Soil salinity has emerged a major problem affecting the fertility of soil in India. Almost 2.5% of country’s reporting area is adversely affected by alkali formations. Which of the following statements are correct about saline soils?

1. Salinity is naturally found in arid and semi-arid areas where rate of evaporation is higher than rate of precipitation.

2. Saline soils develop in highly irrigated area as more salt comes up due to capillary action of soil.

3. Salinity can be cured by adding gypsum to the soil.

Select the correct code from the following.