Treat it like any other compost - use it for a mulch or dig it into the dirt.

The surfact poo is as good as the rest, just sun-bleached.

I agree, use it all, top and bottom of the pile.
Use mulch, manure or any other type, right on top of the pile. You don't need to dig it in or mix it in. It is most effective on top where it works like the leaves that fall in the forest. On top it blankets the soil, helping it stay cool, slowly decomposes into the soil feeding what grows there and many other benefits.

thanks! I've been worried that it would either burn my plants or just be too rich for the likes of native stuff. I'll start mulching with it immediately! :-)

Don't go overboard with composting for native plants.

The AZ natives evolved with crap soil, and some of them will die if they are over fed.

Horse manure contains High amounts of Salts, unless your pile has been thoroughly leached out I'd be concerned.

We have my own tub grinder to make soils for our container growing at my nursery, I'm always sending samples off the the labs for analysis.. I can tell you I do anything I can to stay Away form horse manure