Jamb Agricultural Science 2021 Past Questions and Answers

Question 11:

• JAMB 2021

The horizon of a soil profile which encourages the greatest level of microbial activity is

A. A - horizon
B. B - horizon
C. C - horizon
D. D - horizon

Question 12:

• JAMB 2021

The easiest method of determining soil texture in the field is by

A. Moulding
B. Sieving
C. Sedimenting
D. Feeling

Question 13:

• JAMB 2021

The type of soil with a particle size of 0.02 to 0.002mm is

A. Clay
B. Slit
C. Fine sand
D. Coarse sand

Question 14:

• JAMB 2021

If urea fertilizer contains 46% nitrogen, calculate the amount of nitrogen in 25kg bag of fertilizer?

A. 11.5kg
B. 13.5kg
C. 21.5kg
D. 26.5kg

Question 15:

• JAMB 2021

Fertile soil is one which

A. Which easily drained
B. Is well aerated
C. Can produce a good harvest of cowpea
D. Contain all essential plant nutrients in suitable proportion