Question

HYDROPONICS : Hydroponics is a way of growing plants without soil. The plants grow in an insoluble

porous material, e.g. sand, which is regularly soaked with water.

Water is pumped though the system four to six times a day depending on plant type. Once the pumping

stops, any excess water drains away and collects in the water storage tank.

QUESTION :

Studies have shown that plants grown hydroponically use less water than plants grown in soil.

A key reason for this lies in the design of hydroponics systems.

What feature of the hydroponics system saves water compared to plants grown in soil?

E. The porous material holds the water in the growing trough.

F. Because water is not present all the time there is less evaporation.

G . Plants watered at regular intervals absorb less water.

H. Water flow over the roots cools the plant, so the plant uses less water.​

Answer 1

Answer:

Option F

because water is not present all the time there is less evaporation.