{"id":"ruiz-peinado-2012-quercus-suber-root","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 root biomass (Table 2)","output":{"quantity":"bgb"},"expression":"0.0829 * D^2","published":{"expression":"0.0829 * d^2","units":{"d":"cm"},"variables":{"d":"D"},"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":11,"method":"regression fitted independently of the aboveground system"},"evidence":[{"field":"expression","quote":"Wr = 0.0829 · d²","locator":"Table 2, Quercus suber, Roots row"},{"field":"fit.n_trees","quote":"Quercus suber ... 11","locator":"Table 1, Quercus suber row, root biomass n column"}],"check":[{"inputs":{"D":15},"expected":18.6525,"origin":"computed","note":"computed from the Table 2 coefficients"},{"inputs":{"D":35},"expected":101.5525,"origin":"computed","note":"computed from the Table 2 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Belowground biomass; fewer trees than aboveground (one tree per diameter class). Table 1 diameter range covers all sample trees, not only the root subset, so no DBH range is set. Stand type is not stated per species in the paper. Branch equations for this species are not added."}