Pig manure is very high in Nitrogen andif it comes from a stable yard I assume it will be mixed with either wood shavings, sawdust or straw (pig's bedding materials), otherwise it is a bugger to handle. It is very good for hungry crops though straight pig manure (without the bedding materials) will not add a huge amount of organic matter to your soil.
It is best dug in as soon as you apply it rather than leaving the worms to do the job - this removes any complaints about the aroma that pigsh*t has - though I don't mind it myself, having worked on a pig unit as a teenager- and also ensures maximum nutrient take up by the soil.
I put thousands of gallons of pig slurry on my 5 acres this year - you should see my weeds growing !!!!
