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Jurnal Penelitian Hasil Hutan
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Articles 4 Documents
Search results for , issue " Vol 6, No 7 (1990): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
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 | 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 | 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  peasants income  in  taungya   farming  system in Bojonegoro Forest District, East Java,   early in 1986.The total peasants 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  peasants 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, peasants 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.

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