What is Reh in terms of land use pattern in India?
1. The total land area on which crops are grown in a region.
2. It is the land in which crops were raised for some period of time but has not been cultivated for the last five years due to certain deficiencies such as alkalinity and salinity in the soils.
3. lands left unused to regain their lost fertility in a natural way.
4. None of the above