Which of the following statements is correct about the types of land mentioned in the Ain?

All of the above.

Different types of land mentioned in Ain- 

Polaj, land which is annually cultivated for each crop in succession and is never allowed to lie fallow.

Parauti, land left out of cultivation for a time that it may recover its strength.

Chachar, land that has lain fallow for three or four years.

Banjar, land that is left uncultivated for five years and more.