Shade from Brush Increases Survival of Planted Douglas-Fir
Abstract:Survival of 3-0 Douglas-fir seedlings planted in south-central New Mexico before the extremely dry spring of 1974 averaged 42 percent by the end of June. Inspection revealed that survival averaged 38 percent for seedlings having no brash competition, and 67 percent for seedlings having heavy brash competition. The shade associated with the brush, and its concurrent effect of lowering seedling transpiration stress, is the probable explanation for the increased survival. Survival averaged form 35 percent for seedlings receiving no shade to 79 percent for those receiving shade from brush all day. Shade provided by logs, snags, or other material might allow even higher survival because there would not be the soil-moisture competition that occurs with brush.
Document Type: Journal Article
Affiliations: Assistant Professor, Department of Forestry, Michigan Technological University, Houghton
Publication date: November 1, 1975
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