Sawyer Rob
Super Member
If the horse manure is not over a year old it will contain bedding (shavings, sawdust) that hasn't composted. In the garden, the bedding will soak up the available nitrogen as it breaks down. The trouble with that is that it will starve your vegetables of nitrogen.
That is true, the carbon (wood) binds up the N, BUT! Once the carbon is composted out, it RELEASES the N, so you get it back...
BTW, I'd take all the horse poop I could get! Personally I get all the turkey poop I want, and most all the cow poop I want too, but I'd not turn down available horse poop!
SR