# Agricultural Science Questions and Answers

A comprehensive list of Agricultural science questions with answers to help you prepare for JAMB, WAEC, NECO, Post UTME exams.

11.

The diagram above illustrates a farm operation. Study it and answer the question

Examples of crops which require the illustrated farm operation are

A.

Cowpea, millet and okro

B.

Maize, pepper and tomato

C.

Rice, groundnut and millet

D.

Pepper, rice and cowpea

Examples of crops which require the illustrated farm operation are rice, groundnut and millet.

12.

The diagram above illustrates a farm operation. Study it and answer the question

The illustrated farm operation is known as

A.

Winnowing

B.

Milling

C.

Shelling

D.

Threshing

Winnowing is the process of separating the lighter chaff or husk from the heavier grains or seeds after threshing. It is usually done by tossing the mixture of grains and chaff into the air with a winnowing basket or using a winnowing machine. The wind carries away the lighter chaff, allowing the heavier grains to fall back to the ground or into a container.

13.

A beneficial effect of bush burning is that it

A.

Replenishes oxygen in the atmosphere

B.

Increases the organic matter of soil

C.

Encourages the regeneration of grasses

D.

Increases the population of soil microorganisms

When a controlled fire burns through a grassland, it can remove accumulated dead plant material and woody debris, known as thatch. Thatch can hinder the growth of new grass shoots and prevent sunlight and rainwater from reaching the soil surface. By removing the thatch through controlled burning, the fire creates a favorable environment for grass regeneration.

14.

If the seed rate for the cultivation of cowpea is 25 kg per hectare, determine the quantity of cowpea seeds required to cultivate a farmland measuring 100 m by 500 m.

A.

125 kg

B.

50 kg

C.

250 kg

D.

1,250 kg

1 hectare = 10,000 square meters

Area of the farmland = 100 m x 500 m = 50,000 square meters

Now, we can convert the area to hectares:

Area in hectares = 50,000 square meters / 10,000 square meters/hectare = 5 hectares

Next, we can calculate the quantity of cowpea seeds required using the given seed rate:

Seed rate = 25 kg/hectare

Quantity of cowpea seeds required = Seed rate x Area

Quantity of cowpea seeds required = 25 kg/hectare x 5 hectares

Quantity of cowpea seeds required = 125 kg

Therefore, the quantity of cowpea seeds required to cultivate the farmland is 125 kg. The correct answer is "125 kg."

15.

Maceration is carried out in the processing of

A.

B.

Oil palm

C.

Cotton

D.

Cocoa