Question 50
Agriculture, Fishing and LumberingSome plant diseases are checked during the fallow periods in the bush fallowing system of agriculture because the
- A.humus accumulates over time
- B.fires used in clearing the bush destroy them
- C.plant species resist the diseases
- D.disease organisms lose their hosts and die
- E.land is heavily fragmented.
Show the answer and explanation
Answer: D (disease organisms lose their hosts and die)
Explanation
When the crop is not grown for some years, the pests and diseases that live on it have nothing to feed on and die out.