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

GLASSHOUSES: Glass building used to grow Plants in an enclosed environment

POLYETHENE TUNNELS: Polyethene tunnel that allows Plants to be grown in an enclosed and protected environment outdoors

GLASSHOUSES	POLYETHENE TUNNELS
Picture showing a Glasshouse	Picture showing a Polyethene Tunnel
INCREASING CROP YIELD: Enclosed environment protects crops from the effects of weather - wind and rain, and extreme temperatures Enclosed environment protects crops from pests or diseases that can inhibit plant growth Enclosed environment traps heat from the Sun, creating a warm climate close to optimum temperature of plant enzymes, increasing rate of Photosynthesis to promote plant growth GLASSHOUSE: Small scale of glasshouses allows internal conditions to be controlled to increase growth via increasing rate of Photosynthesis: Artificial heating to increase temperature towards optimum for increased enzyme activity in plants for photosynthesis Additional Carbon Dioxide releaed via burning Paraffin lamp for Photosynthesis Regular Watering to enable Photosynthesis POLYETHENE TUNNELS: Large scale of Polyethene tunnels allows for farmers and machines to work inside to increase crop yield Enclosed environment creates a warmer climate close to optimum temperature of plant enzymes than if they were grown outside