Crop Tolerances

Salt Tolerance

Various commodities have varying salt tolerances; this table helps to provide a general overview of crop sensitivity.

For full text, please visit the USDA-NRCS North Carolina Irrigation Guide. Further information can be found starting on page 33.

salt tolerance levels of various plants
NC Irrigation Guide

Critical Salt Levels for Peanuts, Cotton, Corn, and Grain Sorghum

Texas A&M Irrigation Water Quality

These values indicate the maximum salt levels in irrigation water that can be used without negatively affecting crop yield. These values are just estimates. The actual response of crops may vary based on factors such as soil type, rainfall, irrigation frequency, and weather.

Table 1 dispalying critical values for salts in major crops

Table 1 from Texas A&M Irrigation Water Quality AgriLIFE Extension

Use of Tolerant Plants, USDA (2018)

General tolerance of crops (USDA 2018)

Additional Resources
Salt Affected Soils Salinity and Irrigation Management Salinity Homepage
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Sarah Richardson