{"id":"poudel-2019-pinus-jeffreyi","source":{"id":"poudel-2019","citation":"Poudel, K. P., Temesgen, H., Radtke, P. J., & Gray, A. N. (2019). Estimating individual-tree aboveground biomass of tree species in the western U.S.A. Canadian Journal of Forest Research, 49(6), 701-714.","title":"Estimating individual-tree aboveground biomass of tree species in the western U.S.A.","authors":["Poudel, K. P.","Temesgen, H.","Radtke, P. J."],"year":2019,"venue":"Canadian Journal of Forest Research","doi":"10.1139/cjfr-2018-0361","url":"https://doi.org/10.1139/cjfr-2018-0361","read_url":"https://vtechworks.lib.vt.edu/bitstreams/13666b54-8fb3-444c-8f8f-f54bc602a4b9/download","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Jeffrey pine total aboveground biomass from DBH (Table 4)","output":{"quantity":"agb"},"expression":"1.0258 * exp(-3.1894 + 3.2244 * ln(D))","published":{"expression":"1.0258 * exp(-3.1894 + 3.2244 * ln(DBH))","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus jeffreyi","family":"Pinaceae","group":"conifer"},"region":{"scope":"regional","countries":["US"],"place":"Western U.S.A., legacy destructive-sampling biomass collection (Radtke et al. 2015)","biomes":["temperate"]},"stand":"mixed","fit":{"n_trees":9,"dbh_min_cm":14.5,"dbh_max_cm":43.4,"h_min_m":8.4,"h_max_m":21,"cf":1.0258,"method":"regression on ln(AGB) with Baskerville log-bias correction factor"},"evidence":[{"field":"expression","quote":"Jeffrey pine  a, b, c, d, CF: −3.1894  3.2244  CF 1.0258; model form exp(a + bX1)","locator":"Table 4, species row and table note"},{"field":"fit.n_trees","quote":"Jeffrey pine ... n 9","locator":"Table 1"},{"field":"fit.dbh_min_cm","quote":"Jeffrey pine DBH min 14.5 max 43.4; HT min 8.4 max 21.0","locator":"Table 1"}],"check":[{"inputs":{"D":15},"expected":261.8861,"origin":"computed","note":"computed from the Table 4 coefficients"},{"inputs":{"D":35},"expected":4023.6192,"origin":"computed","note":"computed from the Table 4 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"AGB is total aboveground live-tree biomass (stem, bark, branches, foliage). X1 = ln(DBH), X2 = ln(HT), DBH in cm and HT in m. Species identified from the common name in Table 4 (scientific name added from the standard species symbol). Stand type is not stated. Observed ranges in Table 1 cover all trees of the species used."}