been successful in overcoming some of the problems associated with magnesic soils and some sodic soils. Soil salinity (measured as electrical conductivity, EC) refers to the amount of soluble salts in the soil solution and is commonly measured by electrical conductivity. Nutrients in the soil solution are those most readily available to crops however, when the concentration of nutrient becomes too high, the crop has difficulty extracting water from the soil. Many soils in Australia have naturally moderate to high salinity and require careful management to grow profitable crops. In other areas soil salinity has increased with agricultural activity due to the use of inappropriate quality irrigation water or through hydrological problems associated land clearing or irrigation schemes. Salinity and sodicity can have a significant impact on soil productivity and farm management both in the short and long term hence should be measured and soil management and fertiliser programmes adjusted to take into account their effect.