Commercial agriculture can help development in Africa. Work within the RELU programme by Gareth Edwards-Jones at Bangor University has, for example, shown how that part of the Ugandan and Kenyan rural economy that serves European markets is providing a higher level of prosperity for its workers: RELU
This is, of course, controversial and much of the African rural economy is made up of subsistence or semi-agriculture. Charities like Farm Africa seek to make incremental, small-scale improvements in the way in which these economies function with a particular focus on appropriate training: Farm Africa . Accessible technology of this kind is important, but there is a view that it is not a long-term solution.
Here is an interesting piece on how the EU could help the South African economy to develop in the food sector: South Africa
I don't like the jargon term 'beneficiated' though!