Reading the following link about tree stump removal or killing a tree, suggests using rock salt. Won't the salt affect the ground around the tree stump after decay or during decay? Will the salt affect other plants growing in the area? https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-stump-removal.htm
Yes, it is possible for the salt to effect, damage or kill the grass around the stump.
These effects may be corrected after the stump has been removed.