Glasshouses and polyethene tunnels/polytunnels help to create the ideal conditions for plants, thus increasing the yield (how much grows) of a crop. Some ways they create the perfect conditions are...
- The plants are enclosed, meaning they are at no/a significantly lower rick of pests and diseases.
- Artificial light can be supplied which will increase the time per day a plant is photosynthesizing
- The suns heat can be trapped (particularly in glasshouses). This keeps the plant warm. In winter it can stop the plants from being damaged by frost etc
- As it is an enclosed space, farmers can increase the level of carbon dioxide in the glasshouse/polyethene tunnel. They can do this by burning a paraffin lamp etc (combustion fossil fuels gives carbon dioxide). This further increases the amount/rate of photosynthesis the plant endures.
All of the above increase the yield of a plant.
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ReplyDeleteone more thing,it was clear and understandable but try adding pictures which would give a even better picture.
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