Population Size — Unit test Answers

0 verified answers1 views

Free Preview

How do microorganisms affect humus and thereby soil health?

The presence of any microorganisms causes the destruction of humus, which leads to a reduction in soil health.

Microorganisms increase the production of humus, which leads to a decrease in soil health.

Microorganisms increase the production of humus, which leads to an increase in soil health.

Microorganisms exist independently of humus and therefore do not affect soil health.

Free Preview

Which of the following is the most damaging method of soil remediation?

soil excavation and disposal

soil aeration

heating and vapor extraction

microbial digestion

Which of the following is defined as combinations of soil particles that vary in size and shape?

clay

aggregates

silt

loam

Soil is not directly important to animal life.

Which of the following is not a way that humus affects the properties of soil?

Humus expands with increased moisture levels.

Humus increases the movement of water and air in soil.

Humus decreases the porosity of soil.

Humus acts as the basis for soil life.

Did you find these answers helpful?

More from this Course