Deputy PM L.K. Advani today called for a Constitutional amendment for a blanket ban on cow slaughter across the nation, asserting that soon there will be enough democratic pressure for such a demand.Advani was speaking at the inauguration of the All-India Conference and Exhibition on cow products-based economy at the IIT.‘‘Article 48 given by the Constitution makers should have been more comprehensive in its scope. Then the situation today would have been substantially different had it fully addressed the issue of cow slaughter,’’ Advani said.‘‘The signature campaign by the RSS after Independence is a great movement that placed the issue of cow slaughter in the centre of public debate till as late as 1979,’’ he added. (Agencies)