Decompose

You cause nonliving organic matter or the corpse of a creature to undergo significant decomposition in a short period of time. Within one minute of casting, the target begins to grow fungus and flora relative to the climate and geography of the target's location. The organic matter also begins releasing the stench of decay and death so scavengers may more easily locate it to hasten along the process even further.

This rapid decomposition does not interfere with or prevent using the Speak with Dead spell or 5th level and higher resurrection spells. The cantrip simply accelerates the rate at which decay sets in such that the land can reclaim the corpse or organic material much sooner: days and weeks instead of months and years.