Why might soils rich in organic matter not be fertile

Soil fertility comes from a balance of organic matter AND other mineral nutrients

*100% CORRECT ANSWERS

Question 1

Soil color only reflects the amount of organic matter present in the soil

False

Question 2

Soil compaction can  result in increased flooding in an area

True

Question 3

Which of the following is NOT a defining characteristic of soil?

humidity

Question 4

Why might soils rich in organic matter NOT be fertile?

Soil fertility comes from a balance of organic matter AND other mineral nutrients

Question 5

What characteristic is shared by both inceptisols and entisols, the soils of floodplains?

Both are young and only beginning to develop horizons and a soil profile

Question 6

The high productivity of American agriculture is exemplified by

high crop yields per farm worker.

Question 7

Pastoral farming is best described as

a method of raising livestock and moving herds.

Question 8

How does flooding rice fields reduce the need for herbicides and pesticides in rice farming?

While rice has a submerged growth state, most weeds and pests do not

Question 9

Which of the following is NOT true concerning tropical plantations?

Wheat and corn are common products of tropical plantations

Question 10

Why is Dutch agriculture critically dependant on technology? Choose TWO (2) answers!

1. The Dutch have a cold climate, so they have to find inventive ways to grow  food.

2. Dutch agriculture is characterized by plant production in greenhouses.

Question 11

Which of the following best explains how trees help conserve energy and reduce pollution in cities?

All of these

Question 12

Which of the following organisms is most harmful to the tree it grows on?

Strangler fig

Question 13

Which of the following statements about the interactions between insects and trees is NOT true

Most insects have predatory relationships with trees, rather than mutually beneficial ones

Question 14

Why are environmentalists concerned about the introduction of genetically engineered trees?

Genetically engineered trees could have unexpected interactions with organisms in natural ecosystems.

Question 15

Which of the following is released by trees into the atmosphere?

oxygen

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements

d. changes in climate and historical records

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