SOIL - Jamb Biology Past Questions and Answers

Question 56:

• JAMB 2005

which of the following is used to test for the presence of lime in a soil sample?

A. H₂SO_4(aq)
B. NaOH_(aq)
C. HCl_(aq)
D. HNO_3(aq)

Question 57:

• JAMB 2005

The importance of practising crop rotation in agriculture is to

A. Maintain soil fertility
B. Improve the nutritional value of crops
C. Control soil erosion
D. Ensure the growth of crops

Question 58:

• JAMB 2006

The soil type that contain nutrients which are not readily available for plants is

A. Alluvial
B. Clayey
C. Sandy
D. Loamy

Question 59:

• JAMB 2007

The increasing order of the particle size in following soil type is

A. Clay → sand → silt →gravel
B. Silt → sand → clay → gravel
C. Clay → silt → sand → gravel
D. Silt → clay → sand → gravel

Question 60:

• JAMB 2007

A crucible of 5 g m weighed 10 gm after filling with fresh soil. it is then heated in an oven at 100°c for 1 hour. After cooling in a desiccator, the weight was 8 gm. The percentage of water in the soil is

A. 80%
B. 60%
C. 20%
D. 40%