Effect of pretreatments and drying on nutrient content of orange fleshed sweet potato tubers and cowpea leaves used in Maswa district, Tanzania. Author/Editor(s): Nicanuru, Christerbel.Date of publication: 2016RUFORUM Theses and Dissertations Read more about Effect of pretreatments and drying on nutrient content of orange fleshed sweet potato tubers and cowpea leaves used in Maswa district, Tanzania.