What Calcium may continue to enter the root cells of the plant by the process of?

Calcium may continue to enter the root cells of the plant by the process of active transport, specifically through calcium transporters in the plasma membrane. This process requires energy in the form of ATP to move calcium ions against their concentration gradient, allowing the plant to absorb calcium from the soil. Additionally, calcium can also enter root cells through passive transport mechanisms, such as facilitated diffusion, when concentrations in the soil are higher than in the root cells.