SWS3022 Exam 3 Questions and Answers
What is "green manure"? - Answer-When the plant dies, the fixed nitrogen is mineralized during decomposition, making it available to other plants.
What is the artificial process by which atmospheric N is fixed? How much world energy is used? Also, be famili...
SWS3022 Exam 3 Questions and
Answers
What is "green manure"? - Answer-When the plant dies, the fixed nitrogen is
mineralized during decomposition, making it available to other plants.
What is the artificial process by which atmospheric N is fixed? How much world energy
is used? Also, be familiar with the fact that the product of this process is used as a
foundation for the production of a number of N fertilizer types. - Answer-It's called the
Haber-Bosch process. It uses 1-2 percent of the world's energy.
What is deamination and what is the product of deamination? - Answer-The overall
process of converting organic forms of nutrients to inorganic forms. The product is
ammonium (NH4+).
Understand nitrification and the conditions necessary. - Answer-Nitrification is when
ammonium is converted to nitrate (NO3-). Conditions are controlled by pH (high pH =
aerobic conditions, low pH = anaerobic conditions).
Know the differences between aerobic and anaerobic heterotrophs, particularly with
respect to typical elements used as electron acceptors. - Answer-Aerobic heterotrophs
use oxygen as electron acceptors and anaerobic heterotrophs use other elements, such
as sulfur and nitrogen, as electron acceptor.
Know how aerobic and anaerobic conditions influence the decomposition of organic
matter. - Answer-Aerobic conditions allow higher rates of decomposition and anaerobic
conditions inhibit these rates.
Understand basically how high levels of organic materials built up in the Everglades
historically. - Answer-Historical flooding caused these areas to have anaerobic
conditions and therefore slowed down the decomposition rate of organic materials,
causing build up.
Know the basics of the historical flow regime in the Everglades compared to today. -
Answer-Basically, the range of historical flow is much larger than modern flow due to
human disturbances and (draining out lands, man made channels, etc.)
Understand the basics of soil subsidence in relation to histosols in south Florida. -
Answer-Loss of organic matter due to more present aerobic conditions caused by
drainage of lands.
Know the three primary macro nutrients. - Answer-Nitrogen, Phosphorus, and
Potassium
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