NABTEB Agricultural Science Past Questions And Answers (Objective and Theory)
Section A: Multiple Choice Questions
Question: Which of the following is a benefit of no-till farming?
A) Enhanced soil aeration
B) Increased soil erosion
C) Improved water infiltration
D) Faster weed growth
Answer: C) Improved water infiltration
Question: What is the primary purpose of the process of vernalization in certain crops?
A) Pest control
B) Flowering induction
C) Soil fertility improvement
D) Weed suppression
Answer: B) Flowering induction
Question: Which nutrient deficiency in plants is often indicated by yellowing of leaves, especially between veins?
A) Nitrogen
B) Iron
C) Phosphorus
D) Potassium
Answer: B) Iron
Question: What is the main advantage of hydroponic farming?
A) Reduced water usage
B) Enhanced nutrient absorption
C) Lower equipment costs
D) Minimal environmental impact
Answer: B) Enhanced nutrient absorption
Question: Which of the following is a method of soil conservation involving plowing across the contour lines of a slope?
A) Contour plowing
B) Terracing
C) Strip cropping
D) Crop rotation
Answer: A) Contour plowing
Question: What is the primary purpose of the use of drip lines in irrigation systems?
A) Weed suppression
B) Nutrient absorption
C) Water conservation
D) Pest control
Answer: C) Water conservation
Question: Which greenhouse gas is released from organic matter in flooded rice fields?
A) Carbon dioxide (CO2)
B) Methane (CH4)
C) Nitrous oxide (N2O)
D) Ozone (O3)
Answer: B) Methane (CH4)
Question: What is the primary purpose of a wind turbine in an agricultural setting?
A) Soil aeration
B) Energy generation
C) Pest control
D) Temperature regulation
Answer: B) Energy generation
Question: Which of the following is an example of a cover crop that helps fix nitrogen in the soil?
A) Mustard
B) Sunflower
C) Clover
D) Radish
Answer: C) Clover
Question: In organic farming, what is the alternative to synthetic herbicides for weed management?
A) Crop rotation
B) Mulching
C) Inorganic fertilizers
D) Chemical pesticides
Answer: B) Mulching
Section B: Theory Questions
Question: Discuss the impact of monoculture on agricultural ecosystems and suggest strategies to mitigate its negative effects.
Answer: Monoculture can lead to increased susceptibility to pests and diseases and soil nutrient depletion. Mitigation strategies include crop diversification, agroforestry, and integrated pest management.
Question: Explain the concept of agroecology and how it differs from conventional agricultural practices.
Answer: Agroecology integrates ecological principles into agriculture, emphasizing sustainable and holistic approaches. It differs from conventional practices by promoting biodiversity, reducing chemical inputs, and enhancing resilience to environmental changes.
Question: Elaborate on the role of precision farming technologies in optimizing resource use and improving crop yield.
Answer: Precision farming involves using technologies like GPS, sensors, and data analysis to optimize resource use, enhance efficiency, and improve overall crop yield. It allows for targeted applications of water, fertilizers, and pesticides.
Question: Discuss the concept of food security and the challenges faced in achieving it globally.
Answer: Food security involves ensuring all people have access to sufficient, safe, and nutritious food. Challenges include population growth, climate change, and unequal distribution of resources, requiring global cooperation and sustainable agricultural practices.
Question: Explain the principles of sustainable pest management and provide examples of biological control methods.
Answer: Sustainable pest management involves minimizing the use of chemical pesticides and utilizing biological control methods such as introducing natural predators, releasing sterile insects, and implementing cultural practices to control pest populations.
