{"id":"siqing-2022-stem","source":{"id":"siqing-2022","citation":"Siqing, B., Meng, S., Liu, L., et al. (2022). Additive Allometric Equations to Improve Aboveground Biomass Estimation for Mongolian Pine Plantations in Mu Us Sandy Land, Inner Mongolia, China. Forests, 13(10), 1672.","title":"Additive Allometric Equations to Improve Aboveground Biomass Estimation for Mongolian Pine Plantations in Mu Us Sandy Land, Inner Mongolia, China","authors":["Siqing, B.","Meng, S.","Liu, L."],"year":2022,"venue":"Forests","doi":"10.3390/f13101672","url":"https://doi.org/10.3390/f13101672","read_url":"https://www.mdpi.com/1999-4907/13/10/1672/htm","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Mongolian pine plantation stem biomass from D and H, Mu Us (Table 3)","output":{"quantity":"stem_biomass"},"expression":"0.041 * D^1.699 * H^0.983","published":{"expression":"0.041 * D^1.699 * H^0.983","units":{"D":"cm","H":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus sylvestris var. mongolica","family":"Pinaceae","group":"conifer"},"region":{"scope":"regional","countries":["CN"],"place":"Mu Us Sandy Land, Ordos, Inner Mongolia, China","biomes":["temperate","dryland"]},"stand":"plantation","fit":{"n_trees":131,"dbh_min_cm":2.4,"dbh_max_cm":44.2,"h_min_m":1.9,"h_max_m":15.25,"method":"weighted nonlinear seemingly unrelated regression (WNSUR), additive system"},"evidence":[{"field":"expression","quote":"Stem Wst = 0.041D1.699H0.983","locator":"Table 3, Stem row"},{"field":"fit.n_trees","quote":"A total of 131 trees were measured","locator":"Abstract"}],"check":[{"inputs":{"D":8,"H":5},"expected":6.8269,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":20,"H":9},"expected":57.7104,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":35,"H":13},"expected":214.3689,"origin":"computed","note":"computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Additive system fitted by WNSUR (Table 3). 131 trees (116 felled, 15 climbed standing trees); n and ranges from Table 1 and Section 2.2. Biomass of stump not included. Exponents are printed flattened in the HTML text (D followed by its exponent); read as D^exponent and consistent with Table 2. No R2 recorded (the paper gives adjusted R2 only)."}