Rangeland Ecology (Prairie Ecology) Homework

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1. 

How much of the land in Texas is currently classified as rangeland?

2. 

In 1820, about how much of Texas was classified as rangeland?

3. 

A rangeland is ________.

4. 

Which of the following biome types may include rangelands? (choose all that apply)

5. 

The goal or goals of rangeland management is/are: (choose all that apply)

6. 

Historically, the single biggest problem in rangeland management has been __________.

7. 

The factors included in rangeland management are: (choose all that apply)

8. 

Rangeland management __________.

9. 

Rangeland management practices have changed from an early focus on maximizing production of livestock to a focus on: (choose all that apply)

10. 

What ecological principles is grazing management based on? (choose all that apply)

11. 

Different species of animals do not necessarily compete for food in a rangeland. Cattle prefer eating _____, while sheep prefer eating _____, and deer and goats prefer eating _____.

12. 

The basic building block of a grass plant is the _____, which includes the blade, node and sheath of a grass leaf:

13. 

The stem of a grass plant is called the

14. 

Prior to human intervention in Texas, most rangeland was maintained as open grassland by _____. (choose all that apply)

15. 

Native grass pastures that do not receive fertilization or irrigation should be managed so that livestock only take about _____ of the year’s current growth.

16. 

It is not good range management practice to fertilize native grass pastures, because __________.

17. 

The process by which pioneer plants such as grasses and forbs create soil is called __________.

18. 

In areas with existing soil, the natural process of changing plant communities triggered by a disturbance such as fire, drought, overgrazing is called __________.

19. 

True or False: Weeds often are essential to the health of the overall ecosystem, even if not eaten by domestic livestock.

20. 

True or False: A large portion of the 1,500 wildflower species in Texas are considered agricultural or livestock industry weeds.

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