{"id":"meng-2021-foliage-d","source":{"id":"meng-2021","citation":"Meng, S., Yang, F., Hu, S., et al. (2021). Generic Additive Allometric Models and Biomass Allocation for Two Natural Oak Species in Northeastern China. Forests, 12(6), 715.","title":"Generic Additive Allometric Models and Biomass Allocation for Two Natural Oak Species in Northeastern China","authors":["Meng, S.","Yang, F.","Hu, S."],"year":2021,"venue":"Forests","doi":"10.3390/f12060715","url":"https://doi.org/10.3390/f12060715","read_url":"https://www.mdpi.com/1999-4907/12/6/715/htm","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Oak foliage biomass from D, additive system 1 (Table 4)","output":{"quantity":"foliage_biomass"},"expression":"0.019 * D^1.964","published":{"expression":"0.019 * D^1.964","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"genus","name":"Quercus (Q. mongolica and Q. wutaishanica)","family":"Fagaceae","group":"broadleaf","members":["Quercus mongolica","Quercus wutaishanica"],"members_complete":true},"region":{"scope":"regional","countries":["CN"],"place":"Daxing'anling, Xiaoxing'anling and Changbai mountains, NE China","biomes":["temperate","boreal","montane"]},"stand":"natural","fit":{"n_trees":159,"dbh_min_cm":1.5,"dbh_max_cm":33,"h_min_m":1.4,"h_max_m":20.5,"method":"weighted nonlinear seemingly unrelated regression (NSUR), additive system"},"evidence":[{"field":"expression","quote":"Foliage Wfo = 0.019D1.964","locator":"Table 4, System 1"},{"field":"fit.n_trees","quote":"A total of 159 sample trees","locator":"Abstract"}],"check":[{"inputs":{"D":5,"H":4},"expected":0.4483,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":15,"H":9},"expected":3.8779,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":28,"H":16},"expected":13.2121,"origin":"computed","note":"computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Fitted on 120 Mongolian oak and 39 Liaodong oak trees (Table 1; D 1.5-33.0 cm). Exponents are printed flattened in the HTML text; read as D^exponent. No R2 recorded (adjusted R2 only)."}