Renewal and maintenance of soil fertility - Jamb Biology Past Questions and Answers

Question 1:

• JAMB 2019

A plant which grows on another plant without apparent harm to the host plant is called

A. An epiphyte
B. A saprophyte
C. A parasite
D. A predator
E. A hermaphrodite

Question 2:

• 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 3:

• 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 4:

• JAMB 1982

If a farmer left his land uncultivated for five years before returning to it, he must be practising

A. Modern agriculture
B. Strip cropping
C. Contour ridging
D. Crop rotation
E. The bush fallow system