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Table A: Soil Risk Rating Criteria for Potential Damage to Soil by Fire

This table applies to soils with a surface layer >20 cm thick or soils with a surface layer 10-20 cm thick on a slope <30%. High or moderate risk ratings may indicate the need to consider winter burning, alternate lighting techniques, monitoring of fue

Risk Factor -->

Low

Moderate

High

Medium texture (loams)                           Aspect
 Rock fragments <35%   
 

Organic matter > 2%

      All

 

 
 Organic matter < 2% 

All

 
 Rock fragments 35-60%   
 Organic matter > 2%

NE, N, NW

SE, S, SW

 

 Organic matter < 2% 

NE, N, NW

SE, S, SW

 Rock fragments >60%   
 Organic matter > 2% 

All

 
 Organic matter < 2%  

All

Fine texture (clays)   
 Organic matter > 2%

NE, N, NW

SE, S, SW

 
 Organic matter < 2%

 

NE, N, NW

SE, S, SW

Coarse texture (sands)   
 Organic matter > 2% 

All

 

 Organic matter < 2%  

All

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