{"id":"wang-2017-dry-agb-dh","source":{"id":"wang-2017","citation":"Wang, X., Bi, H., Ximenes, F., Ramos, J., Li, Y. (2017). Product and Residue Biomass Equations for Individual Trees in Rotation Age Pinus radiata Stands under Three Thinning Regimes in New South Wales, Australia. Forests, 8(11), 439.","title":"Product and Residue Biomass Equations for Individual Trees in Rotation Age Pinus radiata Stands under Three Thinning Regimes in New South Wales, Australia","authors":["Wang, X.","Bi, H.","Ximenes, F."],"year":2017,"venue":"Forests","doi":"10.3390/f8110439","url":"https://doi.org/10.3390/f8110439","read_url":"https://www.mdpi.com/1999-4907/8/11/439","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Pinus radiata total tree dry weight from DBHOB and height (Eq. 8, Table 4)","output":{"quantity":"agb"},"expression":"0.0378 * D^1.893 * H^0.788 + 0.0372 * D^2.1755","published":{"expression":"0.0378 * DBHOB^1.893 * H^0.788 + 0.0372 * DBHOB^2.1755","units":{"DBHOB":"cm","H":"m"},"variables":{"DBHOB":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus radiata","family":"Pinaceae","group":"conifer"},"region":{"scope":"regional","countries":["AU"],"place":"Bathurst management area, central west slopes of New South Wales","biomes":["temperate"]},"stand":"plantation","fit":{"n_trees":239,"dbh_min_cm":18,"dbh_max_cm":70.1,"h_min_m":18.1,"h_max_m":37.3,"r2":0.94,"method":"system of additive nonlinear equations (product + residue), GMM"},"evidence":[{"field":"expression","quote":"Equation (8), Ŷprod = β10 D^β11 H^β12, Ŷres = β20 D^β21; dry weight β10 0.0378, β11 1.8930, β12 0.7880, β20 0.0372, β21 2.1755","locator":"Table 4, dry weight columns"},{"field":"expression","quote":"the predicted value of total tree biomass is equal to the sum of the predicted values of its components","locator":"Table 4 caption"},{"field":"fit.n_trees","quote":"a total of 239 trees, with DBHOB ranging from 18.0 to 70.1 cm and total tree height from 18.1 to 37.3 m, were destructively sampled","locator":"Section 2.3"}],"check":[{"inputs":{"D":20,"H":20},"expected":141.4658,"origin":"computed","note":"computed from the published form: product plus residue dry weight"},{"inputs":{"D":40,"H":30},"expected":708.2319,"origin":"computed","note":"computed from the published form: product plus residue dry weight"},{"inputs":{"D":65,"H":36},"expected":2047.68,"origin":"computed","note":"computed from the published form: product plus residue dry weight"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Dry-weight system with DBHOB and total height; R2 for total tree 0.94. Total tree dry weight is the sum of the product (stem sawlog and pulpwood) and residue (stump, branches with needles, waste) equations, so it is aboveground including stump and foliage. DBHOB is diameter at breast height over bark at 1.3 m, in cm; weights in kg (dry). Rotation-age stands, 28 to 42 years, unthinned and thinned pooled. Product and residue equations are not added individually, nor the fresh-weight, stand-type dummy (Equations 9 and 10) or allocative systems. No correction factor is applied."}