Arable growers are expected to push Defra secretary Owen Paterson for more detail about the implementation of new CAP greening rules as he addresses them on the opening day of the 2014 Cereals event.
Thousands of growers are expected to arrive at the event which runs at Chrishall Grange, near Duxford, Cambridegshire on 11/12 June.
The event comes just a day after Mr Paterson revealed his plans for greening for farmers in England.
The minister will address visitors during an arable conference session at 11.30am on Wednesday.
Other topics likely to be high on the agenda at the event include the need for greater cost control against a backdrop of falling crop prices.
The NFU is also expected to highlights its concerns over the loss of active ingredients in agrochemicals.
Since 2001 EU farmers have lost more than half of the 850 actives registered at that time.
From a technical point if view, black grass resistance and controlling broad leaves weeds is likely to be a hot topic.
Working machinery demonstrations will give farmers the opportunity to watch the latest equipment on the market in operation.
See our Cereals 2014 page for comprehensive coverage of the event.