Jamb Agricultural Science 2020 Past Questions and Answers

Question 31:

• JAMB 2020

Smut disease of cereals is caused by a

A. Bacterium
B. Fungus
C. Protozoan
D. Nematode

Question 32:

• JAMB 2020

Improvement of yam through breeding is difficult because

A. It possesses no sexual reproductive system
B. Naturally growing types have to be used
C. Its rapid multiplication is very difficult
D. Its genes do not segregate

Question 33:

• JAMB 2020

Leguminous cover crops do not

A. Bind the soil particles together through their roots
B. Increase the nitrogen content of soils
C. Aid in improving the soil organic matter content
D. Reduce the soil microbial population

Question 34:

• JAMB 2020

Maize is a very important crop because apart from serving as a staple, it

A. Is ploughed into the soil to increase fertility
B. Can be processes into corn flakes
C. Forms the base of most livestock feeds
D. Is used for producing germ oil

Question 35:

• JAMB 2020

Andropogon gayanus is commonly called

A. Guinea grass
B. Elephant grass
C. Gamba grass
D. Spear grass