Section 2(1)(b) in The Bengal Agricultural Income-Tax Act, 1944
(b)any income derived from such land by-(i)agriculture, or(ii)the performance by a cultivator or receiver of rent-in-kind of any process ordinarily employed by a cultivator or receiver of rent-in-kind to render the produce raised or received by him fit to be taken to market, or(iii)the sale by a cultivator or receiver of rent-in-kind of the produce raised or received by him, in respect of which no process has been performed other than a process of the nature described in item (ii);