Author Archives: admin

COMPREG MADE FROM RUBBER WOOD VENEER

Rubber wood (Heavea brasiliensis Muell & Agr.) is suggested on as a new raw material for the manufacturing of compreg to aim at a new product in Thailand.  Some factors affecting the resin retention in rubber wood veneer were examined by using the factorial experimental design (completely randomized technique). The three factors chosen were the concentration of phenol formaldehyde resin ... Read More »

QUALITY OF SAWNTIMBER ACACIA MANGIUM WILLD. FROM PLANTING BY AGRO-FORESTRY PRACTICES

Twelve logs of seven – years old Acacia mangium Willd.; which have diameter 18 -30 cm. (average 20 cm.) showed lumber recovery approximately 35.6%. There are fifty percent of heart lumber which is 0.5 – 1.5 cm. in width and average heart length 33.8 cm. per one meter. Warping of sawntimbers after air seasoning  bow, crook and twist are 3.7, ... Read More »

PRESSURE TREATMENT OF EUCALYPTUS CAMALDULENSIS POLES WITH OIL-BORNE PRESERVATIVE

Eucalyptus camaldulensis poles were treated with 50 : 50 creosote – light diesel oil mixture. The pole size round E. camaldulensis was found to contain an average of 53.85% sapwood, which is readily perishable by wood destroying organisms. Eucalyptus poles were treated by the Bethel Full-Cell process using varying pressure and duration to evaluate the effect on penetration and retention ... Read More »

SHOREA ROBUSTA GAERTN.F.(SAL) IN THE FORESTRY OF NEPAL

The distribution, silvicultural characteristic, growth rate and economic importance of S. robusta Gaertn.f., an indigenous hardwood species in Nepal, were analysed. The natural S. robusta forests in the southern plain of Nepal (the Bhabar-Terai) have been seriously degraded during the past decades. Forest inventories and trials in Nepal have revealed a good regeneration potential foe the existing S. robusta forests. ... Read More »

MARKETING OF BAMBOO CATERPILLAR (Omphisa sp.)

The study is aimed at investigating the quantity of bamboo caterpillar in natural forest, and its marketing in upper part of the northern region. The study found that the average number of clumps and calms of bamboo per rai were 28.67, and 511.67 respectively, and the average number of bamboo caterpillars whereas, with the fluctuated price of collectors which ranging ... Read More »

Species Diversity of Trees in Dry Dipterocarp Forest at Sakaerat, Nakornratchasima II. Species Number and Species Diversity Expectations from Tree Individuals

Species number expectation (E(s)) using a rarefaction technique for the 4 stands of dry dipterocarp forest at Sakaerat Environmental Research Station, Nakornratchasima, province separately and average for the 4 stands as compared to 1 stand of dry evergreen forest of the same locality and 2 stands of secondary and primary (shrine) dry dipterocarp forests at Don Pu Ta Somdet province ... Read More »

LITTERFALL PRODUCTION IN A PRIMARY MANGROVE, Rhizophora apiculata FOREST IN SOUTHERN THAILAND

Litterfall production and nutrient concentration of litterfall in a primary mangrove forest which mainly composed of Rhizophora apiculata BI, was investigated in Tura Island, (7 “21”30 “N,99”30’32”E). Trang Province, southern Thailand, for 3 years. Average total  annual litterfall was 1}376 g/m2/y. Leaves, reproductive structure, and wood constituted 68, 20 and 11% of the total litterfall, respectively. Leaf litterfall patern appeared ... Read More »

EFFECTS OF FOREST FIRE ON DIVERSITY OF SOIL ARTHROPODS AT PHU KRADUNG NATIONAL PARK

The study was carried out in hill evergreen forest, pine forest, mixed deciduous forest, and dry dipterocarp forest at Phu Kradung Nation Park, Loei province. Changes of diversity and density of soil arthropods were then separate from the collected samples and classified into classes, orders, families, genera, and counted the individual numbers. Ten temporary plots of 1×1 m2 in size ... Read More »

INFLUENCE OF RAINFALL ENERGY AND OVERLAND FLOW ON SOIL LOSS FROM TERRACED PLANTATION ON STEEP TERRAIN OF DOI ANGKHANG HIGHLAND PROJECT, CHIANG MAI

The influence of rainfall energy and overland flow on soil loss within a plantation of 6 exotic tree species from Taiwan, planted  with narrow terracing on steep terrain was determined. Data were collected from 4×15 m, runoff plots 2, 3 and 7 years after the plantation were established. One hundred and seventy six storm events of rainfall, runoff and soil ... Read More »

Teak Log Grading for Teak Plantation in Lao PDR

This research aimed to improve the grading system for Lao teak logs. The methodology used the guidelines from VALTIP2 project development, with parameters used to identify plantation teak log quality such as the proportion of hardwood, bend, pipe, knots, decay, end splitting, insect hole, wane, and metal objects. Out of 90 teak logs, 18 teak logs were in grade A, ... Read More »