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

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



1. Tsuga heterophylla (TSHE) Series, coarse fragment rock types (percent of stands) 
Soil Characteristics GYDR
h.t.,
n=6
ASCA
h.t.,
ARNU
phase,
n=4
ASCA
h.t.,
MEFE
phase,
n=3
ASCA
h.t.,
CLUN
phase,
n=15
CLUN
h.t.,
ARNU
phase,
n=6
CLUN
h.t.,
MEFE
phase,
n=4
CLUN
h.t.,
CLUN
phase,
n=16
Sedimentary
Calcareous -- -- -- -- -- -- --
Noncalcareous 50 -- 67 13 -- -- 19
Metamorphic
Argillite -- -- -- -- -- -- --
Quartzite 17 -- 33 27 -- 50 25
Gneiss & schist & phyllite -- -- -- -- -- -- --
Miscellaneous -- -- -- -- -- -- --
Igneous
Basalt & andesite -- -- -- -- -- -- --
Dacite, trachyte, & latite -- -- -- -- -- -- --
Rhyolite -- -- -- -- -- -- --
Other volcanics -- -- -- 7 -- 25 --
Quartz monzonite & granitic -- -- -- -- -- -- --
Granitics (undifferentiated) -- -- -- 13 -- 25 25
Miscellaneous -- -- -- -- -- -- --
Mixed (e.g., alluvium, glacial till) 33 100 -- 40 100 -- 31

2. Tsuga heterophylla (TSHE) Series, substrate characteristics 
Soil Characteristics GYDR
h.t.,
n=6
ASCA
h.t.,
ARNU
phase,
n=4
ASCA
h.t.,
MEFE
phase,
n=3
ASCA
h.t.,
CLUN
phase,
n=15
CLUN
h.t.,
ARNU
phase,
n=6
CLUN
h.t.,
MEFE
phase,
n=4
CLUN
h.t.,
CLUN
phase,
n=16
EFFECTIVE ROOTING DEPTH (x in cm) 56 35 42 38 56 55 45
EXPOSED ROCK (x in %) 0 <1 <1 <1 0 <1 <1
EXPOSED SOIL (x in %) 0 0 <1 <1 0 0 <1
DUFF DEPTH (x in cm) 5.6 3.0 5.0 4.0 4.4 4.3 5.6
GRAVEL CONTENT UPPER PROFILE (x in %) 8 32 5 20 2 24 15
GRAVEL CONTENT LOWER PROFILE (x in %) 8 40 55 41 14 44 24
REACTION UPPER PROFILE (x pH) 6.0 5.4 5.4 6.1 6.0 5.9 5.6
REACTION LOWER PROFILE (x pH) 6.1 5.8 5.7 6.0 6.3 5.7 6.1
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- -- -- -- -- -- --
Sandy loam -- 25 -- -- -- -- --
Loam 17 25 -- 13 -- -- --
Silt loam & silt 67 50 100 67 60 100 --
Silty clay loam & clay loam 17 -- -- 20 40 -- 25


3. Thuja plicata (THPL) Series, set 1, coarse fragment rock types (percent of stands) 
Soil Characteristics OPHO
h.t.,
n=4
ATFI
h.t.,
ATFI
phase,
n=6
ATFI
h.t.,
ADPE
phase,
n=2
ADPE
h.t.,
n=4
GYDR
h.t.,
n=4
Sedimentary
Calcareous -- -- -- -- --
Noncalcareous -- 33 -- 25 25
Metamorphic
Argillite -- -- -- -- --
Quartzite -- 50 -- -- 75
Gneiss & schist & phyllite -- -- -- 75 --
Miscellaneous -- -- -- -- --
Igneous
Basalt & andesite -- -- -- -- --
Dacite, trachyte, & latite -- -- -- -- --
Rhyolite -- -- -- -- --
Other volcanics -- -- -- -- --
Quartz monzonite & granitic -- -- -- -- --
Granitics (undifferentiated) -- 16 -- -- --
Miscellaneous -- -- -- -- --
Mixed (e.g., alluvium, glacial till) 100 -- 100 -- --

