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 271:

  Which of the following is not an advantage of drip-irrigation?

  Options:
  A) fertilizers can be applied through the system
  B) there is reduction in the concentration of salt in the root zone
  C) the system operates on a much lower line pressure than sprinkler system
  D) its efficiency on water distribution in steep slopes is poor
  Show Answer
  The correct answer is D .
• Question 272:

  Which of the following is a potential disadvantage of agricultural extension?

  Options:
  A) Lack of access to extension services in remote areas
  B) Increased farmer knowledge and skills
  C) Strengthened farmer-government relationships
  D) Enhanced adoption of improved farming practices
  Show Answer
  The correct answer is A .
• Question 273:

  The followings are functions of a sprayer except

  Options:
  A) It can be used to control the growth of weeds
  B) It can be used to control the effects of pest.
  C) It can be used to plant seeds
  D) It can be used to spray disinfectant.
  Show Answer
  The correct answer is C .
• Question 274:

  What is the primary objective of agricultural research?

  Options:
  A) Developing new farming technologies
  B) Increasing crop diversity
  C) Promoting organic farming practices
  D) Enhancing agricultural productivity and sustainability
  Show Answer
  The correct answer is D .
• Question 275: A hypothesis can be described as Options:
  A) predictive statement relating to experimental variables
  B) a postulate of general acceptance
  C) a research reasoning based on an accurate statement about the population
  D) a postulate based on experimental samples
  Show Answer
  The correct answer is A .
• Question 276: The most devastating agent of erosion is Options:
  A) wild wind
  B) slope
  C) run-off water
  D) rodents.
  Show Answer
  The correct answer is C .
• Question 277:

  An advantage of extensive system of rearing goats is

  Options:
  A) low labour requirement
  B) easy control of disease
  C) indiscriminate mating
  D) exposure to adverse weather conditions
  Show Answer
  The correct answer is A .
• Question 278: The following are advantages of sub-surface irrigation except that Options:
  A) it is suitable for soils with low water holding capacity
  B) it can be used only for specific types of crops
  C) the rate of evaporation is greatly reduced
  D) it reduces the incidence of pests
  Show Answer
  The correct answer is B .
• Question 279:

  What does the term "recombinant DNA" refer to in biotechnology?

  Options:
  A) DNA synthesized in a laboratory
  B) DNA replicated using polymerase chain reaction (PCR)
  C) DNA extracted from ancient fossils
  D) DNA modified to contain genes from different organisms
  Show Answer
  The correct answer is D .
• Question 280:

  Which of the following rocks is formed from shale?

  Options:
  A) marble
  B) slate
  C) quartzite
  D) limestone
  Show Answer
  The correct answer is B .