Waec Agricultural Science 2016 Past Questions and Answers

Question 16:

• WAEC 2016

Which of the following statement is a disadvantages of decaying organic matter in soils?

A. Bacterals and fungal growth is enhanced
B. Minerals in organic matter are released into the soil
C. Physical condition of soil is enhanced
D. Water-holding capacity of soil is improved

Question 17:

• WAEC 2016

Lost soil nutrients can be replenished by the following methods except

A. Organic manuring
B. Fertilizer application
C. Continuous grazing
D. Cover cropping

Question 18:

• WAEC 2016

In the carbon cycle, carbon dioxide in the air may be replenished by

A. Respiration
B. Transpiration
C. Lighting
D. Denitrification

Question 19:

• WAEC 2016

Irrigation can be described as the

A. Reduction of soil water
B. Spraying of minerals on plants
C. Application of dissolved fertilizers to the soil
D. Application of water to the soil

Question 20:

• WAEC 2016

Which of the following conditions is a characteristic of a poorly drained soil?

A. Presence of a large number of termites
B. Presence of high amount of humus
C. Decrease in the activities of micro organisms
D. High soil fertility and productivity