4. Thuja plicata (THPL) Series, set 1, substrate characteristics 
Soil Characteristics OPHO
h.t.,
n=4
ATFI
h.t.,
ATFI
phase,
n=6
ATFI
h.t.,
ADPE
phase,
n=2
ADPE
h.t.,
n=4
GYDR
h.t.,
n=4
EFFECTIVE ROOTING DEPTH (x in cm) 31 34 100 62 45
EXPOSED ROCK (x in %) 0 0 0 0 <1
EXPOSED SOIL (x in %) 0 0 0 <1 0
DUFF DEPTH (x in cm) 4.0 5.4 4.8 4.2 8.1
GRAVEL CONTENT UPPER PROFILE (x in %) 16 10 5 5 25
GRAVEL CONTENT LOWER PROFILE (x in %) 40 25 5 5 43
REACTION UPPER PROFILE (x pH) 5.7 5.7 6.4 6.5 6.2
REACTION LOWER PROFILE (x pH) 5.7 5.6 6.6 6.1 6.3
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- 33 -- 25 --
Sandy loam 25 -- -- -- --
Loam 25 -- -- -- --
Silt loam & silt 50 16 100 75 75
Silty clay loam & clay loam -- 50 -- -- 25


5. Thuja plicata (THPL) Series, set 2, coarse fragment rock types (percent of stands) 
Soil Characteristics ASCA
h.t.,
MEFE
phase,
n=5
ASCA
h.t.,
TABR
phase,
n=2
ASCA
h.t.,
ASCA
phase,
n=11
CLUN
h.t.,
MEFE
phase,
n=3
CLUN
h.t.,
XETE
phase,
n=3
CLUN
h.t.,
CLUN
phase,
n=6
Sedimentary
Calcareous -- -- -- -- -- --
Noncalcareous -- -- 9 -- 33 17
Metamorphic
Argillite -- 100 27 33 -- --
Quartzite 60 -- 18 67 67 50
Gneiss & schist & phyllite 40 -- 18 -- -- 33
Miscellaneous -- -- 9 -- -- --
Igneous
Basalt & andesite -- -- -- -- -- --
Dacite, trachyte, & latite -- -- -- -- -- --
Rhyolite -- -- -- -- -- --
Other volcanics -- -- 9 -- -- --
Quartz monzonite & granitic -- -- -- -- -- --
Granitics (undifferentiated) -- -- -- -- -- --
Miscellaneous -- -- -- -- -- --
Mixed (e.g., alluvium, glacial till) -- -- 9 -- -- --

6. Thuja plicata (THPL) Series, set 2, substrate characteristics 
Soil Characteristics ASCA
h.t.,
MEFE
phase,
n=5
ASCA
h.t.,
TABR
phase,
n=2
ASCA
h.t.,
ASCA
phase,
n=11
CLUN
h.t.,
MEFE
phase,
n=3
CLUN
h.t.,
XETE
phase,
n=3
CLUN
h.t.,
CLUN
phase,
n=6
EFFECTIVE ROOTING DEPTH (x in cm) 46 56 50 41 43 61
EXPOSED ROCK (x in %) 0 0 0 <1 <1 0
EXPOSED SOIL (x in %) 0 0 0 0 <1 0
DUFF DEPTH (x in cm) 4.5 5.3 5.2 5.1 5.1 4.7
GRAVEL CONTENT UPPER PROFILE (x in %) 13 3 20 22 15 11
GRAVEL CONTENT LOWER PROFILE (x in %) 31 7 25 50 35 12
REACTION UPPER PROFILE (x pH) 6.1 6.4 6.4 5.7 6.1 6.5
REACTION LOWER PROFILE (x pH) 6.2 6.2 6.4 5.9 5.8 6.3
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- -- 9 -- -- --
Sandy loam -- -- -- -- -- 17
Loam -- 50 18 -- -- 17
Silt loam & silt 40 50 64 67 100 33
Silty clay loam & clay loam 60 -- 9 33 -- 33


