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1 markPhotosynthesis and ATP Synthesis

CAPE Biology Unit 2 · 2006 · Paper 2 · Question 1(a)

An experiment evaluates the effect of green manure (Azolla) and urea fertilizer regimens on rice field yield and production.

With reference to the graph in Figure 1, determine which fertilizer regimen gives the HIGHEST yield of rice.

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Other parts of this question

  1. 1(b)Calculate the percentage increase in yield when the amount of Azolla is doubled from 7 t to 14 t as the sole fertilizer administered.[1 mark]
  2. 1(c)Determine the difference in rice production, in kg ha⁻¹, between a field treated with urea only at 87 kg ha⁻¹ and one treated with both urea at 43.5 kg ha⁻¹…[1 mark]
  3. 1(d)Name TWO factors, other than nutrient availability from fertilizer, that would affect rice yield.[1 mark]
  4. 1(e)Name ONE type of plant compound that requires the functionally useful element in urea.[1 mark]
  5. 1(f)Suggest TWO reasons why it is better to use plant or animal manure rather than chemical fertilizers alone for fertilizing crops.[1 mark]
  6. 1(g)In the box provided, draw and label the cells in region A between the parallel lines shown in Figure 2.[4 marks]

More practice: the rest of this paper · more Photosynthesis and ATP Synthesis questions · all CAPE Biology Unit 2 past papers