Effectiveness and Efficiency of Using Tree Sampling Methods on Estimating Eucalyptus Stand Potential (Eucalyptus Pellita F. Meull)

Muhammad Ikhwan, Emy Sadjati, Ambar Tri R. N

Abstract


Forest inventory is basically a data collection activity. This activity is classified as important, because it affects the next activities. Therefore, the data collected must have sufficiently high accuracy. A method of determining a sampling unit that is considered to be simpler, easier, and faster is the tree sampling method. The purpose of this study was to calculate the potential amount of eucalyptus stands in eucalyptus plantations at PT. PSPI District Lipat kain and to calculate the relative efficiency of the sample unit. The area of eucalyptus stands is 5 ha. The sample units used are circular, 6-trees sampling, and 8-trees sampling, carried out using the Simple Random Sampling method. The estimated potential value of eucalyptus stands with the 6 sample tree method has an average volume of plotting stands of 1 m3. The study area is 5 ha, so the estimated volume of stands for the entire area is 1,036.33 m3 with sampling error of 14.49%. The estimated value of eucalyptus stand potential with the 8 sample tree method has an average volume of plotting stands of 1.39 m3. The study area is 5 ha, then the estimated stand volume for all areas is 947.80 m3 with a sampling error of 10.79%. The estimated potential value of eucalyptus stands with a circular plot of 15.8 meters in diameter has an average volume of plotting stands of 4.59 m3. The area of the study is 5 ha, so the estimated volume of stands for all areas is 1,171.79 m3 with a sampling error of 11.18%.


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