Edexcel IGCSE Biology 5.3 fertilisers and crop yield
Practise fertiliser questions by linking mineral ions to plant growth, plotting dry-mass data and explaining why extra fertiliser stops helping.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- Link nitrate or magnesium in fertilisers to proteins, chlorophyll, photosynthesis and yield.
- Interpret seedling dry-mass graphs and explain why dry mass gives a fair comparison.
- Explain why extra fertiliser may not raise yield further, including washing away or wilting.
5.3 Fertilisers and crop yield question 1
[Maximum number: 1]
Using the recommended amount of fertiliser on a crop increases crop yield. Some farmers think that adding extra fertiliser will give an even greater crop yield.
Give a reason why adding extra fertiliser does not result in an even greater crop yield.
An answer that makes reference to one of the following points:
- excess not absorbed / some washed away / eq
- water lost by osmosis / causes plants to wilt / less water taken in / eq
- crop already receiving sufficient nutrients / minerals / fertiliser / eq
Accept cannot take up any more nutrients / minerals / fertiliser / eq
Accept is already taking up maximum nutrients / minerals / fertiliser / eq
All question bank results loaded