Martin Twyman said he is deeply worried about the future after the Chancellor's Budget last week.
The 84-year-old, who owns HW Twyman Farm near Canterbury, inherited his business from his father, Harry, who started with a small market garden in the 1930s.
The family has been expanding the business since the 1950s to grow wheat, barley, apples and potatoes.
Martin, whose daughter Tracy is among those working the land, said: "I would love my family to continue the business that my father started.
Threat
"And for the next generation and their children.
"The reality is, my family could be left with a huge tax bill which would mean having to sell off lots of land, it would make it unviable.
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