Consider the statements regarding salinization which is a one of the major problem, reducing Indian agricultural productivity.
1. In drier regions, capillary action can lead to salt accumulation on the surface of the land which is brought from the deep saline ground water tables.
2. Irrigation can result in salinization of soils.
3. It can occur both naturally as well as artificially.
Choose the correct statements from the codes given below.
1, 2 only.
1, 3 only.
2, 3only.
All the above.
Explanation:
In drier regions wherever salt accumulation has occurred because of capillary action, thesalts are brought from the shallow depth where the saline ground water table exists.Salination can be caused by natural processes such as mineral weathering or by the gradualwithdrawal of an ocean. It can also come about though artificial processes such as irrigation.Salinity from irrigation can occur over time wherever irrigation is used; since almost allwater (even natural rainfall) contains some dissolved salts. When the plants use the water,the salts are left behind in the soil and eventually begin to accumulate.
In drier regions wherever salt accumulation has occurred because of capillary action, thesalts are brought from the shallow depth where the saline ground water table exists.Salination can be caused by natural processes such as mineral weathering or by the gradualwithdrawal of an ocean. It can also come about though artificial processes such as irrigation.Salinity from irrigation can occur over time wherever irrigation is used; since almost allwater (even natural rainfall) contains some dissolved salts. When the plants use the water,the salts are left behind in the soil and eventually begin to accumulate.