Impact of irrigation and nitrogen management on crop performance, yield and economics of sorghum (Sorghum bicolor) inKandahar region of Afghanistan oleh HIKMATULLAH YON, C M PARIHAR, NORULHAQ MOHAMMADI, S L JAT, B R MEENA, KIRANMOY PATRA, H S NAYAK, KAMLESH KUMAR, M D PARIHAR, MOHAMMAD YAR MAKAKZAI, B N MANDAL, RAJ SINGH