Canadian Forest Service Publications
Vertical distribution of Xiphinema bakeri nematodes in soil in a Douglas-fir nursery. 1974. Sutherland, J.R. Canadian Journal of Forest Research 4(2): 175-178.
Issued by: Pacific Forestry Centre
Catalog ID: 1543
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Soil samples were collected throughout the year to determine the vertical distribution of Xiphinemabakeri nematodes in soil in a Douglas-fir [Pseudotsugamenziesii (Mirb.) Franco] nursery and to monitor seasonal changes in nematode distribution pattern. Root distribution, moisture content, available pore space, and osmotic pressure were also determined for soil samples taken at various depths to see if they were related to nematode distribution. More than 90% of the nematodes were present in the upper 20 cm of soil, especially from 0 to 10 cm, and this percentage did not change with season. Nematode distribution was related only to root distribution. The significance of the results for nematode control practices is discussed.