Pacific Southwest

Title: Three studies on ponderosa pine management on the Warm Springs Indian Reservation: stocking control in uneven-aged stands, forest products from fire-damage trees, and fuels reduction

Author: Arena, John V.

Date: 2005

Source: In: Ritchie, Martin W.; Maguire, Douglas A.; Youngblood, Andrew, tech. coordinators. Proceedings of the Symposium on Ponderosa Pine: Issues, Trends, and Management, 2004 October 18-21, Klamath Falls, OR. Gen. Tech. Rep PSW-GTR-198. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 259-265

Station ID: GTR-PSW-198

Description: Over 60,000 acres of ponderosa pine (Pinus ponderosa P. and C. Lawson) forest on the Warm Springs Indian Reservation (WSIR) in Oregon are managed using an uneven-age system. Three on-going studies on WSIR address current issues in the management of pine forests: determining levels of growing stock for uneven-age management, fire effects on wood suitability for engineered wood products, and mechanical forest fuel reduction alternatives. To evaluate various levels of growing stock, WSIR installed twelve 1.01-hectare plots in four areas of the ponderosa pine forest to test three basal area density levels: 8.0 m²ha^-1 (35 ft²ac^-1), 11.0 m²ha^-1 (48 ft²ac^-1) and 14.0 m²ha^-1 (61 ft²ac^-1). All plots were measured four times over a fifteen-year period. Preliminary results show the variation in periodic basal area growth. Future treatments are planned for 2005 to impose new density levels for the next 20 years. A study of fire effects on wood quality was initiated to compare the strength of recently burned small-diameter ponderosa pine to the strength of unburned, green, small-diameter ponderosa pine. Small logs were shipped to Mississippi State University to test their performance as engineered wood products. A mechanical forest fuel reduction study was designed to compare the effectiveness of two methods for reducing understory conifers, shrubs, and downed fuel. Soil disturbance (both visual classification and soil compaction), machine productivity, system cost, and their ability to treat certain various fuel types will be compared in an 32 ha. (80 ac.) ponderosa pine unit.

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Citation

Arena, John V.  2005.  Three studies on ponderosa pine management on the Warm Springs Indian Reservation: stocking control in uneven-aged stands, forest products from fire-damage trees, and fuels reduction.   In: Ritchie, Martin W.; Maguire, Douglas A.; Youngblood, Andrew, tech. coordinators. Proceedings of the Symposium on Ponderosa Pine: Issues, Trends, and Management, 2004 October 18-21, Klamath Falls, OR. Gen. Tech. Rep PSW-GTR-198. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 259-265.