Charles Lathrop Pack, president of the American Tree Association, told how Rogers gave him advice in handling an educational campaign in tree planting.'Will Rogers told me,' said Pack, 'that I was on the wrong track in trying to educate people to the value of putting idle land to work growing trees. "Pack," he said, "you go down to Washington and get Congress to pass a law prohibiting tree planting and you'll have everybody doing it in a week.