Consider the following statements about well and tube well irrigation: 1. It is not possible in areas of brackish groundwater 2. Excessive irrigation by well leads to the problem of reh. Which of the statements given above is/are correct?

The well and tube well irrigation is the simplest and the cheapest source of irrigation.

Excessive irrigation by canal leads to the problem of reh, which is not the case with well irrigation. 

Well and tube well irrigation is not possible in areas of brackish groundwater.

Reh - a salty surface crust found on the soil in parts of India.

Saline and alkaline soils are found in Andhra Pradesh, Telangana and Karnataka. In the drier parts of Bihar, Uttar Pradesh, Haryana, Punjab, Rajasthan and Maharashtra, there are salt-impregnated or alkaline soils occupying large part of area. These soils are liable to saline and alkaline efflorescences, and are known by different names, such as reh, kallar, usar, thur, rakar, karl and chopan. In canal irrigated areas and in areas of high sub-soil water table, the injurious salts are transferred from below to the top soil by the capillary action, as a result of evaporation in dry season. The accumulation of these salts makes the soil infertile and renders it unfit for agriculture.