A farmer investigated the effect of adding different masses of fertiliser to a field of wheat.
The Table shows the results.
Table
| Mass of fertiliser added in kg per hectare | Yield of wheat in tonnes per hectare |
|---|---|
| 0 | 4.0 |
| 50 | 5.6 |
| 100 | 6.8 |
| 150 | 7.2 |
| 200 | 7.3 |
Describe the effect of the mass of fertiliser added on the yield of wheat.
Calculate the percentage increase in yield when the mass of fertiliser added increases from 0 to 100 kg per hectare.
An adviser told the farmer to add 150 kg per hectare rather than 200 kg per hectare.
Explain why.
44 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.