>>213641109
I looked it up, and it seems like there is a difference of opinion among scholars in this matter. Some say that the earth essentially purifies all, and so pig feces that has been processed into manure becomes pure. Therefore, using pork manure is not an issue But others say pigs and all of its byproducts are unclean to the highest degree, and as such the use of pork manure might compromise the purity of the food grown on it. In the end, Allah knows best.