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Characteristics of Mazama AshSoils
S o il C ha racter is t ics o f M az am a Ash S oi ls in the R e
U p p e r C h e w a u c a n W a te rs h e d , 2 0 0 8
44.8
1.9
8 .56.21
9 .2
0
10
20
30
40
50
S oil D epth D uff D epth Rhiz om e D epth M ois ture (% ) S oil Tem p C
depths(cm)
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The scenario occurring duringthe destruction of soil structure
by fire is: Soil structure collapses
Reduces soil porosity
Soil surface compacted by raindrops
Soil pores become partially or totallysealed
Impenetrable soil surface reducesinfiltration rates, producing rapidrunoff and hill slope erosion
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Stand Density
Predominantly Lodgepole Pine
Western Mountain Pine Beetles Effect
Basal area reduced from 300 to around100
Living trees reduced from 400 to 120,leaving around 280 standing snags per
acre
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Soil Heating Process
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Research Procedure
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Water Holding CapacityResults
C o m p a r is o n o f W a te r H o ld in g C a p a c i ty o f M a
B u r n e d fo r 5 m in u te s a t V a r io u s T e m p e
5 7 . 6 5 8 . 05 1 . 3
4 6 . 0
0 . 0 0
1 0 . 0 0
2 0 . 0 0
3 0 . 0 0
4 0 . 0 0
5 0 . 0 0
6 0 . 0 0
7 0 . 0 0
2 0 C Te s t in g 1 0 0 C Te s t in g 2 0 0 C Te s t in g 4 0 0 C Te s t in g
waterholdingcapacity(%)
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Percolation Rate Results
C o m p a r is o n o f P e rc o la t io n R a te s in M a z a m a A
fo r 5 m in u te s a t In c r e a s in g T e m p e r a tu
0 . 7 0 .7
3 . 0
3 .6
0 . 0 0
0 . 5 0
1 . 0 0
1 . 5 0
2 . 0 0
2 . 5 0
3 . 0 0
3 . 5 0
4 . 0 0
2 0 C Te s t in g 1 0 0 C Te s t in g 2 0 0 C Te s t in g 4 0 0 C Te s t in g
percolationratio(g/s)
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Turbidity Results
100 CTurbidity: 200
Cloudy
200 CTurbidity: 50
Colored
400 CTurbidity: 10
Clear
Samples added to 500ml of water, agitated for 5minutes and sat for 1 minute before photographs
were taken.
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Bacteria Results
C om par ison o f B ac ter ia l C oun ts a t Va rious D epths
Ash S oi ls Fo llow ing B urn ing for 5 minutes a t V
Tem pera tu res , 2008
2400
8 0 0
2400 2400
18001600
2400 2400 2400 2400
0
500010000
15000
20000
25000
30000
20 C 100 C 200 C 400 C
meanba
cterialcount
Surfac
2 .5cm
5c m
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Effects of Heat on SoilStructure
20 C
600 C200 C
100 C
800 C
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Conclusion
Soil can be significantly changes attemperatures of 200 C
Hydrocarbons in pine needles bind soil
particles together, increasing plasticityof soils.
Increased erosion, decreased nutrients andwater storage
Water repellent layers become amajor soil feature at 400 C
Soil Biota is killed within the first inch