Table 17.4a. Relative standard errors (%) of total above-ground biomass on forest land by forest type, age class and managed forest region in Canada.
Managed forests Forest type Age (years) Total
1-20 21-40 41-60 61-80 81-100 101-120 121-140 141-160 161-180 181-200 201+ Other1
0 Non-treed 110.73 99.47 66.92 83.80 - - - - - - - 24.80 24.54
Treed Mixedwood 42.02 39.46 33.31 46.79 90.64 73.62 83.66 75.15 - - 97.10 - 55.16
Treed Coniferous 52.26 23.22 21.03 35.88 32.67 26.70 28.55 49.98 57.51 35.26 9.64 - 9.91
Treed Broadleaf 58.33 51.54 26.19 47.03 58.26 97.16 99.23 - - - 100.99 - 66.66
Subtotal 36.22 32.41 15.33 24.77 60.10 87.57 27.43 49.22 57.51 35.26 9.63 24.80 29.46
11 Non-treed 34.40 48.47 43.65 40.00 30.77 29.34 59.68 72.22 99.85 99.57 99.98 4.00 8.84
Treed Broadleaf 8.15 5.55 5.53 4.95 4.80 7.64 13.04 19.41 38.13 53.90 43.66 - 2.48
Treed Mixedwood 5.74 4.21 4.38 3.80 3.92 7.01 7.18 10.22 19.39 35.85 21.84 - 1.85
Treed Coniferous 5.23 3.69 3.83 3.17 2.79 3.62 3.18 4.73 5.69 7.29 4.64 - 1.43
Subtotal 3.53 2.53 2.62 2.25 2.08 2.95 2.89 4.27 5.42 7.10 4.61 4.00 1.09
12 Non-treed 57.24 46.42 85.20 87.39 69.67 99.82 - - - - - 11.40 11.06
Treed Mixedwood 18.02 13.20 12.62 12.00 11.93 23.43 23.05 54.30 64.79 99.82 54.62 - 6.26
Treed Broadleaf 18.61 18.72 15.84 10.92 14.40 31.38 36.49 51.51 85.94 99.43 96.34 - 6.60
Treed Coniferous 15.29 9.18 9.31 7.54 7.39 11.26 11.83 14.49 18.38 25.99 21.12 - 3.70
Subtotal 9.97 7.42 6.95 5.52 5.89 9.68 10.30 14.24 17.64 25.28 20.85 11.40 2.89
13 Non-treed 85.58 44.32 53.15 47.93 33.81 39.85 99.99 99.99 - - - 5.18 10.15
Treed Broadleaf 13.85 16.60 14.93 13.36 9.28 9.42 37.86 56.69 - 67.36 - - 5.54
Treed Mixedwood 11.72 9.39 9.07 9.67 7.58 6.48 8.14 44.74 76.83 65.16 100.03 - 3.61
Treed Coniferous 9.96 5.10 4.43 4.42 3.88 2.77 3.08 4.09 19.72 33.54 19.79 - 1.48
Subtotal 6.95 4.48 4.01 3.85 3.22 2.56 2.96 4.07 19.49 27.46 19.61 5.18 1.34
20 Non-treed 71.97 83.60 80.48 - 90.60 92.77 100.32 - - - - 14.37 13.84
Treed Broadleaf 17.61 14.56 10.73 10.54 11.00 18.73 31.74 40.40 66.92 85.49 61.19 - 5.40
Treed Mixedwood 26.49 10.74 10.10 7.59 10.24 14.82 18.04 26.38 38.11 48.75 64.11 - 4.49
Treed Coniferous 15.33 8.30 7.53 6.08 5.73 6.25 6.25 11.10 14.75 15.20 8.55 - 2.94
Subtotal 11.28 6.12 5.29 4.51 4.56 5.57 5.90 10.45 14.42 14.88 8.50 14.37 2.40
31 Non-treed - - - - - - - - - - - 39.13 39.13
Treed Mixedwood 86.92 31.79 31.38 29.84 28.04 38.98 37.86 83.11 99.59 - - - 16.73
Treed Broadleaf 28.00 28.52 22.04 43.69 52.67 45.60 99.74 - - - - - 20.27
Treed Coniferous 56.23 24.37 38.42 19.50 22.57 27.48 39.95 30.88 66.23 78.99 31.88 - 10.88
Subtotal 24.41 17.77 22.00 19.74 22.24 20.30 34.36 30.79 65.07 78.99 31.88 39.13 8.81
32 Non-treed 84.80 97.97 82.40 99.06 74.26 - - - - - - 40.77 40.30
Treed Mixedwood 32.59 25.69 22.95 29.49 32.87 40.60 39.69 98.99 - - 98.34 - 14.87
Treed Broadleaf 34.46 17.44 18.75 28.64 34.46 38.52 67.22 99.12 - 99.54 - - 10.74
Treed Coniferous 46.96 38.52 24.32 24.59 12.98 23.63 27.72 38.66 50.91 56.96 34.95 - 9.64
