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2 marksAcids, Bases and Salts

CSEC Chemistry · May/June 2008 · Paper 2 · Question 7(a)(iii)

Soil is crucial for plant growth, comprising mineral and organic matter, including humus. The optimal soil pH range is 6.0 to 6.8.

State the importance of EACH of the following factors in plant growth: Humus content of the soil

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Other parts of this question

  1. 7(a)(i)State the importance of EACH of the following factors in plant growth: Mineral balance[1 mark]
  2. 7(a)(ii)State the importance of EACH of the following factors in plant growth: pH[1 mark]
  3. 7(b)(i)Briefly describe the test for the presence of ammonium ions in a soil sample.[2 marks]
  4. 7(b)(ii)The Officer finds the soil to be acidic and recommends the addition of lime. Suggest ONE possible reason for the acidic nature of the soil. Explain the effect…[4 marks]
  5. 7(c)The farmer, in addition to adding the recommended lime to the soil, also decides to add an ammonium fertilizer, thinking that it would increase his crop yield.…[5 marks]

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