WAEC Agricultural Science Past Questions & Answers - Page 91

451.

Application of water to the subsoil through perforated pipes is known as

A.

Flooding irrigation

B.

Subsurface irrigation

C.

Spinkler irrigation

D.

Overhead irrigation

Correct answer is D

No explanation has been provided for this answer.

452.

A farmer continuously applies sulphate of ammonia to his faemland for many years, the resulatant soil solution is most likely to

A.

Leave blue litmus paper unchanged

B.

Change blue litmus paper to red

C.

Change red litmus paper to blue

D.

Be rich in soil microbes

Correct answer is B

No explanation has been provided for this answer.

453.

The propety of soil which cannot easily be change by a famer is the

A.

Porosity

B.

Structure

C.

Texture

D.

Acidity

Correct answer is C

No explanation has been provided for this answer.

454.

A soil sample with a pHof 4.5 is said to be

A.

Acidic

B.

Alkaline

C.

Neutral

D.

Fertile

Correct answer is A

No explanation has been provided for this answer.

455.

What is the percentage water content of soil sample which weighed 180g when fresh and 120g when oven-dried

A.

20.14%

B.

25.00%

C.

33.33%

D.

60.00%

Correct answer is C

No explanation has been provided for this answer.