Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 2 - Lab Procedures for LFC and OM (%)

 
 
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 The Norwest lab values for the percent organic matter were obtained using a loss on ignition method (McKeague 1978).

The University of Alberta lab values for the light fraction carbon (LFC) were obtained using a loss on ignition method (University of Alberta 2002). The carbon and nitrogen content of the light fraction material was obtained through a dry combustion process using Carlo Erba instrumentation.

Calculation of the LFC (mg/kg) was then completed as outlined below (Figure 10).

Example of Calculation of Light Fraction Carbon
Used data from B.H. Prairie, Site #586
.
From Lab:
 LF (Wt) g = 0.1776 per 20 grams soil
% Carbon as LF material = 28.918
Therefore:
0.1776 g LF
x
28.918% Carbon as LF  
equals
0.00256792 g LFC
20 grams soil
100
1 g soil
To convert to mg/kg:
0.00256792 g LFC
x
1000 mg
x
1000 g
equals
2567.92 mg LFC
1 g soil
1 g
1 kg
kg soil

Figure 10. Calculation of light fraction carbon (LFC).
 
 
 
 

Other Documents in the Series

 
  Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Abstract
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Introduction
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Results and Discussion
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Conclusions and References
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 1 - Methodologies for Field Tests
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 2 - Lab Procedures for LFC and OM (%) - Current Document
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 3 - Tests for Variability in Methodology
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 4 - Procedure for Active C Test
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 5 - Procedure for Basic EDTA Test
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 6 - Descriptive Statistics for Results of Active C Methods
Evaluation of Two Field Methods to Estimate Soil Organic Matter In Alberta Soils: Appendix 7 - Descriptive Statistics for Results of Basic EDTA Method
 
 
 
 
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This information published to the web on May 4, 2004.
Last Reviewed/Revised on November 20, 2014.