Ahmedabad, Dec. 7 -- Union home minister and minister of cooperation Amit Shah on Saturday said the Centre will use the cooperative model pioneered in Banaskantha to build a national circular dairy economy that will raise farmers' incomes by at least 20% in next five years. He was speaking in Vav-Tharad in Gujarat after inaugurating Banas Dairy's new Bio-CNG and fertiliser plant and laying the foundation stone for a 150-tonne milk powder facility. Shah said the tradition started by Galbabhai Nanjibhai Patel, who founded Banas Dairy in Banaskantha, had grown into a Rs.24,000-crore enterprise built by women and farmers of the district. "Our cooperative dairies have achieved tremendous success in procuring milk from farmers and returning the i...