Which mineral is necessary for a plant's water and ion balance?

Name: Which mineral is necessary for a plant's water and ion balance?
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Potassium plays a key role in regulating a plant's water balance by controlling the opening and closing of stomata, which are tiny pores on the leaves that allow water vapor and ions to move in and out of the plant. Potassium also helps to maintain a plant's ion balance by regulating the uptake of important nutrients like nitrogen and phosphorus.

Which Mineral Is Necessary for a Plant's Water and Ion