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Hariyatno Dwiprabowo
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STUDI LIMIT DIAMETER PADA SISTEM TEBANG PILIH HUTAN ALAM Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 7, No 1 (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.1990.7.1.1 - 7

Abstract

Indonesian Selective Cutting (Tebang Pilih  Indonesia) as a silviculture  system  pays  a  considerable  attention to the growth  of seedlings  and saplings in  the forests  as it is considered  to represent  the fourth generation  in the succession  of the  tropical  rain forests. However, there is some question as to how  to relate  the growth  to the detennination   of cutting diameter   limit  quantitatively   such  that  in detennining   the diameter  limit  the growth  of  the seedlings can  be. part  of  the objective  to be considered.With  regard  to  this  problem a  study was conducted  in S. Seruyan Hulu  and  S.  Jelang - S. Delai  forests, Central Kalimantan, to examine the relationship between the height  of seedlings of  meranti  species  (Shorea  spp.)  and tress basal area in several sample  plots.   The  relationship  expressed   in  a  polynomial  regression equation  then  was used  to find  the optimal  diameter  limits  with a criterion  of maximizing   the height  of the seedlings.The  study showed   that  the optimal  diameter  limit  was dependent   upon  the  trees basal area and  the distribution  of trees diameters  of the stand.
"PENENTUAN LIMIT DIAMETER TEBANG PILIH BERDASARKAN KRITERIA TINGGI ANAKAN DAN FAKTOR EKONOMIS" Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 7, No 3 (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.1990.7.3.106-110

Abstract

Indonesia  Selective Cutting System (TPI, nowTPTI) is the most widely applied  management regime in harvesting Indonesian tropical forests. It is observed that selective   cutting has created space and  canopy openings in the forest which  stimulate the growth of  seedlings and saplings of meranti species (Shorea  spp).  A study  was conducted to examine the relationship between the  seedlings  height  with  basal  area  of  trees  in several  sample  plots in logged-over forests. The relationship expressed in regression  equation then was  used  to  relate the  seedlings height to  the  cutting  diameter limit.As determination of cutting diameter limit  leads to important decision in the selective cutting,  a problem  of findine the optimal diameter limit  which maximizes the seedlings  height constrained with economic  factor  is formulated   by using nonlinear  programming.
PROSPEK PASAR SAGU Satria Astana; Hariyatno Dwiprabowo; Triyono Puspitodjati
Jurnal Penelitian Hasil Hutan Vol 9, No 3 (1991): 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.1991.9.3.115- 121

Abstract

Based  on  the demand potential,sago starch has  a good prospect in both domestic and international domestic market, sago starch will be largely absorbed by the domestic High Frutose syroupe  (HFS) industry. A new plant of  total capacity as  much as 198.600 tonnes per annum is being considered by the indonesian Government. In interna­ tional market,  the demand potential  of sago  is promising. The developing countries alone will be facing the cereai, defisit of  67 million tonnes in  1990  and 105  million tonnes in 2000.  Sago starch is expected to contribute a sizeable quantityto overcome  these defisits.         
ANALISIS KINER.IA PENJUALAN LANGSUNG PRODUK PINTU JATI (STUDI KASUS : INDUSTRI PENGOLAHAN KAYU JATI CEPU) Caslam Caslam; Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 12, No 4 (1994): 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.1994.12.4.140-144

Abstract

This study is aimed to analyzing direct selling performance of leak door processing of Perum Perhutani in  Cepu.Performance of direct selling policy of the corporate can be measured by the capability in profit making,  the rate of growth of total assets, control of market share,  and capability 10  be survived in short or long runs.The result of Break-even Point (BEP) analysis of Cepu teak wood processing industry shows that the selling revenue of teak door product is lower than BEP,  or it is only 43,49 %.   It shows that direct selling policy  was unfavorable for  marketing strategy of leak door product.  Further analysis shows that through direct selling the realization of teak door product sale was far  below the selling plan,   i.e. only 84. 70 % of the volume and 15.30%  of the price targets, respectively.
PENGAWASAN ADMINISTRATIF TATA USAHA KAYU DI TPK DAN LOGPOND HPH DENGAN PROGRAM KOMPUTER Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 10, No 4 (1992): 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.1992.10.4.42 - 56

