Decision Support System for

Soil Health Assessment

Division of Soil Science and Agricultural Chemistry

Indian Agricultural Research Institute

New Delhi

 

 

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Rating chart

 Variable

Value

Rating

  Chemical indicator

     pH

 

     Electrical conductivity (dS m-1)

 

     Soil organic carbon (g kg-1) 

 

     KMnO4 oxidisable carbon   (mg kg-1) 

 

     Available phosphorus (mg kg-1)

 

     Available potassium (mg kg-1)

 

     Available iron (mg kg-1)

 

     Available manganese (mg kg-1)

 

     Available zinc (mg kg-1)

 

     Available copper (mg kg-1)

 

   Physical indicator

     Bulk density (Mg m-3)

 

     Maximum water holding capacity (%)

 

  Biological indicator

     Microbial biomass carbon (mg kg-1)

 

     Dehydrogenase activity (ug TPF g-1 24 h-1)

 

     Potentially mineralizable  nitrogen (mg kg-1)

 

     Carbon mineralization (g CO2-C g-1 h-1 )

 

     Microbial metabolic quotient
     (g CO2-C h-1 kg-1 MBC)

 

  Soil Health Index