saline-sodic soil Soil that contains more than 15 per cent exchangeable sodium, a saturation extract with a conductivity of more than 0.4 siemens per metre (4 mmhos/cm) (25°C) and in the saturated soil usually has a pH of 8.5 or less. Either high concentration of salts or high pH, or both, interfere with the growth of most plants.

saline-sodic soil Soil that contains more than 15% exchangeable sodium, a saturation extract with a conductivity of more than 0.4 siemens per metre at 25°C, and in the saturated soil it usually has a pH of 8.5 or less. Either high concentration of salts or high pH, or both, interfere with the growth of most plants.

saline-sodic soil Soil that contains more that 15 per cent exchangeable sodium, a saturation extract with a conductivity of more than 4 mmhos/cm (25°C) and in the saturated soil usually has a pH of 8.5 or less. Either high concentration of salts or high pH, or both, interfere with the growth of most plants.