To compute a statement of cash flow, it is required 3 sources: comparative balance sheet, income statement and additional information. Does it mean without one of them is not possible to compute the cash flow statement?

If there is no additional information on Land, but there is a change in Land within 2 years, shown on the Balance sheet. Then should we record Land in the statement of Cash Flows? since we do not know if the transaction for Land relates to Cash?