use of straight cow manure as soil

I've seen a few YouTube videos (notably from theVedicWay) asserting "the perfect soil" is cow manure, and once dried, it is the ideal most fruitful and so forth.
So today my neighbor sees me gardening and tells me his friends that work at a dairy can get me all the manure I need.
Anyone have any experience with using dried, relatively fresh manure as soil?
I think I'll be doing one raised bed of it just to see what happens, and compost most of the rest. My soil has a layer of mulch from at least a decade of weed growth and a certain but unknown amount of salinity on top of heavily silted and compacted soil with more rocks than I know what to do with and I want to get my soil in shape.

Hi Tom, I have seen the Vedic video and the crop growing results looked very encouraging, keep in touch and let us/me know how you get on, cheers Dave

I'm watching another one at the moment from the GrowYourGreens guy, there's more concerns than just manure.
The Hare Krishna ones recommend getting your own cows and feeding them all grass and whatnot.
If I'm getting dairy manure, I could be getting manure with hormones, various herbicides, etc.
I'm still going to do it, and I'll try to find out what they use at the dairy. A lot of them are at least partially grass fed, not really factory farms.