Use Chapter 8 (Soil) and Chapter 16 (Pests) as a Reference
- Complete using your textbook to find answers to the following
questions. Next week we will spend
going over this information and answering any questions that come up. Good luck and have fun! Be sure to look at the grading criteria
before and during your work.
- Outline shows a
conscientious effort to be complete and explain the questions posed. Most answers are correct.
- Student shows depth of
answers by explaining, defining, and giving examples where
appropriate. If there is a sentence
or less for each question, this grading criterion is not met.
1. Explain, using
the three properties of soil listed in your text, why clay has poor water infiltration qualities and poor
workability, but good nutrient holding capacity.
2. Explain, using the three properties of soil listed
in your text, why silt is listed as medium in each category of table 8-2.
3. What is the function of weathering in
relation to soil fertility?
- If weathering is too slow to provide adequate plant nutrients, what
5. What is the relationship between water
pollution and leaching?
- What type of soil would have the highest
nutrient holding capacity, sand or loam?
- Why is fertilizer used in farming? How are inorganic and organic
fertilizers similar? How are they
- Why do plants wilt?
- What is the relation between infiltration and
- What type of soil has high water-holding
capacity, sand or clay? Why?
- Why is it important for soil to have sufficient
aeration? How does aeration
- What is humus?
Why is it important to soil fertility?
- What are
the characteristics that a soil must have to support a crop? Explain each briefly.
- Now that you know a little about soil, describe
it as an ecosystem. Include
detritus, plants and detritus feeders.
Use the terms you have included in question 13.
- How is topsoil lost? Is this a natural process?
- Compare and contrast splash, sheet, and gully
- Once erosion begins it is often difficult to
- How does over cultivation lead to erosion?
- Why is crop rotation being abandoned?
20. What has been the impact of overgrazing in
21. What is the Taylor Grazing Act? Why has it lead to habitat destruction of
22. Why does erosion increase when deforestation
occurs? Why are rainforest more effected
than other types of forests?
Chapter 16: Pests
- Define the term pest.
- What are the benefits to using the chemical approach?
- What is ecological control? Explain
the basic premise.
- What is IPM?
- Explain the negative effects
of using the chemical approach by describing the following:
explain how this involves evolution.
c) Secondary outbreaks
d) Human health effects
e) Environmental effects: include in your answer biological magnification.
- Discuss biological control of pests by describing the following:
a) Cultural control of pests
b) Control by natural enemies
c) Genetic control (Control with chemical barriers,
physical barriers, and sterile males)
d) Natural chemical control