Name: __________________ 

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Multiple Choice:

Identify the letter of the choice that best completes the statement or answers the question.
1)

There are 16 plant _________ that are necessary for normal growth and production.

  1. fertilizers
  2. fillers
  3. roots
  4. nutrients
Correct Answer d
 
2)

What are the three primary macronutrients that are the main components of fertilizers?

  1. nitrogen, phosphorus and potassium
  2. calcium, magnesium and sulfur
  3. carbon, hydrogen and oxygen
  4. iron, copper and zinc
Correct Answer a
 
3)

What is the nitrogen cycle?

  1. The amount of nitrogen, phosphorus and potassium that are available in the soil
  2. The process that converts nitrogen gas to forms that are usable to plants
  3. The nutrients that are needed by plants in small quantities
  4. The nitrogen gas found in the atmosphere
Correct Answer b
 
4)

When plants or soil are lacking one or more nutrients, ________ can be added to increase available nutrients.

  1. fertilizers
  2. fillers
  3. oxygen
  4. soil
Correct Answer a
 
5)

How is the pH value of soil important for plant nutrition?

  1. The higher the pH value, the better the yield.
  2. The nitrite ions convert to nitrate with nitrobacter bacteria.
  3. The amount of nitrogen, phosphorus, and potassium available are dependent upon the soil pH.
  4. The pH measures the alkalinity and acidity of a substance.
Correct Answer c