SOIL - Jamb Biology Past Questions and Answers

Question 66:

• JAMB 2014

Which of the following is a nitrogen-fixing blue-green algae of soil?

A. Rhizobium
B. Nitrosomonas
C. Clostridium
D. Anabaena

Question 67:

• JAMB 2014

The soil with highest water-retaining capacity is

A. Clayey Soil
B. Stoney soil
C. Sandy soil
D. Loamy Soil

Question 68:

• JAMB 2016

In the nitrogen cycle, the nitrates in the soil are converted to atmospheric nitrogen by

A. Puterfying bacteria
B. Nitrogen-fixing bacteria
C. Nitrifying bacteria
D. Denitrifying bacteria

Question 69:

• JAMB 2017

Nitrogen is released into the atmosphere when ________

A. Plants absorbs mineral salt
B. Sugar is completely broken down
C. Through plant uptake
D. When lightning strike

Question 70:

• JAMB 2018

Which of the following statements is true about sandy soil?

A. Has limited air space
B. Is light and easy to dig
C. Drains slowly
D. Is heavy and poorly aerated