Abstract

Ministry of forestry requires the forest  concession holders  to fill in   logs  administrative forms  containing  log records  to supervise Iogs  production and circulation  in forest  concessions. However, large .amount  of logs produced  has prevented  the provincial  forest  service and forest  district from conducting through examination on the documents turned in by concessionaries.In this study, a computer program intended to help accomplishing the task is created and tried out documents that must be filled  in at logyard and logpond of concession. Using simulated  logs data the program run on PC could find  some deviation in the documents presented in terms of logs statistics. 
PENGAWASAN ADMINISTRATIF TATA USAHA KAYU DI TPK DAN LOGPOND HPH DENGAN PROGRAM KOMPUTER Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 12, No 2 (1994): 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.1994.12.2.89-95

Abstract

Ministry of forestry requires the forest concession holders to fill in logs administrative forms containing log records to supervise logs production and circulation in forest concessions. However, large amount of logs produced has prevented the provincial forest service and forest district from conducting through examination on the documents turned in by concessionaries.In this study, a computer program intended to help accomplishing the task is created and tried out documents that must be filled in at logyard and logpond of concession. Using simulated logs data the program run on PC could find some deviation in the documents presented in terms of logs statistics.
OPrlMALISASI EKSPOR KAYU LAPIS INDONESIA: (Studi Kasus Pabrik Kayu Lapis di Propinsi Sumatra Selatan) Satria Astana; Hariyatno Dwiprabowo; Kirsfianti Linda
Jurnal Penelitian Hasil Hutan Vol 8, No 5 (1991): 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.1991.8.5.167-180

Abstract

•Of the forat  pfoductt in •rndonei~,. plywood haa an •im~rlant  '1olitio1'•in mee~•the  need for•t~   f~reiln, ~• By the end of 1986. the contribution of plywood to the tQ.tal export value of forat  pro~ucta ~the     brggest.It accounted for 61. 40~  In the (Qllowingyea.r., the a.,erage gr:owthper. ye~r.of  the•pbwood  expor.t volume was 54.98_%. .          .                                                                                   : The a.im •of  thia atudy   ~  to •know   how far   the a~tual value• of. the plywood  export  aB the fore'!n exchange •Im reached the optimum.  To achieve the aim, two modelB (Model• I and Model II) of linier 11rograming were conatrueted. In •    thia caae, the study   waa conducted on the plywood  mill• in South Sumatra Province.                •                                                                                                                    •The rault   of  the study  revealB that the actual ualue of the plywood  export of thia region has not been optimum. The actual value of the export per month  waa USI 3 342 778 or USI 286. 1/m3. Meanwhile the export ~ue    per month based on the optimizing model of Model I and Model II iB  UBI 4 297 269 or US$'824.  9/m3 and UBI 4 537 673 or UBI 343. 2/m3  respectively.                                                                                                         To reach the optimum  value of export the market area and the export volume• need to be reallocated;tJn increasein volume export  by 1.35%  (Model I) or by  1.04'*'  (Model II) can cause a significant incre•e  in the export value comj'JtJl"ed with the ualue• gained by  the mill.Since the demand of  the Indonesian plywood  export iB prone to increaae, the reault of the optimizing modeZ. can be implemented. However, the optimizing reault of Model II iB preferred particularly with regard to the efficiency of f!&e forest re1ourceuse.
ANALISIS SOSIAL-EKONOMI ROTAN TANAMAN DIJAWA Setiasih Irawanti; Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 14, No 9 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1996.14.9.388–403

