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UBC Theses and Dissertations

Soils and soil capability classification for forestry of the Mission Tree Farm Kowall, Ronald C.


A study of the soils and soil capability classification for forestry of the Mission Tree Farm Licence No. 26 was carried out. The soil survey and soil chemical analyses were done in cooperation with the British Columbia Department of Agriculture, Soils Division, Kelowna, B. C. The purposes of the study were: to characterize the soils found in Compartment One, to determine the forest capability of these soils, to recommend management practices for these soils for forestry purposes, and to compare soil mapping at scales of 1:12,000, 1:15,840, 1:31,680, and 1:63,360. Fourteen soil series were recognized and used as criteria for the mapping units in this area. Ten soil series were established, described, and chemically characterized. Although the soil series could be morphologically recognized in the field, the chemical analyses exhibited very little characteristic differences among the series. Vegetation could not be used consistently as criteria for differentiating among the various mapping units. Landform was the chief aid in establishing the extent of the soil mapping units. Each soil series was rated for capability to produce commercial forest growth. The major tree species involved were western hemlock, Douglas-fir, and western red cedar. The soils were evaluated for forest management practices including, reforestation, road building, erodibility, logging practices, and species adaptation to specific soils. Four scales of mapping were compared and discussed in relation to their uses for specific purposes. For an area such as Compartment One on which good forest management is being practiced, mapping at the scale of 1:15,840 was ideal.

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