Waec Agricultural Science 2018 Past Questions and Answers

Question 16:

• WAEC 2018

The purpose of the part labelled I in the experiment illustrated above is to

A. Allow proper aggregation of soil particles
B. Allow even evaporation of water
C. Prevent water from escaping
D. Distribute water around the soil

Question 17:

• WAEC 2018

A beneficial effect of bush burning on the soil is the

A. Reduction of soil microbial activities
B. Exposure of soil surface to erosion
C. Destruction of weed seeds
D. Improves soil water holding capacity

Question 18:

• WAEC 2018

Which of the following practices does not replenish lost soil nutrients?

A. Crop rotation
B. Fallowing
C. Liming
D. Bush burning

Question 19:

• WAEC 2018

The use of inorganic fertilizer is preferable to organic manure because inorganic fertilizer

A. Improves soil structure
B. Releases nutrients to the soil faster
C. Reduces leaching of soil nutrients
D. Improves soil water holding capacity

Question 20:

• WAEC 2018

Which of the following statement describes an advantage of underground drainage? It

A. Allows for free movement of farm machinery
B. Checks the growth of weeds
C. Improves soil texture
D. Increases organic matter content of soil