Scientists predicted how an increase in the mean temperature during the growing season would affect the yield of wheat.
The Table shows their predictions.
Table
| Increase in mean temperature in ∘C^\circ\text{C}∘C | Predicted change in yield of wheat in %\%% |
|---|---|
| 0 | 0 |
| 1 | -6 |
| 2 | -12 |
| 3 | -19 |
Use the Table to estimate the change in yield of wheat for an increase in mean temperature of 1.5 ∘C1.5\ ^\circ\text{C}1.5 ∘C.
A country produces 14 million tonnes of wheat each year.
Calculate the predicted mass of wheat the country would produce each year if the mean temperature increased by 2 ∘C2\ ^\circ\text{C}2 ∘C.
Give your answer in tonnes in standard form.
Warmer temperatures allow some insect pests to spread into countries where they were not found before.
Explain why new pests are a threat to food security.
The price of nitrogen fertiliser has doubled in recent years. Making nitrogen fertiliser uses large amounts of fossil fuels.
Explain how this could affect food security and the sustainability of farming.
127 exam-style questions on OCR GCSE Biology 6.2 Feeding the human race, covering 6.2.1 Biological factors affecting food security, 6.2.2 Agricultural solutions to growing demand, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, 6.2.5 Steps in genetic engineering, 6.2.6 Benefits and risks of gene technology in agriculture, and 6.2.7 Biotechnological solutions to growing demand. Each one has a worked solution and a mark scheme showing where the marks go.