5.1: Describe How Glasshouses and Polyethene Tunnels can be Used to Increase the Yield of Certain Crops

GLASSHOUSES: A Glass Building used for Growing Plants in a Protected and Controlled Environment

POLYETHENE TUNNELS: Elongated Polyethene Covered Frame that Allows Plants to be Grown in an Enclosed Environment Outdoors

GLASSHOUSES	POLYETHENE TUNNELS
Picture showing Plants in a Glasshouse	Picture showing Plants in a Polyethene Tunnel
INCREASING CROP YIELD: Enclosed Environment that Protects Plants from Harmful Weather such as Rain and Thunderstorms Enclosed Environment Allows Carbon Dioxide Levels to be Controlled to Increase Rate of Photosynthesis for Growth (By Burning Paraffin Lamp) Plants are Protected from the Outside so Prevents the Entry of Pests that can Damage Plants or Diseases that can Kill Plants Traps Heat from the Sun so Creates a Warm Climate that is Close to Optimum Temperature of Enzymes in Plants, Increasing Enzyme Activity allowing Rate of Photosynthesis to Increase for Growth