Plant production . Watering plants. Why do plants need water?. Water keeps plants upright and stops them wilting. Plants also need water to make food and to carry nutrients through them. Some plants need lots of water and others need very little. Watering methods.
Pupils made this automatic watering system. Water drips very slowly out of the tube onto capillary matting, lining the tray. The plants absorb the water.
Misting systems produce water spraying droplets that are smaller than a human hair.
Millions of these tiny droplets hit the surrounding air, "flash evaporate", and quickly reduce temperatures 25 to 35 degrees.
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