Depreciation on land is not applicable, therefore no change in the value of the land as on March 2020 , however if As or Ind As permits for revaluation of land then , then you have to show current or revalued fingers in balance sheet of 2020 , by creating revaluation reserve , because value of land as always increasing.
Also you have to Capitalize all the expenses to incurred during the period 2006 to 2020 to upkeep the land. So value of land may increase due to revaluation and Capitalization of the expenses. otherwise value of land remain same, you have to refer AS or IndAs whichever is applicable in this Case.