SOIL - Jamb Biology Past Questions and Answers

Question 1:

• JAMB 2019

Nitrifying bacteria keep the soil fertile by

A. converting ammonium salt to nitrate
B. Converting atmospheric nitrogen to plant nitrogen
C. Converting nitrate to nitrogen
D. Converting nitrate to nitrous oxide
E. Converting atmospheric nitrogen to nitrates

Question 2:

• JAMB 1978

The figure above represents an experiment with two types of soil. The experiment demonstrates

A. Soil attraction of water
B. Soil porosity
C. Soil capilarity
D. Draining capacity of soils
E. Soil permeability

Question 3:

• JAMB 1979

Which of these is not a type of soil?

A. Sand
B. Granite
C. Loam
D. Clay
E. Sandy loam

Question 4:

• JAMB 1979

The farmer cannot check soil erosion effectively by

A. Constructing is ridges of planting across the slope
B. Cultivating cover crops
C. Practising strip farming
D. Clearing the land of vegetation
E. Constructing terraces

Question 5:

• JAMB 1980

if three 30 cm lengths of glass tubes are tightly packed with clay, sand and loamy soils respectively and then stood in a beaker of water for one week, the level of water will be

A. Lowest in the tube with clay
B. The same in all tubes
C. Lowest in the tube with loamy soil
D. Highest in the tube with sandy soil
E. Lowest in the tube with sandy soil