Agricultural-Science Exam Past Questions and Answers | JAMB, WAEC and NECO

Agricultural science studies farming practices, including soil cultivation for growing crops and raising animals for food, wool, and other products.

• Question 131:

  A biotic factor influencing agricultural production is

  Options:
  A) rainfall
  B) predator
  C) soil structure
  D) wind
  Show Answer
  The correct answer is B .
• Question 132:

  

  From the curve above, at what point is it advisable for the farmer to stop further addition of input?

  Options:
  A) I
  B) II
  C) III
  D) IV
  Show Answer
  The correct answer is C .
• Question 133:

  The soil nutrient which is important as a constituent of plant proteins and hormones is

  Options:
  A) calcium
  B) sulphur
  C) iron
  D) potassium
  Show Answer
  The correct answer is B .
• Question 134:

  The process whereby rocks are broken down into small particles through both physical and chemical factors is known as

  Options:
  A) Rock degradation
  B) Weathering
  C) Erosion
  D) Oxidation
  Show Answer
  The correct answer is B .
• Question 135:

  Water yam is also known as

  Options:
  A) Dioscorea alata
  B) Dioscorea cayenesis
  C) Dioscorea rotundata
  D) Dioscorea bulbifera
  Show Answer
  The correct answer is A .
• Question 136:

  What is the purpose of using a scale of preference in agricultural decision-making?

  Options:
  A) To evaluate the environmental impact of farming practices
  B) To determine the most profitable crops to cultivate
  C) To allocate resources effectively among different activities
  D) To prioritize agricultural tasks based on urgency
  Show Answer
  The correct answer is C .
• Question 137:

  A periodic maintenance activity carried out using a farm tractor is

  Options:
  A) checking of radiator water
  B) checking of tire pressure
  C) cleaning after use
  D) changing of engine oil
  Show Answer
  The correct answer is C .
• Question 138: Crop rotation decreases the incidence of pests by Options:
  A) breaking life cycles of pests
  B) attracting pest predators
  C) sterilizing the soil
  D) maintaining soil fertility
  Show Answer
  The correct answer is A .
• Question 139: In biotechnology, propagation is mainly by Options:
  A) grafting
  B) aerial layering
  C) binary fission
  D) cell culture.
  Show Answer
  The correct answer is D .
• Question 140:

  One of the limitation of mechanization of farms is

  Options:
  A) reduction in the cost of production
  B) exposure of soil to the effects of climate
  C) increase in yield of crops
  D) reduction of farm labour
  Show Answer
  The correct answer is A .