{"id":"ruiz-peinado-2012-quercus-suber-stem","source":{"id":"ruiz-peinado-2012","citation":"Ruiz-Peinado, R., Montero, G., & del Rio, M. (2012). Biomass models to estimate carbon stocks for hardwood tree species. Forest Systems, 21(1), 42-52.","title":"Biomass models to estimate carbon stocks for hardwood tree species","authors":["Ruiz-Peinado, R.","Montero, G.","del Rio, M."],"year":2012,"venue":"Forest Systems","doi":"10.5424/fs/2112211-02193","url":"https://doi.org/10.5424/fs/2112211-02193","read_url":"https://fs.revistas.csic.es/index.php/fs/article/download/2193/1635","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Quercus suber stem with bark biomass (Table 2)","output":{"quantity":"stem_biomass"},"expression":"0.00525 * D^2 * H + 0.278 * D * H","published":{"expression":"0.00525 * d^2 * h + 0.278 * d * h","units":{"d":"cm","h":"m"},"variables":{"d":"D","h":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Quercus suber","family":"Fagaceae","group":"broadleaf"},"region":{"scope":"national","countries":["ES"],"place":"Spain (sample zones per species, Figure 1)","biomes":["temperate"]},"stand":"mixed","fit":{"n_trees":33,"dbh_min_cm":10.5,"dbh_max_cm":83,"h_min_m":3.5,"h_max_m":14,"method":"seemingly unrelated regression with weighting"},"evidence":[{"field":"expression","quote":"Ws = 0.00525 · d² · h + 0.278 · d · h","locator":"Table 2, Quercus suber, Stem row"},{"field":"fit.n_trees","quote":"Quercus suber ... 33","locator":"Table 1, Quercus suber row, aboveground biomass n column"},{"field":"fit.dbh_min_cm","quote":"Quercus suber 10.5 83.0","locator":"Table 1, diameter min/max (all sample trees of the species)"}],"check":[{"inputs":{"D":20,"H":10},"expected":76.6,"origin":"computed","note":"computed from the Table 2 coefficients"},{"inputs":{"D":35,"H":15},"expected":242.4188,"origin":"computed","note":"computed from the Table 2 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Stem with bark (commercial volume, up to a top diameter of 7 cm); fitted jointly with the branch equations by SUR to keep components additive. Stand type is not stated per species in the paper. Branch equations for this species are not added."}