Effect of tillage on weeds in maize production systems of Malawi

I praise my wife Colletta and children: Beatrice, Leah, Christopher, Maria and Emmanuel who missed my love and fatherly care during my years of study. Special mention to Catherine Strømø, Norway and Marine Pobel, France for their support. My praise will be incomplete if I do not mention Jean-Claude Jauneau and the wife who hosted me in their home before I got accommodation at Reu Benjamin Delessert. God bless them all.