The scientist and entrepreneur is a world authority on calcium transport in plants, which has been used by in the development of sustainable agriculture inputs.
He is an experienced agronomist, working on crops in Europe, Africa, Asia and the Americas.
He is the inventor of over 30 granted patents.
Marks will be discussing AXM Chemistry used in Calmax Ultra and how it can improve fruit production, quality and shelf life.
Omex has arranged a talk at The Royal Hotel, Ross-on-Wye on 3 March at 7.30am.