{"id":"kuyah-2012-dbh","source":{"id":"kuyah-2012","citation":"Kuyah, S., Dietz, J., Muthuri, C., Jamnadass, R., Mwangi, P., Coe, R., Neufeldt, H. (2012). Allometric equations for estimating biomass in agricultural landscapes: I. Aboveground biomass. Agriculture, Ecosystems & Environment, 158, 216–224.","title":"Allometric equations for estimating biomass in agricultural landscapes: I. Aboveground biomass","authors":["Kuyah, S.","Dietz, J.","Muthuri, C.","Jamnadass, R.","Mwangi, P.","Coe, R.","Neufeldt, H."],"year":2012,"venue":"Agriculture, Ecosystems & Environment","doi":"10.1016/j.agee.2012.05.011","url":"https://doi.org/10.1016/j.agee.2012.05.011","access":"paywalled","checked_at":"2026-11-01","status":"current"},"name":"Trees on farms in western Kenya, DBH only","output":{"quantity":"agb"},"expression":"0.091 * D^2.472","published":{"expression":"0.091 * DBH^2.472","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Trees on farms, mixed species (agricultural landscape)","group":"broadleaf"},"region":{"scope":"site","countries":["KE"],"place":"Yala River basin, western Kenya","biomes":["tropical"]},"stand":"agroforestry","fit":{"n_trees":72,"dbh_min_cm":2.5,"dbh_max_cm":102,"r2":0.977,"method":"power model (coefficients as in Kuyah et al. 2012a)"},"evidence":[{"field":"expression","quote":"(equation 3, AGB = 0.091 × DBH^2.472)","locator":"Kuyah & Rosenstock 2015, Methods / Table 1"},{"field":"fit.n_trees","quote":"72","locator":"Kuyah & Rosenstock 2015, Methods"}],"check":[{"inputs":{"D":20},"expected":149.69,"origin":"computed","note":"hand-computed from the published form"},{"inputs":{"D":50},"expected":1441.77,"origin":"computed","note":"hand-computed from the published form"}],"verification":"secondary","secondary_url":"https://doi.org/10.1007/s10457-014-9747-9","checked_at":"2026-11-01","notes":"Fitted by Kuyah et al. 2012 (not read: paywalled). Read from Kuyah & Rosenstock 2015, which restates it as equation 3. That text does not say whether a log back-transform correction is folded into 0.091; output assumed kg, DBH in cm."}