Question 8
FA farmer investigates the effect of adding fertiliser on the yield of wheat.
The Figure shows the results.
Figure
a.[1]
Give the yield of wheat when 100 kg of fertiliser per hectare is added.
b.[2]
Calculate the percentage increase in yield when the mass of fertiliser added increases from 0 to 150 kg per hectare.
c.[2]
Explain why adding fertiliser increases the yield of wheat.
d.[2]
The farmer says:
'I will add 250 kg of fertiliser per hectare to get the highest yield.'
Use the Figure to explain why the farmer is wrong.
6.2 Feeding the human race Questions
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.