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Laminated Root Rot in a Western Washington Plantation : 8-Year Mortality and Growth of Douglas-Fir as Related to Infected Stumps, Tree Density, and Fertilization / Richard E. Miller, et al.
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- Book
- Government document
- Author/Creator:
- Miller, Richard E., 1932-2021
- Series:
- Research paper PNW ; 569.
- Research paper PNW ; 569
- Language:
- English
- Subjects (All):
- Root rots--Washington (State).
- Root rots.
- Washington (State).
- Physical Description:
- 1 online resource (48 pages)
- Place of Publication:
- [Washington, D.C.] : United States Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2006]
- Summary:
- A 4-year-old Douglas-fir plantation in the western Washington Cascades was monitored for 8 years after fertilization with potassium (K), nitrogen (N), and K+N to determine fertilizer effects on rates of mortality from laminated root rot (LRR) and other causes relative to a nonfertilized control. Each element was applied at a rate of 300 lb/acre on and around 0.2-acre plots replicated seven times in a randomized complete block design. Cumulative mortality from LRR did not differ significantly among fertilizer treatments, and losses were strongly related to density of infected stumps from the previous stand (r2 = 0.74). Mortality from disease and other sources accelerated during the 8 years of monitoring. Average tree growth and stand volume were greatest in treatment N and were reduced where N was combined with K. Continued monitoring is needed to identify potential longer term effects of the fertilizer treatments on susceptibility of Douglas-fir to LRR and Armillaria spp.
- Notes:
- Title from title screen (viewed on February 1, 2007).
- "November 2006."
- "PNW-RP-569."
- Includes bibliographical references.
- Electronic reproduction. [Place of publication not identified] : HathiTrust Digital Library, 2010.
- Other Format:
- Print version: Miller, Richard E. Laminated root rot in a western Washington plantation.
- OCLC:
- 81148639
- Access Restriction:
- Use copy Restrictions unspecified
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