Consider the following statements about the practices followed under “Jhoom farming”:

(A) After obtaining one set of crops the land is left as it is for some years.

(B) The bamboo or weeds which grow on the land are pulled out and burnt.

(C) The ash obtained on burning the weeds etc. is used as fertilizer.

(D) When the land is ready for farming it is deeply ploughed before dropping the seeds.

The correct statement(s) is/are