Helena National Forest, 1996     (Updated:  1 November 2000)
Net volume, net annual growth, and annual mortality of growing stock trees (5.0" DBH and greater) on total forest land, nonreserved and suitable forest land  (Data in cubic feet)
  Total forest land NONRESERVED forest land SUITABLE forest land
Species Volume Growth Mortality Volume Growth Mortality Volume Growth Mortality
Lodgepole pine 780,781,467 10,168,103 2,927,633 732,893,993 9,258,806 2,699,930 344,377,127 3,710,862 1,190,471
Douglas-fir 638,609,198 7,788,858 2,608,004 600,199,103 7,417,143 2,608,004 274,520,507 2,555,186 1,947,848
Whitebark pine 73,516,483 647,945 423,713 54,725,875 308,112 423,713 13,403,528 -320,362 423,713
Subalpine fir 72,494,927 1,803,560 860,688 64,583,397 1,911,396 618,700 21,409,509 80,212 251,390
Engelmann spruce 67,017,486 -1,178,255 2,092,236 45,009,909 -1,019,582 1,605,911 28,334,024 -1,048,763 1,425,106
Ponderosa pine 63,360,538 710,428 134,323 63,360,538 710,428 134,323 28,143,738 269,124 --
Limber pine 12,964,848 218,603 -- 12,212,309 198,432 -- 508,956 1,732 --
Subalpine larch 1,996,229 42,599 -- -- -- -- -- -- --
Aspen 837,175 12,585 -- 837,175 12,585 -- -- -- --
Total 1,711,578,350 20,214,425 9,046,597 1,573,822,300 18,797,319 8,090,582 710,697,387 5,247,991 5,238,527
Standard Error* 6.9 17.1 27.4 7.1 17.3 28.3 15.7 43.6 40.4
*Percent of total