Mangels are great pig food for the winter months since the store very well and are a high-energy food, good for helping animals keep warm when the temperatures drop.   We harvested a 30 x 50 foot bed two days ago; the crop was just fair, but even that is about 1500 lb. of roots, plus there are all the tops to feed out right away — about 200 lb. of high-iron greens.  Fall is abundant in its provision — we are backed up with farm-produced calories for the animals.  It helps to have some experience in determining how to put these to put these to the best use — for timing, for the right animals, in the right proportions and combinations.  On the farm, there is no such thing as waste.