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3 marksCrop Management

CSEC Agricultural Science · 2010 (second paper) · Paper 2 · Question 8(a)

Weeds are unwanted plants that cause adverse effects on crop production if uncontrolled.

List THREE ways by which weeds can affect the growth and yield of crops.

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Other parts of this question

  1. 8(b)(i)Farmer Dillon cultivates maize on a two-hectare plot and controls weed growth with a locally available weedicide. Categorize weedicide use as either manual,…[1 mark]
  2. 8(b)(ii)After continued use of the weedicide, broad leaf weeds disappeared but other weeds persisted. Give TWO likely reasons for this observation.[2 marks]
  3. 8(b)(iii)Describe TWO cultural practices Farmer Dillon can use on his farm to control weed growth.[4 marks]
  4. 8(b)(iv)Identify TWO methods of mechanical weed control.[2 marks]

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