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Publications & Products

Carbon in United States Forests and Wood Products, 1987-1997: State-by-State Estimates
by Richard A. Birdsey & George M. Lewis

Idaho Estimate for 1987-1997

Table 1. Area by land class (1000 ac).
Land class	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Timberland	14,533	15,828	17,123	259	259	259
Other forest land	3,495	2,390	1,285	-221	-221	-221
Reserved timberland	3,790	3,660	3,529	-26	-26	-26
TOTAL	21,818	21,878	21,937	12	12	12

Table 2. Area of forest land by forest type (1000 ac).
Forest type	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Douglas-fir	6,586	7,053	7,520	93	93	93
Ponderosa pine	2,040	2,025	2,010	-3	-3	-3
Western white pine	226	176	126	-10	-10	-10
Fir-spruce	4,354	4,859	5,365	101	101	101
Hemlock-Sitka spruce	1,322	1,297	1,271	-5	-5	-5
Larch	890	552	213	-68	-68	-68
Lodgepole pine	3,154	3,049	2,943	-21	-21	-21
Redwood	0	0	0	0	0	0
Other Hardwoods	970	919	867	-10	-10	-10
Other forest types	1,079	921	763	-32	-32	-32
Pinyon-juniper	513	497	481	-3	-3	-3
Chaparral	0	0	0	0	0	0
Non-stocked	685	531	378	-31	-31	-31
Unused	0	0	0	0	0	0
TOTAL	21,818	21,878	21,937	12	12	12

Table 3. Total carbon stock on forest land and annual change by forest type (MMTC).
Forest type	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Douglas-fir	552.2	605.0	658.8	10.58	10.75	10.66
Ponderosa pine	161.4	155.1	148.2	-1.27	-1.37	-1.32
Western white pine	28.4	19.2	9.4	-1.83	-1.98	-1.90
Fir-spruce	412.2	459.8	505.8	9.51	9.20	9.36
Hemlock-Sitka spruce	129.4	132.6	135.5	0.63	0.59	0.61
Larch	103.5	65.5	26.1	-7.61	-7.87	-7.74
Lodgepole pine	227.4	221.0	213.5	-1.28	-1.50	-1.39
Redwood	0.0	0.0	0.0	0.00	0.00	0.00
Other Hardwoods	59.1	55.9	52.7	-0.64	-0.64	-0.64
Other forest types	75.8	64.4	52.8	-2.28	-2.31	-2.29
Pinyon-juniper	33.6	32.6	31.5	-0.21	-0.21	-0.21
Chaparral	0.0	0.0	0.0	0.00	0.00	0.00
Non-stocked	37.8	30.9	23.9	-1.38	-1.40	-1.39
Unused	0.0	0.0	0.0	0.00	0.00	0.00
TOTAL	1,820.8	1,841.9	1,858.2	4.22	3.26	3.74

Table 4. Total carbon stock on forest land and annual change by accounting component (MMTC).
Accounting component	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Biomass	574.6	592.4	610.1	3.55	3.55	3.55
Forest floor and coarse woody debris	361.9	358.7	354.1	-0.63	-0.94	-0.78
Soils	788.6	786.0	783.4	-0.52	-0.52	-0.52
Wood products and landfills	95.7	104.8	110.6	1.82	1.16	1.49
TOTAL	1,820.8	1,841.9	1,858.2	4.22	3.26	3.74

Table 5. Total carbon stock on forest land and annual change by owner (MMTC).
Owner group	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
National Forest	1,347.2	1,368.3	1,384.9	4.21	3.32	3.77
Other Public	187.8	182.6	177.2	-1.04	-1.07	-1.05
Forest Industry	116.6	121.8	126.7	1.03	0.98	1.01
Other Private	169.2	169.2	169.3	0.02	0.02	0.02
TOTAL	1,820.8	1,841.9	1,858.2	4.22	3.26	3.74

Table 6. Change in total carbon stock on forest land attributed to land use change (MMTC).
Accounting component	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Biomass	0.0	-0.3	-0.3	-0.05	0.00	-0.03
Forest floor and coarse woody debris	0.0	-0.2	-0.4	-0.04	-0.04	-0.04
Soils	0.0	-0.1	0.0	-0.02	0.02	0.00
Wood products and landfills	0.0	0.4	0.7	0.07	0.08	0.07
TOTAL	0.0	-0.2	0.0	-0.05	0.05	0.00

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