Capital gain tax exemption for land acquisition

I am owner of agricultural land within 8km from city limits I) I have sold the property and proceeds have been invested in buying another agricultural land within the stipulated time period of two years to avoid capital gain tax 2) this new property is being acquired by karnataka industrial area developement board 3) whether I have to pay capital gain tax since the property is acquired by kiadb and also the acquisition is within two years from the date of purchase of the land 2) whether any stipulated period of holding of property is must even if it is acquired under LA act to get exemption