Population Size — Unit test Answers

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How do organic farming practices relate to soil health?

A
Organic farmers rely on soil health for good crop production.
B
Organic farmers rely on the interaction between soil microbes and organic matter.
C
Organic farmers avoid the use of pesticides and chemicals.
D
all of the above
2
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Which of the following is the most damaging method of soil remediation?

A
soil excavation and disposal
B
soil aeration
C
heating and vapor extraction
D
microbial digestion
3

Dutch agriculture is one of the most labor intensive types of agriculture in the world.

A
T
B
F
4

Salinization increases the concentration of _______ in soil.

A
plants
B
nutrients
C
salt
D
water
5

Which layer of soil is least likely to be penetrated by plant roots?

A
O (organic matter)
B
A (topsoil)
C
B (subsoil)
D
C (parent rock)
6

Why might soils rich in organic matter not be fertile?

A
Soil fertility comes from a balance of organic matter and other mineral nutrients.
B
Large amounts of organic material make soil retain too little water.
C
Soil fertility is a result of the inorganic minerals present.
D
Soils rich in organic material are always highly fertile.
7

Which of the following properties of soil has the greatest effect on plant and microorganism growth?

A
soil texture
B
soil color
C
soil reaction
D
soil consistency
8

Which of the following is not a component of soil?

A
organic material
B
minerals
C
gases
D
none of the above
9

Plants would thrive in soil void of microorganisms.

A
T
B
F
10

Why is volcanic soil (andisol) very fertile?

A
It is rich in minerals from volcanic deposits.
B
It is a young soil with low water retention.
C
It has been leached of mineral nutrients.
D
Volcanic activity warms the soil.
11

Soil composition is not subject to change.

A
T
B
F
12

Explain how microorganisms, humus, and soil health are related.

Answer not available
13

Soils in different regions differ based on the _______.

A
local climate
B
topography of the land
C
native organisms
D
all of the above
14

Explain whether or not you would expect the soil of flood plains (inceptisols and entisols) to be fertile.

Answer not available
15

Explain why the produce from tropical plantations are profitable to the local communities that grow them, but not as profitable as finished goods.

Answer not available

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Population Size — Unit test Answers…