Elaeis guineensis but since 2007, Indonesia has been the world's largest producer, supplying approximately 50% of world palm oil volume. Worldwide palm oil production for season 2011/2012 was 50.3 million metric tons, increasing to 52.3 million tons for 2012/13. In 2010/2011, total production of palm kernels was 12.6 million tonnes. The Urhobo people of Nigeria use the extract to make Amiedi soup. Key scientific journals publishing on oil palms and related topics include: The social and environmental impacts of oil palm cultivation is a highly controversial topic. Oil palm is a valuable economic crop and provides a major source of employment. It
Elaeis guineensis and forms of "Elaeis guineensis" have been selected that have different characteristics. These include: Before the Second World War, selection work had started in the "Deli dura" population in Malaya. Pollen was imported from Africa, and DxT and DxP crosses were made. Segregation of fruit forms in crosses made in the 1950s was often incorrect. In the absence of a good marker gene, there was no way of knowing whether control of pollination was adequate. After the work of Beirnaert and Vanderweyen (1941), it became feasible to monitor the efficacy of controlled pollination. From 1963 until the introduction of the