Soil Chemistry Large Pictures
Transcript of Soil Chemistry Large Pictures
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Aspen Stands and Implications ofConifer Removal - Nitrogen
The increase in nitrites is likely due to the conversion ofammonia to nitrites in the process of becoming nitrates.
Other differences are statistically insignificant
Based on 16 comparative samples
Soil Nitrogen Chem istry in Aspen Stands
0.10
1.49
0.70
1.29
0.36
0.86
0.550.63
0.110.00
0.20
0.40
0.60
0.80
1.001.20
1.40
1.60
1.80
2.00
NH4-N NO3-N NO2-N
Concentration(ppm,
mg/L)
Conifer removedOutside Stand
Mixed aspen / conifer
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Aspen Stands and Implications of ConiferRemoval Other Soil Chemistry
Soil Chemistry in Aspen Stands
0.02 0.11 0.04
4.70
2.70
3.53
0.00
1.00
2.00
3.00
4.00
5.00
6.00
PO4 K
Concentration
(ppm,
mg/L)
Conifer removed
Outside Stand
Mixed aspen / conifer
Ammonia appears to increase significantly during first year inaspen stands when conifers are removed
Potassium increases are barely significant (a = 0.05)
Other differences are statistically insignificant Based on 16 comparative samples
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The Effect of Slashbusting and SubsequentBurning Other Soil Chemistry
Comparision of Soil Chemistry in Slash Bust Treatments
0.58
14.4
1.77
10.4
0.75
7.8
0
2
4
6
810
12
14
16
18
20
PO4 K
Concentration
(ppm,
mg/L)
Non Slash Bust
Slash Bust
SB Burn
Burning appears to increase ammonia significantly
Burning appears to decrease potassium, though it is barelysignificant (a = 0.043)
Control and slashbusted sites are not statistically different Based on 30 comparative samples
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Soil Chemistry following Wildfireand Harvest - Nitrogen
Comparison of Soil Chemistry by Treatment
(harvest vs non-harvest)post Toolbox Complex Wildfire
0.03
0.13
0.4
0.06
0.22
0.47
0
0.1
0.2
0.3
0.4
0.5
0.6
NH4-N NO3-N NO2-N
Concentration
(ppm)
Harvest
Non Harvest
ANOVA tests indicate that there were no statistically significantdifferences between harvested and non-harvested wildfire sitesin the Toolbox Complex.
The most significant was nitrate (a = 0.055)
Results based on 27 comparable samples On average 24 trees per acre were harvested
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Soil Chemistry following Wildfire andHarvest Other Soil Chemistry
Comparison of Soil Chemistry by Treatment(harvest vs non-harvest)
post Toolbox Complex Wildfire
5.13
7.176.3
7.61
0
1
2
3
4
5
6
7
8
9
10
PO4 K
Concentration(ppm)
Harvest
Non Harvest
ANOVA tests indicate that there were no statistically significantdifferences between harvested and non-harvested wildfire sitesin the Toolbox Complex. Results based on 27 comparable samples
On average 24 trees per acre were harvested
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Comparison of Juniper Treatments onSoil Chemistry - Nitrogen
Nitrates increase significantly compared to all othertreatments when juniper is burned.
All other values are statistically insignificant. Based on 73 comparative samples
Comparison of Soil Nitroten Chemistry in JuniperTreatments
1.11
1.77
0.25
0.97
0.49
0.23
0.94
0.29 0.29
0.82
0.34
0.07
0.0
0.5
1.0
1.5
2.0
2.5
NH4-N NO3-N NO2-N
Concentration(pp
m,
mg/L)
Burn
CutLive
Open
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Comparison of Juniper Treatments on SoilChemistry Other Soil Chemistry
Comparison of Soil Chemistry by Juniper Treatment Options
1.64
6.99
0.60
6.72
1.87
6.12
1.79
6.23
0.0
1.0
2.0
3.0
4.0
5.06.0
7.0
8.0
9.0
PO4 K
Concentration(ppm,mg/L)
Burn
Cut
Live
Open
Phosphates decrease significantly when juniper is cut.
All other values are statistically insignificant. Based on 73 comparative samples
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Role of Woody Debris - Nitrogen
Comparisons of Nitrogen Concentrations in Dense Forests
0 0.00
0.700.75
0.07
0.40 0.420.380.35
0
0.2
0.4
0.6
0.8
1
1.2
NH4-N NO3-N NO2-N
Concentration(ppm,
mg/L)
Under Duff
Exposed
Under DWD
The small number of comparative samples rends all datastatistically insignificantly
It does appear that there may be a strong correlation betweenthatched duff / litter and nutrient cycling.
It does not appear that downed woody debris plays much of a
role until it is in later stages of decomposition. Results are based on 9 comparative samples
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Woody Debris - Other Soil Chemistry
Comparisons of Nitrogen Concentrations in Dense Forests
0.14
2.53
0
1.15
0
1.45
0
0.5
1
1.5
2
2.5
3
3.5
PO4 K
Concentration(ppm,
mg/L)
Under Duff
Exposed
Under DWD
The small number of comparative samples rends all datastatistically insignificantly
It does appear that there may be a strong correlation betweenthatched duff / litter and nutrient cycling.
It does not appear that downed woody debris plays much of a
role until it is in later stages of decomposition. Results are based on 9 comparative samples