7. Tsuga mertensiana (TSME) Series, coarse fragment rock types (percent of stands) 
Soil Characteristics STAM
h.t.,
MEFE
phase,
n=3
CLUN
h.t.,
MEFE
phase,
n=10
CLUN
h.t.,
XETE
phase,
n=4
MEFE
h.t.,
XETE
phase,
n=4
MEFE
h.t.,
LUHI
phase,
n=9
XETE
h.t.,
XETE
phase,
n=7
XETE
h.t.,
VASC
phase,
n=13
XETE
h.t.,
LUHI
phase,
n=7
Sedimentary
Calcareous -- -- -- -- -- -- -- --
Noncalcareous -- 10 -- -- 22 -- -- --
Metamorphic
Argillite 33 20 -- -- -- 29 -- --
Quartzite -- 30 75 -- 22 43 31 43
Gneiss & schist & phyllite 33 -- -- 50, 25 22 -- 23 14
Miscellaneous 33 10 25 -- -- 14 8 --
Igneous
Basalt & andesite -- -- -- -- -- -- -- --
Dacite, trachyte, & latite -- -- -- -- -- -- -- --
Rhyolite -- -- -- -- -- -- -- --
Other volcanics -- -- -- -- -- -- -- --
Quartz monzonite & granitic -- -- -- -- -- -- -- --
Granitics (undifferentiated) -- 30 -- 50 33 14 38 43
Miscellaneous -- -- -- -- -- -- -- --
Mixed (e.g., alluvium, glacial till) -- -- -- -- -- -- -- --

8. Tsuga mertensiana (TSME) Series, substrate characteristics 
Soil Characteristics STAM
h.t.,
MEFE
phase,
n=3
CLUN
h.t.,
MEFE
phase,
n=10
CLUN
h.t.,
XETE
phase,
n=4
MEFE
h.t.,
XETE
phase,
n=4
MEFE
h.t.,
LUHI
phase,
n=9
XETE
h.t.,
XETE
phase,
n=7
XETE
h.t.,
VASC
phase,
n=13
XETE
h.t.,
LUHI
phase,
n=7
EFFECTIVE ROOTING DEPTH (x in cm) 55 49 38 -- 33 46 39 37
EXPOSED ROCK (x in %) 0 1 <1 <1 1 1 2 1
EXPOSED SOIL (x in %) <1 <1 <1 0 <1 <1 2 <1
DUFF DEPTH (x in cm) 2.6 3.0 2.7 2.9 2.7 2.2 2.2 2.3
GRAVEL CONTENT UPPER PROFILE (x in %) 30 10 21 15 15 23 12 22
GRAVEL CONTENT LOWER PROFILE (x in %) 47 17 32 22 20 34 23 32
REACTION UPPER PROFILE (x pH) 5.2 5.7 5.4 5.2 4.5 5.1 5.0 5.1
REACTION LOWER PROFILE (x pH) 5.5 5.6 5.4 6.0 5.4 5.7 5.6 5.6
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand 33 -- -- -- -- -- 8 14
Sandy loam -- -- -- -- -- -- 8 --
Loam -- 20 25 50 27 43 -- --
Silt loam & silt 67 70 50 50 54 57 58 57
Silty clay loam & clay loam -- 10 25 -- 18 -- 25 29


9. Abies lasiocarpa (ABLA) Series, set 1, coarse fragment rock types (percent of stands) 
Soil Characteristics CACA
h.t.,
LEGL
phase,
n=4
CACA
h.t.,
VACA
phase,
n=2
STAM
h.t.,
MEFE
phase,
n=9
STAM
h.t.,
LICA
phase,
n=8
CLUN
h.t.,
MEFE
phase,
n=6
CLUN
h.t.,
XETE
phase,
n=6
MEFE
h.t.,
COOC
phase,
n=4
MEFE
h.t.,
LUHI
phase,
n=4
Sedimentary
Calcareous -- -- -- -- -- -- -- --
Noncalcareous -- -- -- 38 -- -- -- --
Metamorphic
Argillite -- -- -- -- -- -- -- --
Quartzite -- -- 11 -- 17 33 -- --
Gneiss & schist & phyllite -- -- -- 25 17 17 25 --
Miscellaneous -- -- -- -- -- -- -- --
Igneous
Basalt & andesite -- -- -- -- -- 17 -- --
Dacite, trachyte, & latite -- -- -- -- -- -- -- --
Rhyolite -- -- -- -- -- -- -- --
Other volcanics -- -- -- 12 -- -- -- --
Quartz monzonite & granitic -- -- -- -- -- -- -- --
Granitics (undifferentiated) 100 50 66 12 67 17 75 100
Miscellaneous -- -- -- -- -- 17 -- --
Mixed (e.g., alluvium, glacial till) -- 50 33 12 -- -- -- --

