{"id":"rufini-2010-sh-r1-tvol-bark","source":{"id":"rufini-2010","citation":"Rufini, A.L., Scolforo, J.R.S., Oliveira, A.D. de, Mello, J.M. de (2010). Equações volumétricas para o cerrado sensu stricto, em Minas Gerais. CERNE, 16(1), 1-11.","title":"Equações volumétricas para o cerrado sensu stricto, em Minas Gerais","authors":["Rufini, A.L.","Scolforo, J.R.S.","Oliveira, A.D. de"],"year":2010,"venue":"CERNE","doi":"10.1590/s0104-77602010000100001","url":"https://doi.org/10.1590/s0104-77602010000100001","read_url":"https://www.scielo.br/j/cerne/a/n7hz4jCWRWRnMgBGSCpD8Vp/?lang=pt&format=pdf","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Cerrado s.s. MG, Total volume with bark, Schumacher-Hall log, SF 1, 2, 3, 4 sub-basins (region 1)","output":{"quantity":"total_volume"},"expression":"exp(-9.8295559061 + 2.352792258 * ln(D) + 0.6087571437 * ln(H))","published":{"expression":"exp(-9.8295559061 + 2.352792258 * ln(Dap) + 0.6087571437 * ln(H))","units":{"Dap":"cm","H":"m"},"variables":{"Dap":"D"},"output_unit":"m3"},"taxon":{"level":"mixed","name":"Cerrado sensu stricto tree species (mixed)","group":"mixed"},"region":{"scope":"regional","countries":["BR"],"place":"Minas Gerais, Sao Francisco river basin, SF 1, 2, 3, 4 sub-basins (region 1)","biomes":["tropical","dryland"]},"stand":"natural","fit":{"n_trees":157,"r2":0.9863,"method":"log-transformed linear regression (Schumacher-Hall log) on Huber rigorous cubing data"},"evidence":[{"field":"expression","quote":"Ln(VTcc) = -9,8295559061 + 2,352792258 * Ln(Dap) + 0,6087571437 * Ln(H)","locator":"Table 1 (selected equations by region)"},{"field":"fit.n_trees","quote":"157 árvores para a região 1","locator":"2.2 Base de dados, p. 2"}],"check":[{"inputs":{"D":5,"H":3},"expected":0.00463511,"origin":"computed","note":"hand-computed from the published form (coefficients as printed)"},{"inputs":{"D":10,"H":5},"expected":0.0323127,"origin":"computed","note":"hand-computed from the published form (coefficients as printed)"},{"inputs":{"D":20,"H":8},"expected":0.219732,"origin":"computed","note":"hand-computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Dap, H and volume units are not spelled out beside the model; read as Dap in cm (derived from girth in cm at 1.30 m), total height H in m, volume in m3 (Table headings give Syx in m3); magnitudes are consistent with these units. No back-transformation correction factor is stated, so none is applied. R2 printed as a percentage. Total volume includes stem and branches down to 3 cm diameter."}