Research Article
Nitrogen Fertilization Effect on Grain Sorghum (Sorghum bicolor L. Moench) Yield, Yield Components and Witchweed (Striga hermonthica (Del.) Benth) Infestation in Northern Ethiopia
Humera Agricultural Research Center, Ethopia
Dereje Assefa
College of Dryland Agriculture and Natural Research, Mekelle University, Ethopia