Chapter 9 Quiz

Question 1

T/F: Healthy plants are more resistant to attacks from pathogens or pests, so putting on a lot of extra fertilizer with make them even healthier.

Answer 1

False

Question 2

There are ______ required elements for plant growth.

Answer 2

17

Question 3

T/F: Plant minerals are taken up by both passive and active processes.

Answer 3

True

Question 4

Which of the following is NOT a function of soil in terms of plant growth?

• stores/provides nutrients for the plant
• stores/provides water for the plant
• provides anchorage support for the plant
• provides carbon for the plant

Answer 4

-provides carbon for the plant

Question 5

Soils with finer texture and soils with more organic matter or both tend to be more fertile because they hold onto nutrients well. This is called:

Answer 5

cation exchange capacity

Question 6

Nutrient deficiency symptoms of a mobile nutrient show up in _______ leaves first, while deficiency symptoms of a non-mobile nutrient show up in _______ leaves first.

Answer 6

older, younger

Question 7

T/F: SInce micronutrients are used in such small supply, a plant can get along pretty well without them.

Answer 7

False

Question 8

Of the 3 macronutrients, two (Nitrogen and ______) come from the break-down of organic matter and their availability relies on soil microbial activity. The other macronutrient ________ comes mostly from the weathering of minerals in a soil over time.

Answer 8

Nitrogen, Phosphorus, Potassium

Question 9

What is the best way to know how much fertilizer to apply?

Answer 9

Do a soil and/or a tissue analysis

Question 10

T/F: The C:N ratio of a compost or organic residue isn’t important. The main thing is just adding organic matter!

Answer 10

False

Question 11

If I have 100 lb bag of a 10-10-10 fertilizer, how many pounds of nitrogen does the bag contain?

Answer 11

10.0

Question 12

Which of the following is not a method of fertilizer application?

• broadcasting
• side-dressing
• banding
• balancing

Answer 12

-balancing

Question 13

T/F: Foliar applications are more commonly used for micronutrient deficiencies than for other nutrient deficiencies.

Answer 13

True

Question 14

A large organic molecule that encloses a metal like iron or zinc and prevents it from being tied up in the soil is called a:

Answer 14

chelator

Question 15

If hydroponics is so great, why aren’t more plants grown using hydroponics?

• Hydroponics is usually done inside a greenhouse
• Hydroponics is usually more costly
• All of these
• Hydroponics requires more careful management

Answer 15

-All of these