2020-03-162020-03-16Elwasila Mukhtar Mohamed Elwasila. (22/10/2019). SKiM - University of Khartoum Presentation at Sudan National Writeshop.https://hdl.handle.net/20.500.11766/10913Knowledge creation The experts exerted efforts to trace the factors behind the problem of contamination, and whether it refers to sources of plants, soil, or other inputs or it is a matter of practice at the different steps of production.PDFCC-BY-NC-SA-4.0PresentationOpen access