With son Stuart he pioneered the growing of Gala and Braeburn in the UK, as a result of his ties with French and New Zealand growers, and the "grafting over" of old stock with new varieties. He was also among the first to invest in hail nets.
A noted hockey player, Ivan Clark gained many caps for county and country before becoming manager of the England under-21 team.
Former Home Grown Fruit marketing director Mike Green said: "He was as hard a hockey player as he was a fruit grower, with meticulous attention to detail in the orchard as well as on the pitch."
Ivan Clark leaves behind his widow Jean, sons Ian and Stuart, and daughter Rachel.