Jamb Agricultural Science 2020 Past Questions and Answers

Question 76:

• JAMB 2020

The most common soil mineral found in all crystalline rocks and a main constituent of granite and sandstone is

A. Biotite
B. Quartz
C. Mica
D. Granite

Question 77:

• JAMB 2020

A soil with pH2 can be described as

A. Moderately acidic
B. Moderately alkaline
C. Highly acidic
D. Highly alkaline

Question 78:

• JAMB 2020

Which of the following will be responsible for the poor yield of fertile soil in a high rainfall area?

A. Leaching of soil nutrients
B. Very low pH value of land
C. Lack of soil microbes
D. High alkalinity of soil

Question 79:

• JAMB 2020

Crop rotation has the following effects on the soil except

A. Maintenance of soil fertility
B. Reducing concentration of soil pests
C. Improving soil structure
D. Predisposing soil to leaching

Question 80:

• JAMB 2020

Which of the following is an example of igneous rock?

A. Gneiss
B. Limestone
C. Standstone
D. Granite