What if any prohibitions are there on the intentional use of excrement from unclean animals as fertilizer for crops? Must it be buried, for example?
Does the same apply to the intentional use of unclean animal remains as fertilizer? For example, if restaurant refuse that likely contains non-kosher animal remains is composted and used to fertilize soil, into which seeds were planted? Or if the carcass of an animal that died of itself was similarly used?