Forest Habitat Types of Northern Idaho
PRODUCTIVITY/MANAGEMENT AND SOILS EXCERPTS
[Excerpted from: Cooper, Stephen V.; Neiman, Kenneth E.; Roberts, David W. Rev. 1991. Forest habitat types of northern Idaho: a second approximation. Gen. Tech. Rep. INT-236. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 143 p.]
APPENDIX D: SUBSTRATE FEATURES OF NORTHERN IDAHO HABITAT TYPES
(Appendix D originally contained a large table divided into three printed pages. That table has been further divided here to make them more presentable/accessible as web pages.)
Description/Glossary of terms in Appendix D
- Tsuga heterophylla (TSHE) Series, coarse fragment rock types (percent of stands)
- Tsuga heterophylla (TSHE) Series, substrate characteristics
- Thuja plicata (THPL) Series, set 1, coarse fragment rock types (percent of stands)
- Thuja plicata (THPL) Series, set 1, substrate characteristics
- Thuja plicata (THPL) Series, set 2, coarse fragment rock types (percent of stands)
- Thuja plicata (THPL) Series, set 2, substrate characteristics
- Tsuga mertensiana (TSME) Series, coarse fragment rock types (percent of stands)
- Tsuga mertensiana (TSME) Series, substrate characteristics
- Abies lasiocarpa (ABLA) Series, set 1, coarse fragment rock types (percent of stands)
- Abies lasiocarpa (ABLA) Series, set 1, substrate characteristics
- Abies lasiocarpa (ABLA) Series, set 2, coarse fragment rock types (percent of stands)
- Abies lasiocarpa (ABLA) Series, set 2, substrate characteristics
- Abies grandis (ABGR) Series, set 1, coarse fragment rock types (percent of stands)
- Abies grandis (ABGR) Series, set 1, substrate characteristics
- Abies grandis (ABGR) Series, set 2, coarse fragment rock types (percent of stands)
- Abies grandis (ABGR) Series, set 2, substrate characteristics
- Pseudotsuga menziesii (PSME) Series, coarse fragment rock types (percent of stands)
- Pseudotsuga menziesii (PSME) Series, substrate characteristics
Description/Glossary of terms in Appendix D
The following table presents soils data by habitat type and phase in format similar to that for vegetative data. Coarse-fragment rock types are expressed as a percentage of the stands in which a given rock type was the material in a substantial portion of the plots, are noted only in the h.t. soils section narrative because their contribution could not be unambiguously ascertained. Textural classes are also shown as a percentage of stands having a given soil texture. Mean values (x) are presented for all other data categories. “Upper profile” and “lower profile” are arbitrarily defined respectively as (1) that profile portion including any A horizon or the uppermost horizon if an A horizon is not present and (2) that root-containing portion of the profile above the C or R horizons and below the “upper profile”; both terms may express an average of more than one horizon. The terminology diagramed below and, used in the narratives is based primarily on USDA Soil Conservation Service (1975) definitions, with some modifications.
- SURFACE ROCK EXPOSED (includes cobbles, stones, and fixed rock; material >3 inches [7.6 cm] diameter)
- little = 0–5 percent
- moderate = 5–15 percent
- considerable = >15 percent
- BARE SOIL EXPOSED (includes soil and gravel; material <3 inches [7.6 cm])
- little = 0–5 percent
- moderate = 5–15 percent
- considerable = >15 percent
- DUFF DEPTH
- shallow = 0–2 centimeters
- moderate = 2–4 centimeters
- considerable = 4–8+ centimeters
- GRAVEL CONTENT
- nongravelly = 0–20 percent (by volume)
- gravelly = 20–50 percent (by volume)
- very gravelly = >50 percent (by volume)
- REACTION (pH units)
- extremely acidic = 4.0–4.5 pH
- very strongly acidic = 4.5–5.0 pH
- strongly acidic = 5.0–5.5 pH
- moderately acidic = 5.5–6.0 pH
- slightly acidic = 6.0–6.5 pH
- neutral = 6.5–7.2 pH
- mildly basic (alkaline) = 7.2–7.5 pH
Data Tables
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