Waec Agricultural Science 2012 Past Questions and Answers

Question 11:

• WAEC 2012

Which of the following factors should be considered in selecting cover crops? The cover crops must I. be easy to propagate II. compete with the main crops III. have roots capable of binding soils IV. be slow growing

A. I and II only
B. II and III only
C. I and III only
D. III and IV only

Question 12:

• WAEC 2012

Which of the following terms is not associated with surface irrigation?

A. Tile
B. Basin
C. Dyke
D. Furrow

Question 13:

• WAEC 2012

Loss of nitrogen from the soil through the removal of oxygen from nitrates by bacteria is known as

A. Ammonification
B. Dehydration
C. Dentrification
D. Nitrification

Question 14:

• WAEC 2012

Which of the following statement are advantages of mulching? It I. controls weeds II. conserves soil moisture III. increases soil temperature IV. reduces soil pH

A. I and II only
B. I and III only
C. II and IV only
D. III and IV only

Question 15:

• WAEC 2012

Determine the weight of potassium in a 50 kg NPK (20:20:10) bag of fertilizer.

A. 5.0 kg
B. 7.0 kg
C. 10.0 kg
D. 20.0 kg