WAEC Agricultural Science Past Questions & Answers - Page 61

301.

A soil may be called as alkaline when the pH of the soil is more than

A.

6.5

B.

5.5

C.

7.0

D.

5.0

Correct answer is C

A soil may be called as alkaline when the pH of the soil is more than 7.0 pH scale than is less than 7.0 is acidic while pH scale that is greater than 7.0 is alkaline. pH scale that is equal to 7.0 is neutral. Therefore, choice C is correct.

302.

Blast of rice is a

A.

Viral disease

B.

Bacteria disease

C.

Fungal disease

D.

Deficiency of zinc disease

Correct answer is C

No explanation has been provided for this answer.

303.

Which of the following nutrient is highly immobile in plants?

A.

B

B.

Mg

C.

K

D.

P

Correct answer is A

Boron (B) is highly immobile because of its size.

304.

Ideal pH for coffee cultivation is

A.

4.0 - 4.5

B.

5.0 - 5.5

C.

6.0 - 6.5

D.

6.5 - 7.5

Correct answer is D

No explanation has been provided for this answer.

305.

Fertilizer application in maize should be completed before

A.

Tasseling

B.

Silking

C.

Riponing

D.

Knee high stage

Correct answer is C

No explanation has been provided for this answer.