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Shorea leprosula belongs to the Dipterocarpaceae family and grows in Indonesia's tropical forests which have an economic and ecological role. They are a plant in tropical forests that is known as a producer of fruit and tengkawang oil. The presence of S. leprosula trees in the habitat naturally at this time was very hard to find and began to decrease in population. This study aims to determine the potential and distribution pattern of S. leprosula found around KHDTK Aek Nauli. The research method uses the plot path method measuring 20 m × 20 m, the total number of plots is 150 plots. The research results show that the potency of S. leprosula is 63.17 m3 ha-1. The highest important value index of S. leprosula at the tree level was 25.45%. The distribution pattern of S. leprosula at the sapling, pole, and tree levels was clustered, while the distribution pattern at the seedling level was random. The importance of information about the potential and pattern of S. leprosula to be known as an indicator of the current status of its population at KHDTK Aek Nauli and as an information basis for managing management S. leprosula for support preservation in the forest.

Wood quality of five year-old of cultivated Red Meranti (Shorea leprosula Miq.) was studied in order to assure its proper utilization. The evaluation was conducted based on fiber dimension and physical properties of wood. Fiber dimension was measured through maceration specimen, while green moisture content, wood density, and specific gravity were measured following the modification of BS 373.75. Result shows that quality of Red Meranti wood studied was similar to that of naturally grown, except for its fibers which were shorter and thinner than those of naturally grown. It was found that wood quality of each tree was homogenous and even. Result also shows that average values of fiber length, cell wall thickness, moisture content in green condition, wood density and SG are 968.12 µm, 2.72 µm, 104.57%, 0.81 g/cm3, and 0.50, respectively. The wood is categorized as strength class of III, therefore, this Shorea leprosula wood is potential as raw material for plywood and furniture manufacturing, as well as for the 3-rd class of structural and other purposes. The trees unfortunately have not produce the mature wood yet, and the wood produced is not suitable for the highest quality of pulp and paper manufacturing.

Selective Cutting and Line Planting (SCLP) silvicultural system can be applied in the logged over forest and low potential forest to improve their productivity . The research was aimed to create the growth modelling of Shorea plantations in the line planting system. The research was conducted at research plots of SCLP in logged over forest of PT Gunung Meranti, Central Kalimantan Province. The research plots were divided into three plots of Shorea leprosula plantation that planted in 1994 as plot 1, year 1999 as plot 2 and year 2008 in which consisted of 200 samples of trees, respectively. Data of Shorea leprosula growth were evaluated by Stella 9.0.2 and SPSS 13, and predicted using table of volume, exponential and polynomial equations. The research result showed that exponential equation was y= 1,0269.e0,012X (R2= 96,02%) and estimated cutting cycle at 37 year old, average polynomial equation was y=0,0297x2 + 0,8208x + 0,3728 (R2= 86,89%) and estimated cutting cycle at 30 year old and group polynomial equations (R2> 95%) estimated cutting cycle at 32 years old. The best model was group polynomial equations that represented exponential equation and average polynomial equation in the yield of volume