{"id":"kartashova-2026-euonymus-verrucosus-pbg-h","source":{"id":"kartashova-2026","citation":"Kartashova, N.P., Sheshnitsan, S.S., Tsaregorodtsev, A.V. (2026). Allometric models of biomass of understory trees and shrubs in pine stands of Voronezh Oblast. Forestry Engineering Journal (Lesotekhnicheskii zhurnal), 16(3), 6–19.","title":"Allometric models of biomass of understory trees and shrubs in pine stands of Voronezh Oblast (Аллометрические модели фитомассы деревьев и кустарников подлеска в сосновых насаждениях Воронежской области)","authors":["Kartashova, N.P.","Sheshnitsan, S.S.","Tsaregorodtsev, A.V."],"year":2026,"venue":"Lesotekhnicheskii zhurnal","doi":"10.34220/issn.2222-7962/2026.3/1","url":"https://doi.org/10.34220/issn.2222-7962/2026.3/1","read_url":"http://lestehjournal.ru/sites/default/files/journal_pdf/1._6-19_ltzh_2026_tom_16_no_3_63.pdf","access":"open","checked_at":"2026-11-01","status":"current"},"name":"Euonymus verrucosus, belowground dry mass vs height (Model 2)","output":{"quantity":"bgb"},"expression":"1.48 * exp(-4.119 + 1.409 * ln(H))","published":{"expression":"1.48 * exp(-4.119 + 1.409 * ln(H))","units":{"H":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Euonymus verrucosus","family":"Celastraceae","group":"shrub"},"region":{"scope":"site","countries":["RU"],"place":"Prigorodnoye Forestry, Levoberezhnoe District Forestry, Voronezh Oblast (pine stands, forest-steppe)","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":16,"h_min_m":0.3,"h_max_m":1.7,"r2":0.318,"cf":1.48,"method":"log-log regression (OLS on natural logs), Baskerville correction factor"},"evidence":[{"field":"expression","quote":"lnPbg = a0 + a1lnH; Euonymus verrucosus: a0 = -4,119, a1 = 1,409, BaskCF = 1,48","locator":"Eq. (1)/(2) and Table 2 (p. 10-11)"},{"field":"fit.n_trees","quote":"Euonymus verrucosus n = 16","locator":"Table 1, p. 9"}],"check":[{"inputs":{"H":0.5},"expected":0.00906257,"origin":"computed","note":"hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)"},{"inputs":{"H":1},"expected":0.0240659,"origin":"computed","note":"hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)"},{"inputs":{"H":1.5},"expected":0.0426104,"origin":"computed","note":"hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Understory plant (small tree/shrub) under Scots pine. Output in kg: the text states kg for P; Table 1 headings say g, but the kg reading matches Table 1 ranges. Predictor is plant height H in m. Selected as the significant (p<0.05) model with the best fit among 18 species x fraction x predictor models; many others are not significant and were omitted."}