Chandigarh, Feb 21 (PTI) Farm scientist M S Swaminathan today put emphasis on accelerated efforts to improve productivity, profitability and sustainability of small farmers in order to fulfil the requirements of the proposed National Food Security Bill. He was addressing the tenth convocation of National Dairy Research Institute (NDRI) in Karnal today. Swaminathan stressed on providing adequate feed and fodder to over a billion farm animals as the country requires more than 200 million tonnes of milk to meet the nutritional security of growing population by 2030. He also said that their is a need to develop a strategic plan for rural research as more than 70 per cent of population is still confined to the rural areas. Swaminathan said mixed farming approach provides more security to the livelihood of small farmers as different components help in preventing a total loss even if there is a calamity.