I'm envious of you.  I was not the kid who "grew up" in the tractor but I was very helpful and cheap labor for my father by the time I was 15.  By the time I got to college I wasn't sure if there would be a spot for me on the farm (and for a few years there wasn't) but by the time I was 25 I had my own acres along with Dad's.   Now, dad has slowed down but still does a lot of my planting and harvesting.  Things will be very different when he isn't able to help but I find myself telling people that I hope I never retire.  I hope I can slow down but not quit!  Good Job!