the aims of the study were (i) to screen the genotypes representing widely diverse geographic areas that are more efficient in K uptake and KIUE for further work which will identify relevant genes and/or markers for use in sweet potato breeding programs, (ii) to determine the extent of genotypic variation in the KIUE of sweet potato, including identifying sweet potato genotypes contrasting in KIUE, and (iii) to determine some plant traits associated with KIUE.