LAHORE The Punjab Agriculture Department has asked green gram (Moong) growers to complete its sowing till the end of March to achieve good produce. A spokesman for the department said on Friday that certified seed varieties should be used to have maximum yield of the crop in irrigated areas, adding that certified varieties included Nayyab Moong 2006 and Azri Moong . He asked growers to cultivate Chakwal M-6 variety in rain-fed areas and said one bag of potassium sulphate should be used before seed sowing .