10. Abies lasiocarpa (ABLA) Series, set 1, substrate characteristics 
Soil Characteristics CACA
h.t.,
LEGL
phase,
n=4
CACA
h.t.,
VACA
phase,
n=2
STAM
h.t.,
MEFE
phase,
n=9
STAM
h.t.,
LICA
phase,
n=8
CLUN
h.t.,
MEFE
phase,
n=6
CLUN
h.t.,
XETE
phase,
n=6
MEFE
h.t.,
COOC
phase,
n=4
MEFE
h.t.,
LUHI
phase,
n=4
EFFECTIVE ROOTING DEPTH (x in cm) 37 57 36 39 57 45 46 38
EXPOSED ROCK (x in %) <1 <1 <1 <1 0 <1 <1 6
EXPOSED SOIL (x in %) 0 0 0 <1 0 0 1 0
DUFF DEPTH (x in cm) 2.2 2.5 3.7 3.3 3.4 2.8 3.2 1.1
GRAVEL CONTENT UPPER PROFILE (x in %) 13 15 16 14 21 16 -- 30
GRAVEL CONTENT LOWER PROFILE (x in %) 30 27 27 17 28 22 -- 60
REACTION UPPER PROFILE (x pH) 5.2 4.9 5.0 5.4 5.9 5.8 5.5 4.6
REACTION LOWER PROFILE (x pH) 5.7 5.6 5.5 5.6 5.9 5.6 5.8 5.3
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- -- 11 -- -- -- -- --
Sandy loam 50 -- -- 12 17 17 25 --
Loam 25 50 22 12 17 17 -- --
Silt loam & silt -- 50 67 63 50 50 75 100
Silty clay loam & clay loam 25 -- -- 12 17 17 -- --


11. Abies lasiocarpa (ABLA) Series, set 2, coarse fragment rock types (percent of stands) 
Soil Characteristics VACA
h.t.,
n=4
XETE
h.t.,
COOC
phase,
n=7
XETE
h.t.,
VAGL
phase,
n=4
XETE
h.t.,
VASC
phase,
n=10
XETE
h.t.,
LUHI
phase,
n=7
LUHI
h.t.,
n=3
Sedimentary
Calcareous -- -- -- -- -- --
Noncalcareous -- -- -- -- -- --
Metamorphic
Argillite -- -- -- -- -- --
Quartzite -- 14 25 -- -- --
Gneiss & schist & phyllite 25 28 25 -- 28 --
Miscellaneous -- -- -- 10 14 --
Igneous
Basalt & andesite -- -- -- -- -- --
Dacite, trachyte, & latite -- -- -- -- -- --
Rhyolite -- -- -- -- -- --
Other volcanics -- -- -- -- -- --
Quartz monzonite & granitic -- -- -- -- -- --
Granitics (undifferentiated) 50 57 50 80 57 100
Miscellaneous -- -- -- 10 -- --
Mixed (e.g., alluvium, glacial till) 25 -- -- -- -- --

12. Abies lasiocarpa (ABLA) Series, set 2, substrate characteristics 
Soil Characteristics VACA
h.t.,
n=4
XETE
h.t.,
COOC
phase,
n=7
XETE
h.t.,
VAGL
phase,
n=4
XETE
h.t.,
VASC
phase,
n=10
XETE
h.t.,
LUHI
phase,
n=7
LUHI
h.t.,
n=3
EFFECTIVE ROOTING DEPTH (x in cm) 41 41 50 48 33 32
EXPOSED ROCK (x in %) <1 <1 <1 1 1 <1
EXPOSED SOIL (x in %) 0 <1 0 2 2 <1
DUFF DEPTH (x in cm) 3.2 2.3 2.1 1.7 1.7 1.8
GRAVEL CONTENT UPPER PROFILE (x in %) 12 19 14 13 25 22
GRAVEL CONTENT LOWER PROFILE (x in %) 30 34 44 24 33 30
REACTION UPPER PROFILE (x pH) 5.9 5.9 5.8 5.6 5.0 4.5
REACTION LOWER PROFILE (x pH) 6.1 5.9 5.9 5.7 5.7 5.2
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- 43 25 20 28 --
Sandy loam 25 14 -- 10 -- --
Loam 75 -- 25 30 14 66
Silt loam & silt -- 14 50 40 57 33
Silty clay loam & clay loam -- 28 -- -- -- --


