{"id":"chakraborty-2016-drc-branch","source":{"id":"chakraborty-2016","citation":"Chakraborty, T., Saha, S., & Reif, A. (2016). Biomass equations for European beech growing on dry sites. iForest, 9(5), 751-757.","title":"Biomass equations for European beech growing on dry sites","authors":["Chakraborty, T.","Saha, S.","Reif, A."],"year":2016,"venue":"iForest - Biogeosciences and Forestry","doi":"10.3832/ifor1881-009","url":"https://doi.org/10.3832/ifor1881-009","read_url":"https://iforest.sisef.org/pdf/?id=ifor1881-009","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Beech saplings on dry sites, branch dry biomass including foliage from root-collar diameter (Table 2)","output":{"quantity":"branch_biomass"},"expression":"0.02 * DRC^2.533","published":{"expression":"0.02 * DRC^2.533","units":{"DRC":"cm"},"variables":{"DRC":"DRC"},"output_unit":"kg"},"taxon":{"level":"species","name":"Fagus sylvatica","family":"Fagaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["DE","CH"],"place":"Five abandoned oak-coppice stands on dry south-facing sites, southern Germany and northern Switzerland","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":20,"method":"power function regression, biomass = a * diameter^b (dry mass)"},"evidence":[{"field":"expression","quote":"BR Dry a 0.02 b 2.533 Adj-R² 0.77 N 20","locator":"Table 2, BR Dry row"},{"field":"fit.n_trees","quote":"N 20","locator":"Table 2, BR Dry row"}],"check":[{"inputs":{"DRC":1.5},"expected":0.0559,"origin":"computed","note":"computed from the published coefficients"},{"inputs":{"DRC":2.5},"expected":0.2037,"origin":"computed","note":"computed from the published coefficients"},{"inputs":{"DRC":3.5},"expected":0.4777,"origin":"computed","note":"computed from the published coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Dry biomass in kg. Adjusted R2 as printed: 0.77. Saplings only; DRC measured at 5 cm above ground, sapling DRC range 1.1-4.1 cm. Branch biomass includes foliage.. Fitted on dry-site beech; the paper also gives fresh-biomass and log-transformed variants (not added)."}