Getahun Dereje, Tesfa Bogale, Cherukuri V Raghavaiah, Bogale Walelegn, and Arvind B Chavhan, “On- farm productivity response of rainfed grain Sorghum (Sorghum bicolor L.) to integrated nutrient supply system in Assosa Zone, Western Ethiopia, East Africa”, ijlsci, vol. 4, no. 2, pp. 169–175, Jul. 2016.