{"id":"ipcc-2019-v4-ch4-rs-rainforest-asia-le125","source":{"id":"ipcc-2019-v4-ch4","citation":"Domke, G., Brandon, A., Diaz-Lasco, R., et al. (2019). Chapter 4: Forest Land. In: 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 4: Agriculture, Forestry and Other Land Use. IPCC.","title":"2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 4, Chapter 4: Forest Land","authors":["Domke, G.","Brandon, A.","Diaz-Lasco, R."],"year":2019,"venue":"IPCC 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories","url":"https://www.ipcc-nggip.iges.or.jp/public/2019rf/vol4.html","read_url":"https://www.ipcc-nggip.iges.or.jp/public/2019rf/pdf/4_Volume4/19R_V4_Ch04_Forest%20Land.pdf","access":"open","checked_at":"2026-11-01","status":"current"},"name":"Root-to-shoot ratio, Tropical rainforest forest, Asia (natural, AGB ≤ 125 t/ha)","output":{"quantity":"root_shoot_ratio"},"expression":"0.207","published":{"expression":"0.207","units":{},"output_unit":"unitless"},"taxon":{"level":"mixed","name":"Tropical rainforest forest trees","group":"mixed"},"region":{"scope":"continental","countries":[],"place":"Asia; Tropical rainforest ecological zone (FAO 2015 Global Ecological Zones)","biomes":["tropical"]},"stand":"natural","fit":{},"evidence":[{"field":"expression","quote":"Tropical rainforest | Asia | Natural ≤ 125 0.207 0.072 SD 6, 7, 8","locator":"Table 4.4 (Updated), p. 4.18"},{"field":"output","quote":"RATIO OF BELOW-GROUND BIOMASS TO ABOVE-GROUND BIOMASS (R) [TONNE ROOT D.M. (TONNE SHOOT D.M.)-1]","locator":"Table 4.4 (Updated) title, p. 4.18"}],"check":[{"inputs":{"AGB":500},"expected":0.207,"origin":"published","note":"constant ratio printed in Table 4.4 (Updated), p. 4.18; independent of tree AGB"}],"verification":"original_read","checked_at":"2026-11-01","notes":"IPCC Tier 1 default R (root d.m. / shoot d.m.). Applies to stands with above-ground biomass ≤ 125 tonnes/ha: the threshold is stand-level (t/ha), not tree AGB, so it cannot be expressed in the tree-level expression. Uncertainty SD 0.072. Table references: 6, 7, 8 (12 = Mokany et al. 2006). Multiply tree AGB by R to estimate BGB."}