Waec Agricultural Science 2009 Past Questions and Answers

Question 11:

• WAEC 2009

Chemical weathering is fastest in

A. Cool weather
B. Hot weather
C. High altitudes
D. Low altitudes

Question 12:

• WAEC 2009

It is not advisable to apply fresh farmyard manure because

A. Its heat of decomposition may cause scorching of plants
B. Some microorganisms in the manure may die
C. The manure may increase soil acidity
D. The manure may increase soil alkalinity

Question 13:

• WAEC 2009

Magnesium deficiency in crops can be corrected by the application of

A. Dolomite
B. Limestone
C. Quicklime
D. Urea

Question 14:

• WAEC 2009

The atmosphere gains carbon dioxide through the following ways except

A. Burning of fuel such as coal and wood
B. Respiration by plants and animals
C. Photosynthesis in plants
D. Death and decay of plants and animals

Question 15:

• WAEC 2009

Controlled burning has the advantage of

A. Increasing the number of soil organisms
B. Inducing re-growth of pasture grasses
C. Increasing the amount of nutrients in the soil
D. Improving soil structure