In the 8th to 13th centuries AD they were followed by an influx of Austronesian sailors from Southeast Asia, who had earlier settled nearby Madagascar. They are the source for the earliest archeological evidence of farming in the islands. Crops from archeological sites in Sima are predominantly rice strains of both "indica" and "japonica" varieties from Southeast Asia, as well as various other Asian crops like mung bean and cotton. Only a minority of the examined crops were African-derived, like finger millet, African sorghum, and cowpea. The Comoros are believed to be the first site of contact and subsequent admixture between African and Asian populations (earlier than Madagascar). Comorians today still display at most 20% Austronesian admixture.