Concept: Combustion Process in a Prescribed Burn Setting
Scenario: You are a range manager in the Northern Great Plains in an area where there is extensive woody shrub encroachment and are interested in restoring native grass species. What are some of the management options that could restore native prairie and minimize invasive shrub species?
1. What does a manager need from the environment to mimic a historic wildfire event?
2. Can you explain to me the processes that first absorb and then release energy during a fire?
3. Why would it be more difficult to burn live, green fuel?
4. How can grasses burn differently from trees?
5. Why might dormant or dead grass burn before a dead tree?
6. Can combustion occur rapidly or slowly?
7. What is the relationship between combustion and pyrolysis?
8. Do you feel it is important to gauge the potential pyrolysis of plant material prior to ignition?
9. Would you expect grasses to enter into the smoldering phase of combustion before trees?
10. Between grasses and trees, which would smolder longer?
11. Could this generate more or less heat?
12. How long would a fire last in a grassland without any shrub encroachment?
13. How would the combustion process in a coniferous forest differ from this scenario?
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