{"id":"prayogo-2018-dbh","source":{"id":"prayogo-2018","citation":"Prayogo, C., Sari, R. R., Asmara, D. H., Rahayu, S., & Hairiah, K. (2018). Allometric Equation for Pinang (Areca catechu) Biomass and C Stocks. AGRIVITA Journal of Agricultural Science, 40(3), 381–389.","title":"Allometric Equation for Pinang (Areca catechu) Biomass and C Stocks","authors":["Prayogo, C.","Sari, R. R.","Asmara, D. H."],"year":2018,"venue":"AGRIVITA Journal of Agricultural Science","doi":"10.17503/agrivita.v40i3.1124","url":"https://doi.org/10.17503/agrivita.v40i3.1124","read_url":"https://agrivita.ub.ac.id/index.php/agrivita/article/download/1124/985","access":"open","checked_at":"2026-11-02","status":"current","notes":"Author list truncated to the first three of five (Prayogo, Sari, Asmara, Rahayu, Hairiah), as printed in the article header and its \"Cite this as\" line."},"name":"Areca palm (pinang) AGB from DBH","output":{"quantity":"agb"},"expression":"0.0689 * D^2.5977","published":{"expression":"0.0689 * D^2.5977","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"species","name":"Areca catechu","family":"Arecaceae","group":"palm"},"region":{"scope":"site","countries":["ID"],"place":"Wambena village, Depapre, Jayapura, Papua","biomes":["tropical"]},"stand":"agroforestry","fit":{"n_trees":9,"r2":0.74,"method":"power regression"},"evidence":[{"field":"expression","quote":"TDW (AGB) = 0.0689 D 2.5977 (R² = 0.74)","locator":"Results and Discussion, p. 385"},{"field":"fit.n_trees","quote":"A total of 9 palms were measured","locator":"Materials and Methods"}],"check":[{"inputs":{"D":6},"expected":7.2381,"origin":"computed","note":"hand-computed from the published form"},{"inputs":{"D":9},"expected":20.7518,"origin":"computed","note":"hand-computed from the published form"},{"inputs":{"D":11},"expected":34.9498,"origin":"computed","note":"hand-computed from the published form"}],"verification":"original_read","checked_at":"2026-11-02","notes":"D is stem diameter at 1.3 m (D1.3, called DBH in Fig. 4). AGB = stem (WBT) plus leaf dry weight, fruit and flowers taken into account; kg dry mass. Palms sampled in classes of <6, 6-9, 9-11 and >11 cm DBH (3 per class); exact min and max not printed. The two height equations (AGB = 0.8164 H^1.4202 and AGB = 0.03883*H*D^1.2) are left out because the paper calls H both total plant height and stem height."}