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Question
Salt is applied to tennis lawns to kill weeds. How does salting tennis lawns help in killing of weeds without affecting the grass?
Solution
Applying salt may not only lead to the death of weeds but also the grass. Applying salt to plants leads to osmosis and water comes out of the cell. It is a misconception that applying salt may lead to the death of only weed plants.
Plant cells losing excess water may lead to the death and later death of the plant. Some gardeners practised applying salt but it had drawbacks. The only solution to protect useful plants is to sprinkle weeds only, but it is not a full-proof method to avoid weeds without affecting useful plants.
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