A Quiz To Test Your Fertilizer Knowledge

Take this quiz to find out how much you know about Fertilizers. The questions in this quiz will test fertilizer types, fertilizer application and soil nutrients. Answer the following multiple choice questions and then see your score. Better yet, stump your family and friends by asking them to take this quiz.

1. The numbers 10-10-10 stand for the percentage of ___________ in a fertilizer (in that order)?

Phosphorous, potassium, nitrogen
Nitrogen, phosphorous, potassium
Nitrogen, Iron, Zinc
Nitrogen, potassium, phosphorous

2. Which of the following is NOT a primary plant nutrient?

Carbon
Magnesium
Selenium
Iron

3. Nitrogen is present in soils in the form of _________?

Nitrate
Ammonium
A component of soil organic matter
All of the above

4. Which of the following is NOT a way plants use nitrogen?

Making leaves green
Photosynthesis
Help form plant proteins
Absorb from the atmosphere

5. The major sources of phosphorus in runoff are from ____________?

Water moving over bare soil
Lawn clippings and tree leaves left in streets and gutters
Soil from wind erosion
All of the above

6. Nitrogen can be absorbed by plants from the air (nitrogen gas)

True
False

7. Of all the fertilizer nutrients, __________ generally produces the greatest growth response in plants.?

Nitrogen
Phosphorus
Potassium
Magnesium

8. Phosphorus can inhibit the rapid growth of annuals?

True
False

9. Phosphorus helps in the transformation of starches and sugars into nutrients.

True
False

10. Quick-release fertilizers are derived from manufactured, synthetic nutrients.

True
False

11. Potassium regulates the opening and closing of stomata.

True
False

12. Without enough potassium, plants do not efficiently use water.

True
False

13. Which of the following is NOT true about slow-release fertilizers?

Nutrients are immediately available to plants.
Good for well-established lawns.
Green up may take longer.
Require more water during periods of high temperatures.

14. Over application of potassium results in nitrogen deficiency.

True
False

15. Which of the following is NOT an effect of over-application of nitrogen?

Increased soil mineral salts
Stunt root growth
Stunt foliage growth
Excess foliage growth

16. Plants can synthesize nitrogen, potassium and phosphorus.

True
False