Edible oil imports rose 8 per cent year-on-year in March to 11.35 lakh tonnes, industry body SEA on Friday said and demanded that the duty difference between crude palm oil and refined palm oil should be increased to protect domestic refineries. The Solvent Extractors' Association of India (SEA) in a statement said edible oil imports rose to 11,35,600 tonnes in March from 10,51,698 tonnes in the year-ago period.