Ferguson is convinced promising players are best served by continuing their footballing education in Manchester.
"Youngsters have a great opportunity to come to Manchester United," he said. "And they ought to take advantage of their potential.
"The history of Manchester United shows that it is a club that always takes a chance on youth, without losing continuity, but that they are made to feel comfortable.
"This is my job.
"To get the maximum performance, but without losing sight of the horizon."