JAMB Agricultural Science Past Questions & Answers - Page 34

166.

A person who is involved in the dissemination of new ideas and techniques from the research institutes to the farmers is called

A.

Biological Extension Officer

B.

Geographical Extension Officer

C.

Agent

D.

Agricultural Extension Officer

Correct answer is D

Agricultural Extension Officer is a person who is involved in the dissemination of new ideas and techniques from the research institutes to the farmers.He acts as an intermediary between researchers and the farmers.
 

167.

Broadcast Crop Planter is designed

A.

To plant seeds along the rows in a ridge

B.

To place the correct number of seed(s) into a hole with regular spacing within and between rows

C.

To plant seeds by random scattering of seeds about the field

D.

To place the correct number of seeds into the soil

Correct answer is C

-Row Crop Planter: This is designed to plant seeds along the rows in a ridge.
-Precision Planters: This is designed to place the correct number of seed(s) into a hole with regular spacing within and between rows.
-Grain Drill Planters: This is designed to place the correct number of seeds into the soil and space them between rows, but not within rows.
 

168.

_______ is a secondary tillage implement

A.

Harrow

B.

Plough

C.

Ridger

D.

Disc plough

Correct answer is A

Harrow is a secondary tillage implement also used for land preparation. It can also be driven by work animals or a tractor. It is used immediately after ploughing and before ridging

169.

The following are advantages of using disc plough over mouldboard plough in West Africa except

A.

Disc plough makes deeper cuts than mouldboard plough

B.

Disc plough buries weeds more completely than mouldboard plough

C.

The disc plough is designed to roll over stumps and obstacles which may easily damage the edges of mouldboard plough

D.

Mouldboard plough makes deeper cuts than disc plough

Correct answer is D

Mouldboard plough makes deeper cuts than disc plough is not one of the advantages of using disc plough over mouldboard plough.

170.

Which of the following is not a component of an incubator?

A.

Electric heater

B.

Temperature

C.

Thermostat

D.

Insulator

Correct answer is B

Temperature is the degree of hotness or coldness of a body