The board of Nagarjuna Construction has recommended the issue of bonus shares to its shareholders in the ratio of 1:1, i.e. one equity share of Rs 2 for every equity share of Rs 2 held.According to an official release issued to the BSE today, the bonus issue is for all shareholders, including GDR holders. The board has also approved increasing the FII investment limit in the company's equity shares to 49% from the existing 24%. In addition, the board has recommended an equity dividend of 80% for FY06.