CSEC Biology · January 2009 · Paper 2 · Question 4(c)(iii)
Farmers use fertilisers to increase crop yield.
Suggest ONE beneficial effect of organic fertilisers on soil.
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Practise this questionOther parts of this question
- 4(a)With the aid of a balanced equation, describe the process by which green plants make their food.[6 marks]
- 4(b)(i)Tomato plants infested with a population of caterpillars[4 marks]
- 4(b)(ii)Water plants rooted to the bottom of a pond in which there is a proliferation (sudden large population) of algae[1 mark]
- 4(c)(i)How does the use of fertilisers increase crop yield?[5 marks]
- 4(c)(ii)Some farmers choose to use chemical fertilisers, while others use natural fertilisers. Suggest TWO disadvantages of the use of chemical fertilisers.[1 mark]
More practice: the rest of this paper · more Ecological Studies and Factors questions · all CSEC Biology past papers