انجمن علمی جنگلبانی ایران مجله جنگل ایران 2008-6113 17 4 2026 02 20 Evaluating Timber Volume Discrepancies in Teak Plantations of the Sagarnath Forest Development Project, Nepal: A Comparative Study Evaluating Timber Volume Discrepancies in Teak Plantations of the Sagarnath Forest Development Project, Nepal: A Comparative Study 559 569 231425 10.22034/ijf.2025.492785.2023 FA Anish Baral Tribhuvan University, Institute of Forestry, Pokhara Campus, Pokhara. Rajeev Joshi College of Natural Resource Management, Faculty of Forestry, Agriculture and Forestry University, Katari-56310, Udayapur, Nepal. Santosh Ghimire Faculty of Forestry, Agriculture and Forestry University, Hetauda-44107, Nepal. Aman Prabhakar College of Natural Resource Management, Faculty of Forestry, Agriculture and Forestry University, Katari-56310, Udayapur, Nepal. Pramod Subedi Faculty of Forestry, Agriculture and Forestry University, Hetauda-44107, Nepal. 0009-0004-0608-8346 Journal Article 2024 12 07 Accurate forest biomass estimation, productivity, yield regulation, and carbon stock rely on precise volume prediction at both the individual tree and stand levels. This study, titled “Comparison of Standing and After-Felled Volume of Timber in Teak Plantation in the Sagarnath Forest Development Project, Nepal,” was conducted in the Sagarnath Forest Development Project (SFDP) in Sarlahi District. The primary objective of this research was to calculate the disparity in timber volume before and after harvesting in a teak forest. The 2D felling site provided 150 sample trees for data collection. Before felling, the diameter at breast height (DBH) of standing trees was measured using a diameter tape, tree height was measured with a range finder, and tree quality class was determined based on community forest inventory guidelines. After felling, the total length of the log, girth at the mid-length of the log, and the length and diameter of hollowness and the depth of the buttress were measured using a measuring tape. To compute timber volume before felling, the formula defined in the <em style="mso-bidi-font-style: normal;">Community Forest Resource Inventory Guideline, 2061</em> was utilized, while the quarter-girth formula was employed to calculate timber volume after felling. The findings indicated an overestimation of 696.80 cubic feet of timber before harvesting. A 95% confidence interval F-test demonstrated a significant difference in timber volume before and after felling. There was a loss of 14.58 cu. ft of timber volume due to hollowness in the tree, and 83.10 cu. ft of timber was lost due to buttresses. Likewise, a difference in volume was observed based on quality class due to inaccurate classification. Accurate forest biomass estimation, productivity, yield regulation, and carbon stock rely on precise volume prediction at both the individual tree and stand levels. This study, titled “Comparison of Standing and After-Felled Volume of Timber in Teak Plantation in the Sagarnath Forest Development Project, Nepal,” was conducted in the Sagarnath Forest Development Project (SFDP) in Sarlahi District. The primary objective of this research was to calculate the disparity in timber volume before and after harvesting in a teak forest. The 2D felling site provided 150 sample trees for data collection. Before felling, the diameter at breast height (DBH) of standing trees was measured using a diameter tape, tree height was measured with a range finder, and tree quality class was determined based on community forest inventory guidelines. After felling, the total length of the log, girth at the mid-length of the log, and the length and diameter of hollowness and the depth of the buttress were measured using a measuring tape. To compute timber volume before felling, the formula defined in the <em style="mso-bidi-font-style: normal;">Community Forest Resource Inventory Guideline, 2061</em> was utilized, while the quarter-girth formula was employed to calculate timber volume after felling. The findings indicated an overestimation of 696.80 cubic feet of timber before harvesting. A 95% confidence interval F-test demonstrated a significant difference in timber volume before and after felling. There was a loss of 14.58 cu. ft of timber volume due to hollowness in the tree, and 83.10 cu. ft of timber was lost due to buttresses. Likewise, a difference in volume was observed based on quality class due to inaccurate classification. https://www.ijf-isaforestry.ir/article_231425_9baa786212825523d38541fcfeb8e813.pdf