Exam (elaborations)
AGRONOMY 370 FINAL EXAM QUESTIONS AND ANSWERS
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AGRONOMY 370 FINAL EXAM QUESTIONS AND ANSWERS
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Name: Score:94 Multiple choice questions
Term 1 of 94
ex: "my duty is to feed the world"
controlled/reduced costs of production
the study of grasslands, which are biomes dominated by herbaceous plants, and their
interactions with other organisms. these interactions embody the "ecology" part of
grassland ecology. another way to put it is the study of different organisms and their
interactions in their grass-dominated environments.
interior- individual (who I am)
interior- group (who We are)
Term 2 of 94
what is sod-forming grass?
reproduction through underground bulbs
tillering primarily from below-ground rhizomes and above-ground stolons
growth primarily through aerial roots
expansion through above-ground runners only
Term 3 of 94
the biggest environmental concern with phosphorous (P) loss from agroecosystems is the
gaseous phase emissions of inorganic P (T/F)
True
False
,Term 4 of 94
how would you define grassland ecology?
rotational grazing where "fresh" pasture is offered to milk cows every 12 hours or so
sum of all above-ground and below-ground plant biomass accumulation in a given area
over a given time
interactions between consumers and their resources
The study of grasslands, which are biomes dominated by herbaceous plants, and their
interactions with other organisms. These interactions embody the "ecology" part of
grassland ecology. Another way to put it is the study of different organisms and their
interactions in their grass-dominated environments.
Term 5 of 94
how much grass-finished beef in the US?
~101.5 million head per year
~1.4 million head per year
multiple acres per cow
~1.5 million head per year
Term 6 of 94
milk production on grass will likely be less on a per cow basis compared to milk production on
grain, but the agronomic and environmental costa of grass production are less than grain
production (T/F)
True
False
,Term 7 of 94
how much grain-finished beef in the US?
~17,000 years before present
~3,000 years before present
~29 million head per year
~1.5 million head per year
Term 8 of 94
what grasslands were found in what is now Washington and Idaho?
driftless area
palouse praire
ecosystem structure
ecosystem services
Term 9 of 94
ex: "I own this tractor, that harvester, and this plow"
exterior- individual (what I do)
interior- group (who we are)
exterior- group (what we do)
termites acting as ecosystem engineers
Term 10 of 94
what is the carrying capacity for beef cows in the upper midwest?
11 to 2 cows per acre
1 to 2 cows per acre
multiple acres per cow
~1.5 million head per year
, Term 11 of 94
when a grass plant is defoliated, it responds by re-translocating resources (carbohydrates and
nutrients) from one part of the plant to another, depending on how much photosynthetic
apparatus remains (T/F)
True
False
Term 12 of 94
what is the purpose of silica bodies in cell walls?
allows plants to tolerate herbivory
allows plants to re-grow rapidly after defoliation
increase root growth relative to shoot growth
respect the plant and the plant will take care of you; all of our flourishing is mutual
Term 13 of 94
what is an example of a "supporting" ecosystem service?
productive soil
sub soil
climate stability
top soil
Term 14 of 94
what works best for C4 photosynthesis?
warm-season plants, best at 60-61 degrees F; higher water and nitrogen use efficiency
warm-season plants, best at 69-74 degrees F; higher water and nitrogen use efficiency
warm-season plants, best at 50-60 degrees F; higher water and nitrogen use efficiency
warm-season plants, best at 70-90 degrees F; higher water and nitrogen use efficiency
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