Jamb Agricultural Science Past Questions and Answers

Question 166:

• JAMB 2013

The classification of soils into sand, loam and
clay is largely determine by the percentage of

A. Mineral matter
B. Organic matter
C. Soil water
D. Soil air

Question 167:

• JAMB 2013

An example of igneous rock is

A. Marble
B. Basalt
C. Slate
D. Dolomite.

Question 168:

• JAMB 2013

The most devastating agent of erosion is

A. Wild wind
B. Slope
C. Run-off water
D. Rodents.

Question 169:

• JAMB 2013

A farming practice that encourages the depletion of soil fertility is

A. Planting of cover crops
B. Crop rotation
C. Manual weeding
D. Continuous cropping

Question 170:

• JAMB 2013

The kind of tillage method most suitable for
maize is

A. Zero tillage
B. Minimum tillage
C. Maximum tillage
D. Contour ridges