raw material  about  16430  kg. The  biogas production  was equavalent  with  44 LPG  container of  12.5 kg.
ANALISIS PENDAPATAN PETANI TUMPANGSARI DI KESATUAN PEMANGKUAN HUTAN BOJONEGORO Abdurachman, Akub J
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 | Full PDF (9798.087 KB) | DOI: 10.20886/jphh.1990.6.7.431-442

Abstract

Taungya farming system  has given peasants an opportunity to produce some food  without  getting  involved in forest planting  activities. It is not only  cheap, but also very  attractive to peoples around the  forest. This report was a result of data processing of  peasant's income  in  taungya   farming  system in Bojonegoro Forest District, East Java,   early in 1986.The total peasant's income consists of taungya farming income, other forest  activities  income,  and  income  of  non forest   activities.  Generaly,  the share of each  type  of income    to the average total  peasant's income per year is concecutively 36.8 % (Rp 57,381) of  taungya  farming income;  26.9 % (Rp 41,976) of  other  forest  activities  income  and  36.3.   % (Rp 56,473)  of  non  forest  activities  income.The proportion of  taungya  income to  total  income  of  lnmas peasants (55.8%) is higher  than  Non-Inmas  peasants (21.8%); whereas  peasants working on a low site  quality    have proportion of taungya income to total income, 12.3%, which is lower than those  working  on a  site  with  higher  quality (50.1%).In fact, peasant's income that resultfrom forest activities, especially taungya   farming  still  could  not  cope  withtheir  poverty.   Average   total  income   of  peasants is  Rp  50,814 per capita  in  a year or only 77 % of  the minimum living standard  cost  only.   Nevertheless,  the  average   total  income   of  peasants  had good  distribution,   as far as it is concerned  this would  not  cause an alarming  trouble   to  the  social   community. 
BEBERAPA ASPEK GEOMETRIKA JALAN HUTAN DAN HUBUNGANNYA DENGAN EROSI TANAH Tinambunan, Djaban
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 | Full PDF (6936.095 KB) | DOI: 10.20886/jphh.1990.6.7.411-419

Abstract

A  study  on  the  forest road geometrics in  relation   to  the  process  of  soil  erosion  was  carried out  at four  logging companies in Kotawaringin Timur, Central  Kalimantan   in 1988. Road geometric aspects  measured  in the  field  are those related  to the  Universal Soil Loss Equation factors  such  as road openings, surfaces,  slopes,  ditches,  culverts,  cuts,  fills,diversion  ditches,  and  the  incidence   of  vegetation.The result  shows that  forest road geometrics are in the condition of  high potentials   for  soil erosion.  Factors  that caused  this  problem,  as  identified   in the  field,  are: long and steep slopes, wide ground  openings, and bare soil surfaces, in addition to the  originally  sensitive  to erosion  soil  type,  an.d hot  and  wet  weather.The concessionaires and  Indonesian Government  have  not  given  proper  attention  to  the  seriousness  of  this  soilerosion  yet.  Qualitatively  we know   that  the  erosion  level  is high  but  quantitatively  we  do not know  the value yet. Therefore, further study is necessary.
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

Abstract

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.
ANALISIS KIMIA 18 JENIS KAYU KURANG DIKENAL DARI JAWA BARAT Pari, Gustan Pari
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.1990.6.7.426-430

Abstract

This paper  deals with  chemieal  analyses  of eighteen  lesser known  wood  species from West Java. The analyses  comprise of  the determination of holocellulose, cellulose,   lignin, pentosan, moisture content, ash. content, silica content and  the solubility in cold  water, hot  water, one percent of sodium hydroxide and alcohol  benzerui extractiue. These   analyses  were conducted  to  determine their  basic characteristics  and  ultimate uses of  the  wood.              The result  shows  that  holocellulose content   ranges from  52,45 - 73,69 percent,   cellulose  from  42,87-58,54 percent, lignin from 20,0 - 31,42  percent,  pentosan from   12,09  - 18,46  percent, moisture content   from 6,84 - 18,62 percent, ash  content from 0,23  - 1,92   persent, silica content   from   0,11 - 0,74 percent. The  solubility in cold  water ranges  from  0,80 - 8,57 percent, hot  water  from  0,84 - 9,64 percent, in one percent sodium hydroxide   solution from 9,07 - 30,34  percent and  in alcohol  benzena (1:2)  from  0,99 - 11,49  percent. Based on chemical analyses, especially the  cellulose  content,  the  18  lesserknown    wood  species  from West  Java  are suitable  as raw material  for pulp  and paper  industry.

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