Karnal, Jan. 11 -- Presiding over the closing ceremony of 4th Potato Expo in Karnal, agriculture minister Shyam Singh Rana on Saturday said Haryana leads in potato seed production. The two-day expo was held at Potato Technology Center at Shamgarh village of the district and witnessed enthusiastic participation from progressive farmers, seed producers, scientists, buyers, sellers and public and private sector companies from Haryana and other states. Rana also honoured five farmers for their achievements with Potato Ratna Award....