Try each question on your own first. Use the Show Answer button only after you have selected your option, then read the explanation and revise the related concept from your chapter notes.
1. Which of the following is an essential macronutrient required by plants in large quantities?
A. Iron
B. Zinc
C. Nitrogen
D. Copper
Answer: C. Nitrogen
Explanation: Plants require 16 essential nutrients. Macronutrients (Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sulfur) are needed in large quantities compared to micronutrients like Iron, Zinc, or Copper.
2. Kharif crops are grown during which season in India?
A. Winter season (October to March)
B. Rainy season (June to October)
C. Summer season (March to June)
D. Autumn season only
Answer: B. Rainy season (June to October)
Explanation: Kharif crops (e.g., Paddy, Soyabean, Maize, Pigeon pea) are grown during the rainy season, whereas Rabi crops (e.g., Wheat, Gram, Mustard) are grown in winter.
3. Blue Revolution is related to the increase in production of:
A. Milk
B. Fish
C. Food grains
D. Eggs and poultry
Answer: B. Fish
Explanation: Blue Revolution refers to the growth and development of aquaculture and fish production. White Revolution relates to milk, and Green Revolution to food grains.
4. Which indigenous cattle breed is commonly known for high milk production?
A. Sahiwal
B. Jersey
C. Holstein-Friesian
D. Leghorn
Answer: A. Sahiwal
Explanation: Sahiwal and Red Sindhi are indigenous (local) breeds selected for long lactation periods, while Jersey and Holstein-Friesian are exotic breeds.
5. Growing two or more crops simultaneously in definite row patterns on the same field is called:
A. Mixed cropping
B. Inter-cropping
C. Crop rotation
D. Monoculture
Answer: B. Inter-cropping
Explanation: Inter-cropping involves growing two or more crops in a specific row layout (e.g., 1 row of Soyabean + 2 rows of Maize) to maximize yield and prevent pest spread.
6. Which Italian bee variety is commonly used for commercial honey production in India due to high yield?
A. Apis dorsata
B. Apis mellifera
C. Apis cerana indica
D. Apis florae
Answer: B. Apis mellifera
Explanation: *Apis mellifera* (Italian bee) has high honey-collection capacity, stings less, and stays in a given beehive for long periods.
7. Compost prepared using earthworms to speed up organic matter decomposition is known as:
A. Green Manure
B. Bio-fertilizer
C. Vermicompost
D. Chemical Fertilizer
Answer: C. Vermicompost
Explanation: Vermicompost is rich in organic nutrients produced by breaking down organic waste through the activity of earthworms.
8. Which of the following is an example of a pulse crop rich in proteins?
A. Wheat
B. Pigeon pea (Gram/Arhar)
C. Groundnut
D. Mustard
Answer: B. Pigeon pea (Gram/Arhar)
Explanation: Pulses (such as gram, arhar, lentil, and pea) are rich sources of dietary protein. Cereals provide carbohydrates, and oilseeds provide fats.
9. Pasturage available to honeybees directly determines the:
A. Size of the beehive
B. Taste and quality of honey
C. Lifespan of the queen bee
D. Number of drones
Answer: B. Taste and quality of honey
Explanation: Pasturage refers to the flowers available to bees for nectar and pollen collection, directly governing the flavor and quality of the honey produced.
10. Marine fish farming is carried out using which of the following techniques?
A. Mariculture
B. Floriculture
C. Sericulture
D. Apiculture
Answer: A. Mariculture
Explanation: Culturing marine finfishes and shellfishes (like Pomphret, Mackerel, Tuna, Oysters) in coastal sea waters is called mariculture.
This page contains a chapter-wise objective practice set. Try the questions without checking the answer first, then use the explanation to understand the point you missed. The current page contains 10 questions, so you can practise in smaller sets when you are revising.
Quick revision tip
After the practice set, write down the question numbers you missed and revise only those concepts once more. This makes MCQ practice more useful than repeatedly attempting the same questions without reviewing mistakes.
