Question 9
Soil Fertility and Plant NutritionWhich of the following is a disadvantage of using organic manure on the soil?
- A.Spreading of pests and diseases
- B.Reducing the rate of evaporation from soil surfaces
- C.Improving the nitrogen content of soil
- D.Increasing the humus content of soil
- E.Preventing erosion and leaching
Show the answer and explanation
Answer: A (Spreading of pests and diseases)
Explanation
Organic manure may carry weed seeds, pests and disease organisms; the other options are benefits.