Soil diagnosis

Revised 10 June 2002

Cloudiness (using CSIRO dipstick) EC (mS/cm) pH Diagnosis Likely most important problem
0 <0.4 for sands/loams

<0.7 for clays

<5.5 non-sodic, non-saline, acidic Acid
0 <0.4 for sands/loams

<0.7 for clays

5.5-8.5 non-sodic, non-saline No problems
0 <0.4 for sands/loams

<0.7 for clays

>8.5 Unlikely to occur, high pH soils usually sodic  
0 0.4 or more for sands/loams

0.7 or more for clays

<5.5 non-sodic, saline, acidic. Unusual Acid
0 0.4 or more for sands/loams

0.7 or more for clays

5.5-8.5 saline. Saline
0 0.4 or more for sands/loams

0.7 or more for clays

>8.5 saline, alkaline Saline
1 <0.4 for sands/loams

<0.7 for clays

<5.5 sodic, non-saline, acidic Acid
1 <0.4 for sands/loams

<0.7 for clays

5.5-8.5 sodic, non-saline Sodic
1 <0.4 for sands/loams

<0.7 for clays

>8.5 Unlikely - high pH soils usually very sodic  
1 0.4 or more for sands/loams

0.7 or more for clays

<5.5 sodic, saline, acidic Acid
1 0.4 or more for sands/loams

0.7 or more for clays

5.5-8.5 sodic, saline Saline & sodic
1 0.4 or more for sands/loams

0.7 or more for clays

>8.5 sodic, saline, alkaline Saline and sodic
2 <0.4 for sands/loams

<0.7 for clays

<5.5 Unlikely, low pH often prevents sodicity  
2 <0.4 for sands/loams

<0.7 for clays

5.5-8.5 Highly sodic, non-saline Highly sodic
2 <0.4 for sands/loams

<0.7 for clays

>8.5 Highly sodic, non-saline, alkaline Highly sodic
2 0.4 or more for sands/loams

0.7 or more for clays

<5.5 Unlikely, salinity should prevent cloudiness  
2 0.4 or more for sands/loams

0.7 or more for clays

5.5-8.5 Unlikely, salinity should prevent cloudiness  
2 0.4 or more for sands/loams

0.7 or more for clays

>8.5 Unlikely, salinity should prevent cloudiness  
         

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