{"id":"shumie-2024-bgb","source":{"id":"shumie-2024","citation":"Shumie, A., Alemu, A., Abebe, G., et al. (2024). Allometric equations for estimation of above- and below-ground biomass of Acacia mearnsii in northwestern Ethiopia. Forest Science and Technology, 20(3), 279-285.","title":"Allometric equations for estimation of above- and below-ground biomass of Acacia mearnsii in northwestern Ethiopia","authors":["Shumie, A.","Alemu, A.","Abebe, G."],"year":2024,"venue":"Forest Science and Technology","doi":"10.1080/21580103.2024.2366831","url":"https://doi.org/10.1080/21580103.2024.2366831","read_url":"https://www.tandfonline.com/doi/full/10.1080/21580103.2024.2366831","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Acacia mearnsii belowground biomass from D and H (Table 3, model 3)","output":{"quantity":"bgb"},"expression":"0.01 * D^2.57 * H^0.09","published":{"expression":"0.01 * D^2.57 * H^0.09","units":{"D":"cm","H":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Acacia mearnsii","family":"Fabaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["ET"],"place":"Farmer-managed woodlots, northwestern Ethiopia (Amhara)","biomes":["tropical","montane"]},"stand":"plantation","fit":{"n_trees":24,"dbh_min_cm":1.1,"dbh_max_cm":11.9,"h_min_m":2.1,"h_max_m":6.8,"r2":0.9241,"method":"nonlinear regression, form a D^b H^c"},"evidence":[{"field":"expression","quote":"0.01D2.57H0.09","locator":"Conclusion, and Figure 3 caption (BGB = 0.01D2.57 H0.09)"},{"field":"fit.r2","quote":"Below ground biomass 3. aDbHc 0.01 2.57 0.09 92.41","locator":"Table 3 (CSV rows)"},{"field":"fit.n_trees","quote":"twenty-four trees of varying ages (3, 4, 5, and 6 years) were harvested","locator":"Abstract"}],"check":[{"inputs":{"D":3,"H":2.5},"expected":0.1828,"origin":"computed","note":"computed from the published form"},{"inputs":{"D":7,"H":4.4},"expected":1.6975,"origin":"computed","note":"computed from the published form"},{"inputs":{"D":11,"H":6.5},"expected":5.6175,"origin":"computed","note":"computed from the published form"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Coefficient a is printed as 0.01 (two decimals), so predictions are coarse. D in cm, H in m, biomass in kg. Trees aged 3 to 6 years. R2 printed as 92.41 percent. Root biomass sampled as total root dry weight (coarse, medium and fine roots)."}