Mahamed Badel Mahamed, Ed Sarobol, Tilahun Hordofa, Sudsaisin Kaewrueng and Jindarath Verawudh 2011. Effects of Soil Moisture Depletion at Different Growth Stages on Yield and Water Use Efficiency of Bread Wheat Grown in Semi Arid Conditions in Ethiopia. Agriculture and Natural Resources. 45, 2 (Apr. 2011), 201–208.