Why does salt water kill plants on farms near the coastlines?

Answer 1

the salt content in the water when mixes with the soil or when it deposits on the foliage it will not allow the plant to get enough breathing gas(co2),thus the plants are killed. only few plants which can tolerate the saline soil can survive in coastal regions.

Answer 2

Saltwater absorbed by plant roots can disrupt their ability to take up nutrients and water, leading to dehydration and nutrient deficiency. Excess salt can also accumulate in plant tissues, causing toxicity that damages cells and slows growth. In severe cases, salt can even leach into the soil and raise its salinity levels to levels that are unsuitable for plant growth.