Give reasons for the following. Drip irrigation helps in conserving water

cbse
cbse-class-7-science
water-precious-resrc

#1

Give reasons for the following.

  • Put a layer of mulch (leaves, barks, etc.) around the plants and trees.
  • Water the plants before sunrise or after sunset.
  • Drip irrigation helps in conserving water.
  • In spite of huge availability of water on the earth, there is not enough for human consumption.

Answer:

  • A layer of mulch is put around the plants and trees for better absorption of water and to avoid run-off.
  • Plants should be watered before sunrise or after sunset because water evaporates more quickly in sunlight.
  • By drip irrigation there is no loss of water due to seepage, run-off or evaporation. Therefore, it helps in conserving water.
  • There is not enough water for human consumption because most of the water on earth is in seas and oceans which is not potable