Waec Agricultural Science 2008 Past Questions and Answers

Question 11:

• WAEC 2008

The three most important physical factors that influence rock weathering are

A. Colour,particle size and hardness of rock
B. Particle size,hardness and degree of cementation
C. Hardness,degrss of cementation and colour
D. Particle size, temperature and colour

Question 12:

• WAEC 2008

Which of the following statement is not true about waterlogged soils?

A. Such soils are heavily leached
B. Dentrifying bacteria are more active in such soil than nitrifying bacteria
C. Nitrosomonas yield bet in such soils
D. Soil temperature is usually low

Question 13:

• WAEC 2008

Which of the following crops should be planted on a piece of land that has been repeatedly cropped with maize?

A. Guinea corn
B. Millet
C. Rice
D. Cowpea

Question 14:

• WAEC 2008

sources of nitrogen to the soil include the following except

A. Lightening
B. Urea
C. Blue-green algae
D. Residues of burning activities

Question 15:

• WAEC 2008

Which of the following statements about bush burning is false?

A. It releases mineral nutrients bound in plant tissues
B. It encourages the growth of fresh grasses
C. The heat generated destroys pests
D. The heat generated increases the population of soil organisms