Critical Values for Salts in Irrigation Water for Sorghum and Corn Measurement Electrical Conductivity (EC)
Units
Micromhos per centimeter umhos/cm Millimhos per centimeter mmhos/cm Decisiemens per meter dS/m Parts per million ppm Milligrams per liter mg/l Sodium Adsorption Ration (SAR)
No units
Sorghum
Corn
1,700 1.7 1.7 1,088 1,088
1,100 1.1 1.1 704 704
10
10
Toxic Ions (resulting in foliar damage)
ppm mg/l meq/l
3.0 3.0 0.3
2.0 2.0 0.2
ppm mg/l meq/l
710 710 20
533 533 15
ppm mg/l meq/l
710 710 31
533 533 23
McFarland, et al. 2002. Texas Cooperative Extension
Table 13. Critical Values for Salts in Irrigation Water for Sorghum and Corn.
IRRIGATION MANAGEMENT
Boron Parts per million Milligrams per liter Milliequivalents per liter Chloride Parts per million Milligrams per liter Milliequivalents per liter Sodium Parts per million Milligrams per liter Milliequivalents per liter
103