Waec Agricultural Science 1996 Past Questions and Answers

Question 11:

• WAEC 1996

In an experiment to determine the percentage of humus content in a soil, the following results were obtained:
mass of dish = 10 gm
mass of dish and oven-dry soil = 50 gm
mass of dish and soil after heating = 40 gm
Calculate the percentage of humus in the soil sample.

A. 10 %
B. 25%
C. 60%
D. 75%
E. 80%

Question 12:

• WAEC 1996

The texture and the mineral composition of soil depend mainly on

A. Topography
B. Light intensity
C. Organic matter
D. Parent material
E. Temperature

Question 13:

• WAEC 1996

Which of the following types of fertilizer is recommended for use in high quantities for groundnut production?

A. Nitrogen fertilizer
B. Phosphorus fertilizer
C. Potassium fertilizer
D. Compost
E. Potassium and calcium fertilizer

Question 14:

• WAEC 1996

Lodging in crops is caused by excess supply of

A. Potassium
B. Sulphur
C. Iron
D. Nitrogen
E. Sodium

Question 15:

• WAEC 1996

Adoption of clean clearing of land in the tropical rain forest is not advisable because it

A. Encourages erosion arid leaching
B. Is very expensive
C. Is very difficult to practise
D. Eprives the farmer of continous use of wood
E. Encourages compaction of soil