S. 56 : Income from other sources-Purchase of plots of land at lower price than determined by DVO-Not stock in trade-Provision is applicable-Payment made on cash-Failed to substantiate the cash payment-Credit cannot be given-Estimate by Valuation Officer-Encroachment-DVO is directed to consider the impact of encroachment on land if not already considered in valuation report. [S. 56(2)(vii)(b), 142A]