Fertilisers

Last updated: 11/03/2022

AQA A-Level Biology Nutrient Cycle Fertilisers

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Question 1 of 27

1. Question
We use fertiliser to…
- All of these
- Provide nutrients not available in the soil
- Replace nutrients removed at harvest
- Balance nutrients for better produce quality and higher yield
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Question 2 of 27

2. Question
The International Fertilizer Association (IFA) estimates that ——–% of the soils globally are deficient in nitrogen.
- 85
- 93
- 73
- 67
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Question 3 of 27

3. Question
The three most common mineral fertilisers are those based on…
- Nitrogen, phosphorus and potassium
- Nitrogen and sulphur
- Phosphorus and zinc
- All of these
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Question 4 of 27

4. Question
In nature there are ——– key nutrients necessary for plants to thrive.
- 17
- 3
- 25
- 9
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Question 5 of 27

5. Question
Organic products that have been extracted from living things or from the earth are known as…
- Natural fertilisers
- Artificial fertiliser
- Chemical fertilisers
- All of these
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Question 6 of 27

6. Question
Examples of natural fertilisers include:
- All of these
- Compost
- Manure
- Blood meal and bone meal
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Question 7 of 27

7. Question
What is/are the main constituent(s) of chlorophyll, which maintains a balance in the process of photosynthesis?
- Nitrogen, phosphorus and potassium
- Sulphur
- Phosphorus
- All of these
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Question 8 of 27

8. Question
Which chemical fertilisers contain nutrient elements for the growth of crops made by chemical means?
- Inorganic fertilisers
- Organic fertilisers
- Manure
- Compost
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Question 9 of 27

9. Question
Phosphorus fertiliser is beneficial for the growth of ——-
- Roots
- Leaves
- Stems
- None of these
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Question 10 of 27

10. Question
Organic fertilisers can be obtained from…
- All of these
- Agricultural and inudstrial waste
- Livestock manure
- Municipal sludge
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Question 11 of 27

11. Question
Nitrogen content of a nitrogenous fertiliser is 35%. Which fertiliser could it be?
- Ammonium nitrate
- Urea
- Ammonium sulphate
- Calcium ammonium nitrate
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Question 12 of 27

12. Question
Nitrogen content of urea is roughly ________ %?
- 46
- 80
- 94
- 67
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Question 13 of 27

13. Question
Which of the following does not come under the category of ‘micro-nutrient’ for plant growth?
- Carbon
- Chlorine
- Iron
- Boron
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Question 14 of 27

14. Question
Select the incorrect statement:
- All nitrogenous fertilisers are not soluble in water
- A straight fertiliser contains only one nutrient
- Calcium cyanamide is used as weed killer in onion fields
- The phosphorous nutrient makes the plant stem stronger
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Question 15 of 27

15. Question
An excess of nitrogen fertilisers leads to…
- Pest problems
- Delay in fruit formation
- Delayed flowering
- Stunted growth
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Question 16 of 27

16. Question
A bag of fertilisers labelled 10-10-10 contains 10% nitrogen, 10% phosphorus and 10% potassium. This label is a national standard and is known as…
- The Fertiliser grade
- The Standard grade
- Normal Grade
- Uniform grade
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Question 17 of 27

17. Question
Which chemical fertiliser is essential for better rhizobial nitrogen fixation?
- Phosphorus
- Potassium
- Sodium
- Calcium ammonium nitrate
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Question 18 of 27

18. Question
Ammonium nitrate (a fertiliser) is coated with limestone powder to…
- Avoid the risk of explosion
- Increase its nitrogen content
- Cut down its production cost
- Add extra nutrients
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Question 19 of 27

19. Question
Commercial fertilisers are available mostly in the form of…
- Granules
- Powder
- Lumps
- Flakes
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Question 20 of 27

20. Question
Which greenhouse gas can be emitted from the storage of nitrogen-based fertilisers?
- N2O
- OH−
- NO
- O2
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Question 21 of 27

21. Question
Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.
- 25
- 40
- 70
- 85
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Question 22 of 27

22. Question
A fertiliser is said to be ———- when it contains the major nutrients, nitrogen, phosphorus and potassium.
- Complete
- Incomplete
- Ideal
- Functional
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Question 23 of 27

23. Question
Leaching losses of nitrogen can be minimised by…
- All of these
- Making frequent, low-rate applications of soluble fertilisers
- Applying a combination of the two fertiliser materials
- Using controlled-release nitrogen sources
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Question 24 of 27

24. Question
Spreading fertiliser to cover the entire production area is known as…
- Broadcasting
- Topdressing
- Perforating
- Fertigation
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Question 25 of 27

25. Question
pH value of soil is maintained at ____ by the addition of fertiliser for optimum growth and health of the plant
- 7 to 8
- 2 to 3
- 9 to 10
- 12 to 13
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Question 26 of 27

26. Question
Amino acids are examples of organic materials that are ——- in water, so they can leach rapidly.
- Soluble
- Insoluble
- Partially soluble
- None of these
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Question 27 of 27

27. Question
Identify the fertiliser that has low burn potential, relatively slow release and contains micronutrients.
- Manure or sewage sludge
- Slow release fertiliser
- Conventional fertiliser
- All of these
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