Notes:

(a) These data serve only as a guidline to relative tolerance among crops. Absolute tolerances vary depending upon climate, soil conditions, and cultural practices.
(b) Chloride concentrations in saturated-soil extracts sample in rootzone. To convert CL- concentrations to ppm, multiply threshold values by 35. To convert % yield decrease to % per ppm, divide slope values by 35.
(c) Less tolerant during emergence and seedling stage.
(d) Values for paddy rice refer to the Cl- concentration in the soil water during flooded growing conditions.