why can’t we use salt water for irrigation?
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when you water plants, the water gets pulled up through littles holes in the roots and then has to enter the plant’s cells. osmosis tells us that water wants to go from a less salty place to a more salty place. fresh water is less salty than the insides of plant cells, so it will give water to the cells and plump them up. salt water is saltier than the plant cells, so it goes backwards: the cells give up their water and shrivel up.
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