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Hariyatno Dwiprabowo
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KELAYAKAN EKONOMI BAHAN BAKU INDUSTRI SEKUNDER DARI LIMBAH KAYU PEMBALAKAN DI PROPINSI JAMBI (The economic feasibility of utilizatiion of logging waste for secondary industry’s raw materials Jambi Province) O K Karyono; hariyatno dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 11, No 4 (1993): 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.1993.11.4.148-152

Abstract

Raw material for the wood proccesing industries in Jambi Province, is supplied by the concessionaires in Jambi Province, as well as from other. regions such. as from Riau Province. As the number of wood industries increase raw material supply for wood industries in jambi need to be increased. To fill in part of the shortage, the uSe of logging waste needs to be encouraged.Of forest area of Jambi Province about 2,9 million ha, the amount of logging waste is estimaled around 162,118.51 cum. the amount of logging waste which have been used by some concessioners in the Jambi Province accounted for 3,83 percent This figure impliS. that logging waste utilization should be intensified, so raw material for secondary industries can be increased without necessarily to increase logging area, and it wil also save forest resurces and increase added value.Old study show that use of logging waste prpvides profit margin as much as : Rp. 6. 750,- per cubic meter for concessionaire,Rp.28.150,- for sawmill and Rp. 42.525.- for blackboard industries.
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.
Co-Authors Caslam Caslam Kirsfianti Linda Kirsfianti Linda Ginoga O K Karyono Satria Astana Setiasih Irawanti Triyono Puspitodjati