Section 4(4)(b) in West Bengal Land Reforms Act, 1955
(b)he has without any reasonable cause ceased to keep the land or any substantial part thereof under personal cultivation [or has failed to utilise the land consistently with the original purpose of the tenancy or for any purpose directly incidental thereto] [Inserted by West Bengal Act No. 50 of 1981, w.r.e.f. 7.8.1969.] for a period of three consecutive years or more except when such land is under usufructuary mortgage mentioned in section 7;