{"id":"darcha-2025-m1-dbh","source":{"id":"darcha-2025","citation":"Darcha, G., Birhane, E., Kassa, H., Gebrewahid, Y. (2025). Allometric equations to predict aboveground biomass and carbon stock of Faidherbia albida in parkland agroforestry. Forest Science and Technology, 21(3), 221–232.","title":"Allometric equations to predict aboveground biomass and carbon stock of Faidherbia albida in parkland agroforestry","authors":["Darcha, G.","Birhane, E.","Kassa, H."],"year":2025,"venue":"Forest Science and Technology","doi":"10.1080/21580103.2025.2497246","url":"https://doi.org/10.1080/21580103.2025.2497246","access":"open","license":"CC BY","checked_at":"2026-11-01","status":"current"},"name":"Faidherbia albida in parklands, DBH only (M1, selected)","output":{"quantity":"agb"},"expression":"1.05 * exp(-2.85 + 2.4 * ln(D))","published":{"expression":"1.05 * exp(-2.85 + 2.4 * ln(DBH))","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Faidherbia albida","family":"Fabaceae","group":"broadleaf"},"region":{"scope":"site","countries":["ET"],"place":"Parklands of Kilte Awlaelo, Hawzen and Ganta-Afeshum districts, eastern Tigray, Ethiopia (about 1850-2610 m)","biomes":["tropical","montane","dryland"]},"stand":"agroforestry","fit":{"n_trees":35,"dbh_min_cm":8,"dbh_max_cm":31,"h_min_m":3,"h_max_m":11.5,"r2":0.88,"rse":0.3,"cf":1.05,"method":"OLS on ln-transformed data, adjusted R2"},"evidence":[{"field":"expression","quote":"Ln (AGB) = -2.85 + 2.4 ln (DBH)","locator":"Abstract; Table 4 M1 (CF 1.05)"},{"field":"fit","quote":"Ln (TAGB) = a0 + a1 ln (DBH) ... −2.85 2.4 ... CF 1.05 ... 0.88 ... 0.3","locator":"Table 4, M1"}],"check":[{"inputs":{"D":15},"expected":40.37,"origin":"computed","note":"hand-computed from the published form"},{"inputs":{"D":30},"expected":213.08,"origin":"computed","note":"hand-computed from the published form"}],"verification":"original_read","checked_at":"2026-11-01","notes":"CF 1.05 (Table 4) multiplies the back-transformed exponential. DBH taken at 1.37 m per the paper (also given as 1.3 m in the methods). Only 35 trees and DBH 8-31 cm."}