{"id":"chakraborty-2016-dbh-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 on dry sites, branch dry biomass including foliage from DBH (Table 3)","output":{"quantity":"branch_biomass"},"expression":"0.123 * D^1.776","published":{"expression":"0.123 * DBH^1.776","units":{"DBH":"cm"},"variables":{"DBH":"D"},"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":66,"dbh_min_cm":2,"dbh_max_cm":18,"method":"power function regression, biomass = a * diameter^b (dry mass)"},"evidence":[{"field":"expression","quote":"BR Dry a 0.123 b 1.776 Adj-R² 0.79 N 66","locator":"Table 3, BR Dry row"},{"field":"fit.n_trees","quote":"N 66","locator":"Table 3, BR Dry row"},{"field":"fit.dbh_min_cm","quote":"The range of the DRC and DBH of 86 plants were 1.1-4.1 cm and 2-18 cm, respectively.","locator":"Materials and methods, Sampling design"}],"check":[{"inputs":{"D":5},"expected":2.1443,"origin":"computed","note":"computed from the published coefficients"},{"inputs":{"D":10},"expected":7.3435,"origin":"computed","note":"computed from the published coefficients"},{"inputs":{"D":15},"expected":15.0884,"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: 0.79. Branch biomass includes foliage, so it is a branch plus leaves total.. Fitted on dry-site beech; the paper also gives fresh-biomass and log-transformed variants (not added)."}