Subtotal 28.43 16.62 12.67 15.98 14.12 18.62 21.96 35.62 50.91 49.45 33.85 40.77 6.50
33 Non-treed 55.61 72.22 60.98 80.25 99.90 59.56 99.81 99.69 - - - 14.71 14.31
Treed Mixedwood 23.27 22.16 24.01 19.85 20.77 27.92 28.41 30.42 51.09 100.22 51.67 - 9.12
Treed Broadleaf 24.07 19.03 20.84 18.86 20.51 28.57 36.97 58.79 67.65 85.50 64.68 - 9.28
Treed Coniferous 20.03 14.71 17.62 11.05 11.72 14.80 10.45 15.27 16.66 17.44 11.73 - 4.96
Subtotal 13.21 11.14 12.04 8.60 9.47 12.24 9.90 14.22 16.26 17.12 11.65 14.71 4.21
40 Non-treed - 100.76 77.65 68.09 85.65 - 89.95 - - - - 33.42 40.90
Treed Broadleaf 32.37 30.85 39.59 56.19 25.28 18.79 74.97 71.23 - - - - 15.79
Treed Mixedwood 38.32 48.37 30.52 29.88 27.51 18.81 25.38 61.13 96.31 - - - 12.26
Treed Coniferous 35.10 21.39 18.22 17.47 19.20 8.60 12.45 22.26 60.86 63.22 31.22 - 6.19
Subtotal 20.78 21.41 14.90 15.71 14.06 7.61 11.63 20.39 59.41 63.22 31.22 33.42 5.33
50 Non-treed 36.50 55.30 39.58 46.29 66.33 99.98 - - - - - 6.99 6.77
Treed Mixedwood 8.46 5.75 4.11 5.32 7.01 12.87 21.29 26.83 63.57 59.15 97.07 - 2.62
Treed Coniferous 10.45 8.18 8.98 8.00 9.41 11.38 24.22 20.03 26.65 36.60 24.21 - 4.21
Treed Broadleaf 7.64 5.22 4.89 4.98 6.15 12.34 22.64 30.99 62.50 71.56 58.24 - 2.61
Subtotal 4.98 3.73 3.37 3.39 4.24 7.14 16.74 14.50 24.22 32.78 23.45 6.99 1.83
100 Non-treed 74.14 84.56 92.22 100.37 55.38 97.66 101.74 - - - - 11.45 27.97
Treed Broadleaf 23.53 14.55 13.15 12.88 13.19 32.18 27.97 40.25 82.38 59.94 59.94 - 7.04
Treed Mixedwood 21.04 13.48 9.74 9.76 10.15 19.58 19.25 36.74 59.88 55.08 59.10 - 5.00
Treed Coniferous 24.60 10.97 8.45 9.29 8.41 9.28 7.57 12.16 46.27 27.85 15.58 - 3.47
Subtotal 13.59 7.97 5.97 6.37 6.21 8.29 6.95 11.40 42.25 24.05 14.94 11.45 2.74
Canada Non-treed 26.46 30.07 37.33 32.78 22.21 23.17 47.56 58.05 99.85 99.57 99.98 2.72 5.46
Treed Broadleaf 5.13 3.49 3.22 3.19 3.22 9.30 10.24 15.33 32.98 31.36 32.72 - 1.80
Treed Mixedwood 4.34 3.01 2.81 2.63 3.36 4.10 4.99 8.77 16.33 30.04 21.77 - 1.35
Treed Coniferous 3.91 2.50 2.48 2.12 1.91 1.94 1.98 2.86 4.83 5.81 3.66 - 0.91
Total 2.54 1.72 1.65 1.50 1.47 1.81 1.84 2.69 4.62 5.62 3.64 2.72 0.72
Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data (Version 3.1, October 2025) (http://nfi.nfis.org)
Note: The Arctic ecozones (Arctic Cordillera, Northern Arctic, Southern Arctic), and the Taiga Plains and Hudson Plains ecozones located in Nunavut, are not inventoried. These non-inventoried areas total 262,189.89 thousand ha.
1 Missing or unknown age class.
Managed forest
Code Description
0 Not available
11 Long term volume or area based Crown timber dispositions
12 Short term volume or area based Crown timber dispositions
13 No current Crown timber dispostions
20 Legal protection status (IUCN class IA, IB, II, III, IV, V, VI equivalent)
31 Reserved by the Federal government for military or other purposes
32 Reserved by the Federal government under the Indian Act
33 Reserved or designated restricted use by provincial or territorial government
40 Aboriginal lands
50 Privately-owned lands
100 Water