Soil declamator is a Cardassian term for a piece of technology used to poison an area of land.
During the Cardassian withdrawal from Bajor in 2369, the occupying forces used soil declamators as part of their scorched earth policy. The soil in Rakantha Province was poisoned and they attempted to do the same in Tozhat Province. The Bajoran Resistance was able to stop the declamators from being brought online by placing and detonating a bomb in the barracks they were held in. (DS9 - Prophecy and Change short story: "Face Value")