10 minutes maximum! Can you do it in 5?
Q 1-5: The picture shows strawberries being grown in a polythene tunnel:
1. Strawberries can be grown in open ground without the use of polythene tunnels. Why might a farmer build polythene tunnels in which to grow the strawberries?
2. Which of the following combination of conditions will improve the yield?
|3. When the plant photosynthesises which molecule produced is used to make the cellulose of plant cell walls?
|4. The farmer can use fertilizers to improve yields. Which essential element needed for growth is in fertilizers?
5+6: A farmer carried out a trial to see which fertilizer was most effective at increasing the yield of maize. She divided the field into 3, leaving one part as a control, applying inorganic fertilizer to another part and applying organic fertilizer to the third part.
The result of the trial is shown in the graph:
|5. By how much did organic fertilizers increase the yield of the maize compared to the control?
|6. What would the farmer have done to the control crop?
|7. Which of the following is not an organic fertilizer?
|8. Which of the following is not a feature of organic fertilizers?
|9+10: Pests can greatly reduce the yield of a crop. The strawberry weevil can cause yield losses of more than 50%.
9. What may be the advantage of spraying the crop with an insecticide?
|10. An advantage of growing crops within a greenhouse or polythene tunnel is that biological control methods can be used to reduce pest numbers.
Which of the following is NOT a feature of a successful biological control organism?