2021 Agricultural Science WAEC Objective Past Questions

The branch of crop science which deals with the study of insect pests is __________.

Horse racing and polo are events where horses are used for _________.

The construction of rural feeder roads solves the following access problems in agriculture except _________.

The diagram below illustrates a farm tool. Use it to answer the question below.

The illustrated farm tool is used for ________.

The diagram below illustrates a farm tool. Use it to answer the question below.

The farm implement that could perform a similar function as the illustrated tool is _________.

A tractor-mounted sprayer used on large-scale farms is the  __________.

Which of the following types of farm power does not cause pollution?

In planning a farmstead, the structure which should be located on high elevation is the ___________.

The diagram below illustrates processes in the water cycle. Use it to answer the question below.

The process labeled I is __________.

The diagram below illustrates processes in the water cycle. Use it to answer the question below.

The process labeled II is _________.

The diagram below illustrates processes in the water cycle. Use it to answer the question below.

The major source of water to the plants in the diagram is ________.

The new rock formed when limestone is subjected to great heat and pressure is _________.

Which of the following pairs of raw materials is used in the canning industry?

Micro-organisms that decompose organic matter will function best under __________.

In an experiment to determine the percentage of organic matter in a soil sample, the following data was collected:

Weight of oven-dried soil before burning = 50 g

Weight of oven-dried soil after burning = 28 g

Use the information to answer the question below.

Calculate the weight of organic matter in the soil.

In an experiment to determine the percentage of organic matter in a soil sample, the following data was collected:

Weight of oven-dried soil before burning = 50 g

Weight of oven-dried soil after burning = 28 g

Use the information to answer the question below.

Determine the percentage of organic matter in the soil.

Which of the following practices will improve clay soil?

A farmer practices crop rotation in order to __________.

The phosphorous cycle is described as being sedimentary because phosphorous __________.

The following factors are essential for maize production except ______.

Drying of newly harvested grains before storage helps to increase the  ________.

Yams stored in a barn should be inspected at least once a week in order to _______.

The botanical name of onion is __________.

Okro seeds are sown on 0.72hectares of farmland at a spacing of 60cm by 60cm. calculate the expected plant population.

A plot of land devoted to the cultivation of fruit trees is called ______.

Two species of kola grown for commercial purposes in West Africa are  __________.

Propagation of ginger is generally done using its __________.

Elaeis guineensis and Arachis hypogaea are examples of ________.

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

Which of the following statements is not a reason for carrying out the illustrated farm operation? To _________.

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

Crops which require the illustrated farm operation are ________.

The basic importance of agriculture to a forester is to __________.

A suitable grass for lawns is ____________.

The causative organism of maize rust is a  ________.

Which of the following group of insect pests damage crops by biting and chewing?

The breeds of cattle resistant to trypanosomiasis are ________.

Which of the following features is not a characteristic of a good layer?

The best way for a young animal to obtain colostrums is by _________.

Which of the following statements about slatted floors in livestock housing are true? They

I. Lessen labour requirements

II. Reduce odour in pens

III. Hamper movement of animals

If 0.7kg of feed was fed to chicks per week, determine the cost of feeding the birds for 6 weeks. (1kg of feed costs N5)

Feeds that have more than 18% fibre are classified as ________.

An advantage of zero-grazing is that it _________.

The diagram below illustrates a tool used in animal production. Use it to answer the question below.

The illustrated tool is _________.

The diagram below illustrates a tool used in animal production. Use it to answer the question below.

The illustrated tool is used for  __________.

Formation of blisters on the mouth and the skin around the hoof of farm animals is a symptom of __________.

In sheep production, tapeworm could be controlled by ________.

The table below illustrates the supply schedule for maize. Use it to answer the question below.

The percentage change in quantity supplied for maize is ________.

The table below illustrates the supply schedule for maize. Use it to answer the question below.

Calculate the percentage change in price for maize.

The table below illustrates the supply schedule for maize. Use it to answer the question below.

Determine the elasticity of supply for maize.

A long loan for an agricultural enterprise could be obtained from ________.

Which of the following problems of agriculture could be solved through farmers’ adoption of research findings?