Soil tillage, residue management and site interactions affecting nitrogen use efficiency in maize and cotton in the Sudan Savanna of Africa

Nitrogen (N) fertilizers applied to agricultural lands are often lost due to improper management practices. It is important to manage applied N fertilizers efficiently in order to promote sustainable crop production. In a two year (2013–2014) on-farm trial in the Sudan savanna of Benin (Dassari village) and Burkina-Faso (Dano village), we assessed the single and interactive effects of tillage and crop residue management on nitrogen uptake (NU)...