{"id":"istrefi-2018-bushtrice-dbh2-h","source":{"id":"istrefi-2018","citation":"Istrefi, E., Toromani, E., Çollaku, N. (2018). Allometric Relationships for Estimation of Above-Ground Biomass in Young Turkey Oak (Quercus cerris L.) Stands in Albania. Acta Silvatica et Lignaria Hungarica, 14(1), 65-81.","title":"Allometric Relationships for Estimation of Above-Ground Biomass in Young Turkey Oak (Quercus cerris L.) Stands in Albania","authors":["Istrefi, E.","Toromani, E.","Çollaku, N."],"year":2018,"venue":"Acta Silvatica et Lignaria Hungarica","doi":"10.2478/aslh-2018-0004","url":"https://doi.org/10.2478/aslh-2018-0004","read_url":"http://real.mtak.hu/88131/1/10.2478-aslh-2018-0004.pdf","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Quercus cerris AGB, Bushtrice site (DBH squared and height, Table 6)","output":{"quantity":"agb"},"expression":"-3.73 + 0.05 * D^2 + 2.02 * H","published":{"expression":"-3.73 + 0.05 * DBH^2 + 2.02 * Ht","units":{"DBH":"cm","Ht":"m"},"variables":{"DBH":"D","Ht":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Quercus cerris","family":"Fagaceae","group":"broadleaf"},"region":{"scope":"site","countries":["AL"],"place":"Bushtrice, Albania (young coppice stand)","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":9,"dbh_min_cm":4.5,"dbh_max_cm":13.5,"h_min_m":3.3,"h_max_m":9.4,"r2":0.97,"method":"linear or nonlinear regression without transformation"},"evidence":[{"field":"expression","quote":"DW = –3.73 + 0.05 • DBH2 + 2.02 • H","locator":"Table 6, Bushtrice row, total aboveground dry weight"},{"field":"fit.r2","quote":"R2 0.97","locator":"Table 6, Bushtrice row, total aboveground dry weight, R2 column"},{"field":"fit.n_trees","quote":"Bushtrice 9","locator":"Table 3, Sampled tree number"}],"check":[{"inputs":{"D":9,"H":6.35},"expected":13.147,"origin":"computed","note":"hand-computed from the published form at the mid-point of the sampled range"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Young Q. cerris coppice stand at Bushtrice, Albania; whole-tree dry weight DW is the sum of stem, branches and leaves (roots not studied). Site-specific equation fitted on the 8-12 sampled trees of that site; 4.5-13.5 cm DBH and 3.3-9.4 m height are the sampled-tree ranges (Table 3). Fit by regression without transformation, so no correction factor. DBH and H are both in the model; second form of the pair uses DBH squared."}