Elveden Farms, one of the country's largest single-site lowland farms, has become a LEAF Demonstration Farm.
The 9,100-hectare farm on the Norfolk-Suffolk border, which grows potatoes, onions, carrots and parsnips as well as cereals, joins a network of over 40 farms which showcase the best in sustainable farming.
The farm is LEAF Marque certified, and 30 per cent of the estate is dedicated to conservation. It will now serve as a "living classroom", hosting visits from other farmers as well as community groups, conservation organisations and local schools.
Senior farms manager Andrew Francis said: "Not only does this recognise all our work in combining commercial farming with environmental care, but it will mean that we can reach out to new audiences.
"More than simply telling people about our sustainable farming approach, they can see for themselves how it works in practice."
LEAF chief executive Caroline Drummond said Elveden Farms "represents what LEAF's Integrated Farm Management is all about".
The launch of Elveden Farms as a LEAF Demonstration Farm took place on Wednesday 16 October, attended by the Earl of Iveagh, LEAF chairman Stephen Fell, and Galton Blackiston, owner of Morston Hall, a nearby Michelin-starred restaurant which Elveden supplies.