Abstract

Sebagian besar atau sekitar 95% bahan baku rotan untuk keperluan industri barang jadi rotan di Jawa berasal dari hutan-hutan alam Luar Jawa. Sejak tahun 1983 Perum Perhutani telan mengadakan rotan tanaman pada areal hutan produksinya. Untuk meningkatkan manfaat hutan, penanaman rotan dapat memberikan suatu alternatif pemecahan.Studi ini dimaksudkan untuk memberikan hasil analisis sosial-ekonomi terhadap penanaman rotan untuk melihat manfaat ekonomisnya dengan data hasil survei lapangan dan data sekunder. Analisis dilakukan meliputi pendapatan pekerja pada berbagai kegiatan penanaman dan kontribusinya terhadap pendapatan total keluarga pekerja, biaya produksi rotan tanaman dan kriteria finansial rotan tanaman.Hasil studi menunjukkan bahwa pendapatan pekerja pada kegiatan perkecambahan adalah Rp Rp 65.000,- – Rp 285.000,- dalam satu bulan, namun kegiatan ini hanya berlangsung selama sebulan dalam satu tahun. Pendapatan ini memberikan kontribusi sebesar 6-26% terhadap pendapatan total keluarga pekerja. Pada kegiatan persemaian, pendapatan pekerja dapat mencapai Rp 65.000,- per bulan atau 56% dari pendapatan total keluarga dan kegiatan ini berlangsung sepanjang tahun. Dalam kegiatan penanaman, pendapatan pekerja rata-rata adalah Rp 81.000,- per bulan atau 17% dari pendapatan keluarga. Kegiatan berlangsung selama 3 bulan dalam setahun. Hasil analisis finansial terhadap tanaman pinus menunjukkan pendapatan bersih kepada perusahaan sebesar Rp 9.430.866,- per ha dengan daur 25 tahun dan tingkat lRR 15,05%. Jika dicampur dengan tanaman rotan maka pendapatan bersih mencapai .Rp 13.256.753,- dan lRR 16,36%.Hasil ini menunjukkan bahwa penanaman rotan dapat membawa manfaat sosial bagi masyarakat sekitar hutan dan pendapatan tambahan bagi perusahaan sehingga penanamannya perlu ditingkatkan untuk meningkatkan manfaat hutan
PERANAN PAJAK DALAM PENGATURAN EKSPOR HASIL HUTAN Setiasih Irawanti; Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 12, No 4 (1994): 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.1994.12.4.150-155

Abstract

Being concerned with forest resources sustainability due to its extraction speed, Indonesia government tried to restrict forest products export by export bans during 1970s until the midle of 1980s, and by raising of export taxes since the end of 1980s.Export tax is one of government revenue sources. Indonesia government revenue from export tax is relatively small, it only accounts for 0,04% of the total government revenue , or 0,07% of the total revenue out of oil and gas.The more the development of the country, the higher thr governmnet’s revenue from income tax, firm tax, wage tax, and value added tax, and the more the government’s dependency on domestic sources. On the other hand, presently export tax revenue is relatively low. Indonesia government revenue from export tax is important, because the revenue from other taxes is small relatively.The higher the export tax rate, it will impose more restriction of forest products export flow. Statistically, at 99% confidence level, the increase of sawn timber export tax at the end of 1989 has given significant influence on the decrease of sawn timber export volume. Taxation policy is an effective instrument for allocation of forest product resources.Forest product export ban is one of non-tariff barrier, in which repleased by export tax policy is in accordance with GATT agreement. Levying of forest product export tax is a real measures of Indonesia government in executing sustainable development. As a tariff barier, axercising forest product export tax is a real measures of Indonesia government in executing sustainable development. As a tariff barier, exercising forest product export tax is not contrary to the consensus in international trading order.
ANALISIS KINERJA PROYEK UPSA SEBAGAI SUATU STRATEGI REHABILITASI LABAN KRITIS DI DAERAH ALIRAN SUNGAI SOLO, JAWA TENGAH Hariyatno Dwiprabowo; Kirsfianti Linda Ginoga
Jurnal Penelitian Hasil Hutan Vol 13, No 4 (1995): 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.1995.13.4.132-143

Abstract

This report reviews the role of UPSA project as a strategy for rehabilitation of critical land in Solo Watershed Area, Central Java. In particular, status identification of critical land and UPSA's performance, are examined. UPSA (Unit Percontohan Sumberdaya Alam) or demonstration plot for natural resources sustainability, is funded and managed by Directorate General of Reforestation and Land Rehabilitation, Ministry of Forestry, through Sub Centre for land Rehabilitation and Soil Conservation of Solo (Sub Balai Rehabilitasi Lahan dan Konservasi Tanah, Sub BRLKT Solo).Based on critical land status, the main critical land found in research site is hydrologically critical (80,5%), followed by productively critical (19,5%). The status is determined qualitively based on information gained from the field.The technical performance of UPSA was reviewed on the basis of three criteria, i.e., pro- ductivity, sustainability and equitability. The indicators examined suggested that productivity had been enhanced, though not the case for sustainability. UPSA appears to be profitable for participating farmers. Although the actual surpluses gained by some farmers are not very high.
Co-Authors Caslam Caslam Kirsfianti Linda Kirsfianti Linda Ginoga O K Karyono Satria Astana Setiasih Irawanti Triyono Puspitodjati