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 141: Which of the following insects transmits swollen shoot disease of cocoa? Options:
  A) stem borer
  B) mealybug
  C) whitefly
  D) scale insect
  Show Answer
  The correct answer is B .
• Question 142:

  Which of the following nutrient element is a macro-nutrient?

  Options:
  A) phosphorus
  B) zinc
  C) iron
  D) manganese
  Show Answer
  The correct answer is A .
• Question 143:

  Which of the following parts of plants are normally used for vegetative propagation?

  Options:
  A) Fruit, leaf and root.
  B) Stem, root and leaf.
  C) Fruit, leaf and flower
  D) Leaf, flower and stem.
  Show Answer
  The correct answer is B .
• Question 144:

  The most common grazing system in West Africa is

  Options:
  A) continuous grazing
  B) rotational grazing
  C) deferred grazing
  D) zero grazing
  Show Answer
  The correct answer is B .
• Question 145:

  In poultry nutrition, the minerals that prevent the laying of thin-shelled eggs are

  Options:
  A) calcium and phosphorus
  B) sodium and calcium
  C) phosphorus and sodium
  D) sulphur and phosphorus
  Show Answer
  The correct answer is A .
• Question 146:

  The effects of practicing crop rotation include the following except

  Options:
  A) maintaining and improving soil fertility
  B) controlling soil erosion
  C) adding humus to the soil
  D) preventing the build-up of pests and diseases
  Show Answer
  The correct answer is C .
• Question 147:

  All but one are related to surface irrigation?

  Options:
  A) Mole drainage
  B) Natural flooding
  C) Sprinkler irrigation
  D) Check flooding
  Show Answer
  The correct answer is D .
• Question 148:

  __________ is the distance of the sown seed in the soil from the soil surface

  Options:
  A) Planting height
  B) Planting depth
  C) Planting width
  D) Plant deep
  Show Answer
  The correct answer is B .
• Question 149:

  _________ is concerned with the study of the inter-relationships between groups of organisms living together in an area

  Options:
  A) Autecology
  B) Synecology
  C) Ecosystem
  D) Ecology
  Show Answer
  The correct answer is B .
• Question 150:

  What are the main components of soil?

  Options:
  A) Water, nutrients, and microorganisms
  B) Organic matter, minerals, and air
  C) Sand, silt, and clay
  D) All of the above
  Show Answer
  The correct answer is D .