Waec Agricultural Science 2004 Past Questions and Answers

Question 11:

• WAEC 2004

Which of the following processes will not lead to the loss of nutrients from the soil?

A. Erosion
B. Mulching
C. Harvesting
D. Leaching

Question 12:

• WAEC 2004

A disadvantage of using organic manure on the soil is that

A. It decreases the potassuim content of the soil
B. Diseases spread fast
C. It increases the humus content of the soil
D. It reduces the rate of soil water evaporation

Question 13:

• WAEC 2004

Leguminous cover crops do not

A. Bind the soil particles together through their roots
B. Increaes the nitrogen content of soils
C. Aid in improving the soil organic matter content
D. Reduce the soil microbial population

Question 14:

• WAEC 2004

In the nitrogen cycle, nitrite is oxidized to nitrate by

A. Nitrobacter
B. Nitrosomonas
C. Azotobacter
D. Rhizobium

Question 15:

• WAEC 2004

Which of the following will not lead to loss of nitrogen compounds from the soil?

A. Crop removal
B. Burning
C. Lodging
D. Leaching