The event, on 2 December at will be held at PGRO Thornhaugh, near Peterborough.
Smith is due to speak on the role of the National Farmers Union (NFU) in UK Farming and his work after his recent appointment.
Norweigen turf grower of Østfold Gress Johnny Trandem will speak about the recently formed European Turfgrass Producers group and Paul Hammett, also of the NFU, will update the conference on the water abstraction licencing review currently being undertaken by DEFRA and the Environment Agency.
Jonathan Tame from BALI will speak about the technical issues facing his members when dealing with turf in the landscape. The event will be rounded off by Stephen Edwards from Inturf who will be giving a presentation on health and safety issues.
TGA chief executive Tim Mudge said: "We are so pleased that, once again, we have been able to attract such a high calibre of speakers at our annual event. It is testament to the growing importance of our sector, and how much we have raised our profile over the past 10 years, that we consistently deliver such a wide range of relevant topics delivered by experts within their fields."
There will also be an update to members from the TGA on recent activities at the conference and a conference dinner the night before at the Haycock Hotel at Wansford.