Microclimatic conditions associated with Douglas-fir needle-tip die-back were investigated in two container greenhouses operated by Canadian International Paper Inc. in Saanichton B.C. Emphasis was on maximum soil temperature in different types of growing media. The effects on soil temperature of two kinds of grit cover were also examined. The lack of significant levels of needle-tip die-back prevented any direct associations to be made between microclimate and the disease. However, the soil temperature environment was described and a relationship between ambient and soil temperature was determined.
Peterson, M.J., Tuller, S.E.. 1987. Die-back of Container-Grown Douglas-fir Seedlings: Associated Microclimate. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. FRDA Research Report. FRR35
Topic: FLNRORD Research Program
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