{"id":"owate-2018-agb-power","source":{"id":"owate-2018","citation":"Owate, O.A., Mware, M.J., Kinyanjui, M.J. (2018). Allometric Equations for Estimating Silk Oak (Grevillea robusta) Biomass in Agricultural Landscapes of Maragua Subcounty, Kenya. International Journal of Forestry Research, 2018, 6495271.","title":"Allometric Equations for Estimating Silk Oak (Grevillea robusta) Biomass in Agricultural Landscapes of Maragua Subcounty, Kenya","authors":["Owate, O.A.","Mware, M.J.","Kinyanjui, M.J."],"year":2018,"venue":"International Journal of Forestry Research","doi":"10.1155/2018/6495271","url":"https://doi.org/10.1155/2018/6495271","read_url":"https://onlinelibrary.wiley.com/doi/full/10.1155/2018/6495271","access":"open","license":"CC BY 4.0","checked_at":"2026-11-01","status":"current"},"name":"Grevillea robusta on farms, power model in DBH","output":{"quantity":"agb"},"expression":"1.384 * D^1.665","published":{"expression":"1.384 * DBH^1.665","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Grevillea robusta","family":"Proteaceae","group":"broadleaf"},"region":{"scope":"site","countries":["KE"],"place":"Maragua subcounty, Murang'a County, central Kenya (farms)","biomes":["tropical"]},"stand":"agroforestry","fit":{"n_trees":33,"dbh_min_cm":1.5,"dbh_max_cm":29.8,"h_min_m":3.6,"h_max_m":24.8,"r2":0.98,"method":"power regression"},"evidence":[{"field":"expression","quote":"AGB=1.384DBH1.665","locator":"Table 6 (power model)"}],"check":[{"inputs":{"D":15},"expected":125.7,"origin":"computed","note":"hand-computed from the published form"},{"inputs":{"D":28},"expected":355.35,"origin":"computed","note":"hand-computed from the published form"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Table 6 lists it with R2 0.98, SEE 0.99 and MRE 3.2; the authors selected the polynomial instead (Table 7). Safer than the polynomial for small trees."}