I am a compost fanatic. A physicist by formal training, I can't stop tinkering. An avid woodworker hobbyist as well. A constant problem for woodworkers is that on occasion we need a high volume source of compressed air, but generally the large compressor sits idle with a tank of moist, corrosive air. I plumbed my compressor to “dump” periodically through a manifold system build into my compost. Instant aeration ... I often hit temps of 180 degrees. And if I have a lot of “green” in the pile it will sustain 180 degrees for a week. Makes for quick compost.
A word of warning .. go lightly with horsemanure and make sure it composts thoroughly and at as high heat as possible. Disgetstive systems of horses are not to efficient ... they pass ALL weed seeds intact. If your compost pile does not heat thoroughly .. at least 160 .... you are going to be sowing weed seeds as well. And .. those weed seeds germinate quickly and grow rapidly in that rich compost host.
Been there .. done that as the saying goes. Tool me 5 years to get weeds somewhat under control in my perennial beds.
A better idea. Still use you horse manure .. but isolate it in its own compost bin using garden weeds you might be pulling or cutting. Kill two birds with one stone. None of my weeds ever go into my main compost .. I compost them separately. Weeds are always a problem, but I have cut production of them down by 75% since I started this.
I need the Urea in the bedding for a source of heat and like I said it was working instantly. That is a great idea about the compressed air injection but my compressor is 130 feet away from the piles. My mother was a original subscriber to Rodale’s organic farming and gardening and we were composting in the early 50s. The stables are just stalls and they are fed mostly grains. The only weed we have encountered is Pig Weed and it pulls up easily. Thanks for the tips...