Water Testing Information


Water Data  Critical Levels for Concern 
     
Water pH < 5.0 or > 8.5 
     
Carbonates and Bicarbonates  >120 ppm HCO3
       (meq L-1 and mg L-1or ppm) > 15 ppm CO3-2
     
Total Salinity (Impact on Turfgrass Growth)   
       ECw (dSm-1) Electrical Conductivity >0.75
       TDS (ppm) Total Dissolved Salts (Solids) >500 ppm
     
Ion Toxicity (Impact on Root and Foliar Contact) Roots Foliar
       Na+ (meg L-1 and ppm) >200 ppm >9 meq L-1 >70ppm >3 meq L-1
       Cl- (ppm) >335 ppm >100ppm
       B (ppm) >3 ppm >520ppm
     
Sodium Permeability Hazard (Impact on Soil Structure)   
       Sodium Adsorption Ratio    SARw > 9 meq L-1
       Sodium Adsorption Ratio    Adjusted SARw >10 meq L-1
       Residual Sodium Carbonate > zero
  
Nutrients (ppm and meq L-1)   
       PO4- <0.30 or >2.42 ppm
       P <0.10 or >0.80 ppm
       K   < 5 ppm
       Ca < 20 ppm
       Mg < 10 ppm
       SO4- >180 ppm
       S > 60 ppm
       NO3- < 5 or > 100 ppm
       N < 1.1 or > 22.6 ppm

NOTE: Key basic information should be requested from analytical laboratories when submitting samples for analysis. Because SeaIsle 1 will often be grown in salt-challenged environments, knowledge about the level of salinity stress will be extremely important for making management decisions.


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