Waec Agricultural Science 2006 Past Questions and Answers

Question 11:

• WAEC 2006

The largest kola-nut producing vegetation zone in West Africa is the

A. Sahel savanna
B. Sudan savanna
C. Derived savanna
D. Mangrove swamp

Question 12:

• WAEC 2006

Which of the following processes does not lead to the physical disintegration of rocks? The

A. Heating and cooling of rock surfaces
B. Expansion and contarction of rock minerals
C. Formation of cracks and crevices
D. Rapid cooling and solidification of rocks

Question 13:

• WAEC 2006

The two main elements of climate which affect soil formation are

A. Rainfall and temperature
B. Rainfall and air
C. Temperature and light
D. Wind and relative hunidity

Question 14:

• WAEC 2006

Soil erosion caused by water can be controlled by

A. Overgrazing and bush burning
B. Ploughing and harrowing
C. Land clearing and stumping
D. Afforestation and erection of bunds

Question 15:

• WAEC 2006

Although clayey soils are rich in nutrients, they are not good for most agricultural crop production because they

A. Do not release their nutrients
B. Are too compact and poorly aerated
C. Lose their nutrients too readily after rains
D. Contain too much iron,aluminium and boron