13. Abies grandis (ABGR) Series, set 1, coarse fragment rock types (percent of stands) 
Soil Characteristics ASCA
h.t.,
MEFE
phase,
n=4
ASCA
h.t.,
TABR
phase,
n=3
ASCA
h.t.,
ASCA
phase,
n=13
CLUN
h.t.,
MEFE
phase,
n=3
CLUN
h.t.,
TABR
phase,
n=2
CLUN
h.t.,
XETE
phase,
n=16
CLUN
h.t.,
PHMA
phase,
n=12
CLUN
h.t.,
CLUN
phase,
n=7
Sedimentary
Calcareous -- -- -- -- -- -- -- 14
Noncalcareous -- -- 8 -- -- 6 -- --
Metamorphic
Argillite -- -- 15 -- -- -- 8 14
Quartzite 50 -- 15 -- -- 31 16 29
Gneiss & schist & phyllite -- 66 8 33 -- 25 25 14
Miscellaneous -- -- 31 -- -- -- -- --
Igneous
Basalt & andesite -- -- 8 33 -- -- 8 --
Dacite, trachyte, & latite -- -- -- -- -- -- 16 --
Rhyolite -- -- -- -- -- -- 8 --
Other volcanics 50 -- -- -- -- 6 -- --
Quartz monzonite & granitic -- -- -- -- -- -- -- --
Granitics (undifferentiated) -- 33 8 33 100 31 8 29
Miscellaneous -- -- -- -- -- -- -- --
Mixed (e.g., alluvium, glacial till) -- -- 8 -- -- -- 8 --

14. Abies grandis (ABGR) Series, set 1, substrate characteristics 
Soil Characteristics ASCA
h.t.,
MEFE
phase,
n=4
ASCA
h.t.,
TABR
phase,
n=3
ASCA
h.t.,
ASCA
phase,
n=13
CLUN
h.t.,
MEFE
phase,
n=3
CLUN
h.t.,
TABR
phase,
n=2
CLUN
h.t.,
XETE
phase,
n=16
CLUN
h.t.,
PHMA
phase,
n=12
CLUN
h.t.,
CLUN
phase,
n=7
EFFECTIVE ROOTING DEPTH (x in cm) 67 66 50 60 70 52 44 40
EXPOSED ROCK (x in %) 0 0 <1 0 0 <1 <1 <1
EXPOSED SOIL (x in %) 0 0 <1 0 0 <1 <1 <1
DUFF DEPTH (x in cm) 5.5 5.3 4.6 4.7 5.1 4.2 4.1 4.3
GRAVEL CONTENT UPPER PROFILE (x in %) 14 1 14 5 5 18 17 20
GRAVEL CONTENT LOWER PROFILE (x in %) 24 3 19 5 15 30 25 32
REACTION UPPER PROFILE (x pH) 5.6 6.5 6.4 6.2 7.0 6.1 6.3 6.0
REACTION LOWER PROFILE (x pH) 6.0 6.1 6.1 6.1 6.9 6.1 6.1 5.9
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand 25 -- 8 -- -- 30 33 14
Sandy loam 25 -- 8 -- -- -- -- 29
Loam 25 33 8 33 50 8 8 29
Silt loam & silt 25 66 61 66 50 38 33 --
Silty clay loam & clay loam -- -- 16 -- -- 23 25 29


15. Abies grandis (ABGR) Series, set 2, coarse fragment rock types (percent of stands) 
Soil Characteristics LIBO
h.t.,
XETE
phase,
n=4
LIBO
h.t.,
LIBO
phase,
n=3
XETE
h.t.,
COOC
phase,
n=3
XETE
h.t.,
VAGL
phase,
n=10
PHMA
h.t.,
COOC
phase,
n=2
PHMA
h.t.,
PHMA
phase,
n=10
SPBE
h.t.,
n=3
Sedimentary
Calcareous -- -- -- -- -- -- --
Noncalcareous -- 33 -- -- -- -- 50
Metamorphic
Argillite -- -- -- -- -- 11 --
Quartzite 25 -- 33 20 -- 22 --
Gneiss & schist & phyllite -- -- -- -- -- -- --
Miscellaneous -- -- -- 10 -- -- --
Igneous
Basalt & andesite -- -- 33 10 -- 33 --
Dacite, trachyte, & latite -- -- -- -- -- -- --
Rhyolite -- -- -- -- -- 11 --
Other volcanics -- -- -- -- -- -- --
Quartz monzonite & granitic -- -- -- -- -- -- --
Granitics (undifferentiated) 75 -- 33 40 100 22 50
Miscellaneous -- -- -- -- -- -- --
Mixed (e.g., alluvium, glacial till) -- 67 -- 20 -- -- --

