Agronomy MCQs – Set 07 (Manures & Fertilizers)
Agronomy MCQs – Set 07 (Manures & Fertilizers)
Q1. Manures are mainly applied to:
A) Supply nutrients only
B) Improve soil physical properties
C) Improve soil structure and fertility
D) Kill soil pathogens
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Correct Answer: Improve soil structure and fertility
Q2. Which of the following is an organic manure?
A) Urea
B) DAP
C) FYM
D) MOP
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Correct Answer: FYM
Q3. Farmyard manure mainly supplies:
A) Nitrogen only
B) Phosphorus only
C) All nutrients in small amounts
D) Potassium only
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Correct Answer: All nutrients in small amounts
Q4. Which nutrient is present in urea?
A) Phosphorus
B) Potassium
C) Nitrogen
D) Calcium
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Correct Answer: Nitrogen
Q5. The nitrogen content of urea is:
A) 28%
B) 33%
C) 46%
D) 52%
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Correct Answer: 46%
Q6. Which fertilizer supplies both nitrogen and phosphorus?
A) Urea
B) MOP
C) DAP
D) SSP
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Correct Answer: DAP
Q7. Which nutrient is deficient in DAP?
A) Nitrogen
B) Phosphorus
C) Potassium
D) Sulphur
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Correct Answer: Potassium
Q8. SSP is a source of:
A) Nitrogen only
B) Phosphorus and sulphur
C) Potassium only
D) Nitrogen and potassium
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Correct Answer: Phosphorus and sulphur
Q9. Which fertilizer is commonly used as potassic fertilizer?
A) Urea
B) DAP
C) MOP
D) SSP
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Correct Answer: MOP
Q10. Which manure improves soil water holding capacity?
A) Chemical fertilizers
B) Green manure
C) Micronutrients
D) Biofertilizers
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Correct Answer: Green manure
Q11. Green manuring crop commonly used in India is:
A) Wheat
B) Sunhemp
C) Mustard
D) Maize
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Correct Answer: Sunhemp
Q12. Which fertilizer contains highest phosphorus?
A) SSP
B) DAP
C) Rock phosphate
D) MOP
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Correct Answer: DAP
Q13. Excessive use of chemical fertilizers leads to:
A) Improved soil health
B) Soil degradation
C) Increased organic matter
D) Improved soil structure
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Correct Answer: Soil degradation
Q14. Biofertilizers mainly help in:
A) Chemical reactions in soil
B) Increasing nutrient availability through biological processes
C) Supplying all nutrients directly
D) Increasing soil salinity
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Correct Answer: Increasing nutrient availability through biological processes
Q15. Which biofertilizer fixes atmospheric nitrogen?
A) Azotobacter
B) Phosphobacteria
C) Mycorrhiza
D) PSB
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Correct Answer: Azotobacter
Q16. Integrated nutrient management aims to:
A) Use only chemical fertilizers
B) Use only organic manures
C) Combine organic, inorganic and biofertilizers
D) Eliminate fertilizers
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Correct Answer: Combine organic, inorganic and biofertilizers
Q17. Which nutrient deficiency causes yellowing of older leaves?
A) Phosphorus
B) Potassium
C) Nitrogen
D) Iron
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Correct Answer: Nitrogen
Q18. Which fertilizer is acidic in nature?
A) CAN
B) Urea
C) Ammonium sulphate
D) Sodium nitrate
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Correct Answer: Ammonium sulphate
Q19. Which nutrient is responsible for root development?
A) Nitrogen
B) Phosphorus
C) Potassium
D) Calcium
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Correct Answer: Phosphorus
Q20. Balanced fertilization refers to:
A) Applying only nitrogen
B) Applying fertilizers without soil test
C) Applying nutrients in proper proportion based on crop need
D) Applying maximum fertilizer
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Correct Answer: Applying nutrients in proper proportion based on crop need
