Are you wondering where you can find NECO Agricultural Science questions that can guide you before participating in the NECO exams? Look no further! We've compiled a comprehensive list of past questions and answers to aid you in your preparations.
Objective Questions:
The National Examinations Council (NECO) conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January, respectively. Here are some past objective questions and answers to help you gauge your understanding:
Question 1
The type of energy obtained from the sun for agricultural uses is known as
A. potential energy
B. mechanical energy
C. Nuclear energy
D. solar energy
E. kinetic energy
Answer: E
Question 2
Which of the following implements will be used for the next farm operation after clearing new farmland?
A. harrow
B. Ridger
C. Cultivator
D. planter
Answer: B
Question 3
Which of the following cannot be used to rub the metal parts of farm tools before storage?
A. grease
B. palm oil
C. water
D. petroleum jelly
E. spent engine oil
Answer: C
Question 4
The common surveying equipment for farmland includes the following except
A. ranging pole
B. prismatic compass
C. measuring tape
D. Gunter’s chain
E. spade
Answer: E
Question 5
An example of a fungal disease of stored grains is
A. rosette
B. wilt
C. soft rot
D. damping off
E. mold
Answer: E
Question 6
Which of the following farm animals possess a pair of caeca?
A. pigs
B. cattle
C. sheep
D. rabbits
E. fowl
Answer: B
Question 7
The head of the tapeworm is known as the
A. sucker
B. rostellum
C. scolex
D. hook
E. Segment
Answer: D
Question 8
Man contributes to the formation of soil by
A. applying radioactive substances on the earth’s crust.
B. excessive use of agrochemicals.
C. irrigating the land.
D. practicing clean-clearing.
E. quarrying of rocks.
Answer: D
Question 9
Intra-zonal soil with high salt concentration is regarded as
A. alluvial.
B. calcimorphic.
C. holomerphic.
D. hydromorphic.
E. pedalfers.
Answer: A
Question 10
When a growing plant shows chlorosis with parallel yellowish streaks along the veins of the leaves, the soil is likely to be deficient in
A. boron.
B. magnesium
C. phosphorus
D. potassium.
E. sulphur.
Answer: B
Question 11
It is advisable to allow the decomposition of farmyard manure in the soil before planting in order to
A. avoid the destruction of soil structure.
B. discourage the wastage of undecomposed manure.
C. prevent the introduction of disease pathogens.
D. protect the crop roots from the heat generated.
E. reduce the compaction of the soil by the manure.
Answer: E
Question 12
Nitrogen is made available to plants in the form of nitrates through the process of
A. ammonification and denitrification.
B. nitrification and ammonification.
C. nisriricaucr and denitrification.
D. putrefaction and ammonification.
E. volatisation and nitrification.
Answer: B
Question 13
An effect of pollution on agricultural production is that it
A. causes soil nutrient loss.
B. destroys soil beneficial organisms.
C. leads to the fast growth of crops.
D. prolongs crop maturity.
E. reduces disease infection.
Answer: B
Question 14
A disadvantage of natural incubation is that
A. the eggs cannot be candled
B. the chicks are less healthy
C. The brooding hens sometimes abandon the eggs
D. it takes a longer time for eggs to hatch
Answer: C
Question 15
Ruminants fed on dried grasses are given feed supplements to
A. increase water intake
B. provide bulk to feed
C. Reduce microbial activity
D. Provide deficient nutrients
Answer: D
Theory Questions and Answers
Question 1A
Outline three solutions to each of the following problems of agricultural development in Nigeria.
(i) Inadequate land
Answer: They are
1. Promote Sustainable Farming Practice
2. Land Use Planning and Reform
3. Encourage Urban Agriculture and Community Gardens
(ii) Inadequate Credit Facilities
Answer: They are
1. Establish Agricultural Credit Cooperatives
2. Government-Backed Loan Programs:
3. Promote Microfinance Institutions:
Question 1B
State three governmental organizations that are involved in improving agricultural production in Nigeria.
Answer: They are
1. Federal Ministry of Agriculture and Rural Development (FMARD)
2. National Agricultural Extension and Research Liaison Services (NAERLS)
3. Agricultural Development Programs (ADPs)
Question 1C
(i) List three post-planting operations that require the use of mechanical power on the farm.
Answer: They are
1. Harvesting
2. Threshing
3. Weeding
(ii) Enumerate four ways of improving agriculture through mechanization.
Answer: They are
1. Increased Efficiency
2. Enhanced Productivity
3. Labor Savings
4. Precision Agriculture
Question 2A
(i) Define the term “Allelomorphs
Answer: Allelomorphs are alternative forms of a gene that occupy the same position (locus) on a pair of homologous chromosomes.
These different versions of a gene, or alleles, can influence specific traits or characteristics in an organism.
(ii) Outline three disadvantages of artificial insemination in animal
Answer: They are
1. Reduced Genetic Diversity
2. Technical Expertise and Equipment Costs
3. Risk of Disease Transmission
Question 3A
(i) Define drainage.
Answer: Drainage refers to the systematic removal or control of excess water from the soil, usually through artificial means, to create optimal conditions for plant growth.
It helps prevent waterlogging and ensures a well-aerated soil environment.
(ii) Enumerate two types of drainage.
Answer: They are
1. Surface Drainage
This involves the removal of excess water from the soil surface through channels, ditches, or slopes, preventing water accumulation and surface runoff.
2. Subsurface Drainage
Subsurface drainage focuses on removing excess water from below the soil surface, typically using pipes or tiles buried at various depths.
This helps lower the water table and prevents waterlogging.
Question 3B
List four merits of controlled burning as a farming practice.
Answer: They are
1. They help in weed and pest control
2. They help in nutrient recycling
3. They help reduce fire hazards
4. They help to improve grazing conditions
Question 3C
Mention one function of each of the following micronutrients in the soil.
(i) Copper
Answer: Copper plays a crucial role in the activation of enzymes involved in photosynthesis, helping plants produce energy and facilitating overall growth.
(ii) Boron
Answer: Boron aids in cell wall formation and helps regulate various physiological processes in plants, including the metabolism of carbohydrates and the development of seeds and fruits.
(iii) Zinc
Answer: Zinc is essential for the synthesis of plant growth hormones and proteins.
It supports various biochemical reactions, including the formation of chlorophyll for photosynthesis and the development of new tissues.
Question 3D
Outline three main physical weathering agents for soil formation in Nigeria.
Answer: They are
1. Temperature Changes
2. Wind Erosion
3. Biological Activity
Remember, utilizing past questions is a fantastic way to prepare for exams, but also ensure you understand the concepts behind the questions for a comprehensive grasp of the subject matter.
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