16. Abies grandis (ABGR) Series, set 2, substrate characteristics 
Soil Characteristics LIBO
h.t.,
XETE
phase,
n=4
LIBO
h.t.,
LIBO
phase,
n=3
XETE
h.t.,
COOC
phase,
n=3
XETE
h.t.,
VAGL
phase,
n=10
PHMA
h.t.,
COOC
phase,
n=2
PHMA
h.t.,
PHMA
phase,
n=10
SPBE
h.t.,
n=3
EFFECTIVE ROOTING DEPTH (x in cm) 45 51 52 44 36 48 52
EXPOSED ROCK (x in %) <1 <1 <1 <1 2 <1 <1
EXPOSED SOIL (x in %) <1 0 <1 <1 <1 <1 <1
DUFF DEPTH (x in cm) 3.6 4.6 4.3 3.2 4.2 3.5 2.5
GRAVEL CONTENT UPPER PROFILE (x in %) 28 20 35 15 35 25 20
GRAVEL CONTENT LOWER PROFILE (x in %) 40 42 30 35 45 30 25
REACTION UPPER PROFILE (x pH) 5.9 6.6 6.4 6.1 6.7 6.4 6.1
REACTION LOWER PROFILE (x pH) 5.9 6.8 6.0 6.0 6.7 6.1 6.3
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- -- 33 -- -- -- --
Sandy loam 25 -- -- -- 50 10 --
Loam 50 -- -- 22 -- 20 33
Silt loam & silt 25 33 -- 77 -- 60 66
Silty clay loam & clay loam -- 67 67 11 50 10 --


17. Pseudotsuga menziesii (PSME) Series, coarse fragment rock types (percent of stands) 
Soil Characteristics PHMA
h.t.,
SMST
phase,
n=6
PHMA
h.t.,
PHMA
phase,
n=10
VACA
h.t.,
n=2
CARU
h.t.,
n=3
Sedimentary
Calcareous -- 10 -- --
Noncalcareous -- -- -- --
Metamorphic
Argillite -- -- -- 33
Quartzite 33 20 -- 33
Gneiss & schist & phyllite -- 10 -- --
Miscellaneous -- -- -- --
Igneous
Basalt & andesite 50 -- -- --
Dacite, trachyte, & latite -- -- -- --
Rhyolite -- -- -- --
Other volcanics -- -- -- --
Quartz monzonite & granitic -- -- -- --
Granitics (undifferentiated) 17 60 -- --
Miscellaneous -- -- -- --
Mixed (e.g., alluvium, glacial till) -- -- 100 33

18. Pseudotsuga menziesii (PSME) Series, substrate characteristics 
Soil Characteristics PHMA
h.t.,
SMST
phase,
n=6
PHMA
h.t.,
PHMA
phase,
n=10
VACA
h.t.,
n=2
CARU
h.t.,
n=3
EFFECTIVE ROOTING DEPTH (x in cm) 38 54 75 37
EXPOSED ROCK (x in %) <1 <1 <1 1
EXPOSED SOIL (x in %) 1 1 <1 <1
DUFF DEPTH (x in cm) 4.2 3.4 2.0 3.1
GRAVEL CONTENT UPPER PROFILE (x in %) 10 32 5 33
GRAVEL CONTENT LOWER PROFILE (x in %) 17 37 15 50
REACTION UPPER PROFILE (x pH) 6.6 6.5 5.9 6.0
REACTION LOWER PROFILE (x pH) 6.2 6.5 6.1 5.7
TEXTURAL CLASS (upper profile, % occurrence)
Sand and loamy sand -- 20 50 --
Sandy loam 17 20 -- --
Loam -- 10 -- --
Silt loam & silt 50 30 50 33
Silty clay loam & clay loam 33 20 -- 66