AGN 115 Exam 4 questions and
answers graded A+
Vernalization is
A. is an effect of one species on another through chemicals
B. can be used to suppress the germination and growth of weeds
C. the process by which many winter planted crops are converted to reproductive growth
D. all of the above
E. both a and b - correct answer ✔✔C. the process by which many winter planted crops are
converted to reproductive growth
In terms of agro-ecosystem diversity, an example of undesirable "simplification" of the system
would be the loss of predatory insects through indiscriminate use of a broad-spectrum
insecticide. (Ch. 17)
True or False? - correct answer ✔✔True
Alleycropping, silvopasture, buffers, windbreaks, and forest farming are all examples of
agroforestry production systems.
True or False? - correct answer ✔✔True
Dung beetles are valuable for incorporating cattle waste back into the soil. Which of the
following considerations should be taken when applying pesticides for cattle parasites and flies
to minimize damage to dung beetle populations? (Grazing systems lecture)
,A. select a compound known to do less damage to the "off-target" dung beetles, such as
Moxidectin instead of Ivermectim
B. Time the application of the pesticide so it does not coincide with dung beetle reproduction
C. consider the average stock density of cattle in the field where the pesticide is being applied
D. all of the above are important considerations
E. both A and B are important considerations
F. both B and C are important considerations - correct answer ✔✔E. both A and B are important
considerations
Generally speaking, the Hessian "Fly Free" date for SW Missouri is around October 14. (Pest
management Lec.)
True or False - correct answer ✔✔True
Select all FALSE statements about roller-crimping a cover crop.
Roller-crimping is most effective early in the morning.
Roller-crimping success requires waiting one week between rolling and planting for cover crop
death.
Roller-crimping can potentially create residue cover of 85% or more for the growing season.
Roller-crimping works by breaking the cover crop stems in multiple places, eliminating the need
to use an herbicide to kill the cover crop. - correct answer ✔✔Roller-crimping success requires
waiting one week between rolling and planting for cover crop death.
Living mulch is _______. (Overview of Cover Crops and Green Manures, Preston Sullivan).
A. a cover crop established after harvesting the main crop and is used primarily to reduce
nutrient leaching from the soil profile.
, B. a winter cover crop planted in late summer or fall to provide soil cover during the winter.
C. a cover crop planted alongside the main crop to attract pest insects away from the main crop
in order to reduce the need for pesticide application.
D. a cover crop that is interplanted with an annual or perennial cash crop - correct answer
✔✔D. a cover crop that is interplanted with an annual or perennial cash crop
According to the assigned reading on pasture management, a surfactant is the process of using
a boom type sprayer, boom-buster nozzle, airplane, or helicopter to treat larger weed
infestations with a solution of herbicide and water.
True or false - correct answer ✔✔False
A cover crop is
the use of plastic to cover winter vegetable crops to reduce runoff and increase soil
temperature
any crop grown to provide soil cover. It can be incorporated as a "green manure".
trees planted across hillsides to reduce over land flow of runoff
always incorporated into the soil - correct answer ✔✔any crop grown to provide soil cover. It
can be incorporated as a "green manure".
The common type of tall fescue grass grown in Missouri has a fungal endophyte symbiont. The
toxin produced by the fungus can cause _______ disorders. [Select all correct answers.]
"fescue foot"
vernalization
"summer slump"
mycorrhizal associations
answers graded A+
Vernalization is
A. is an effect of one species on another through chemicals
B. can be used to suppress the germination and growth of weeds
C. the process by which many winter planted crops are converted to reproductive growth
D. all of the above
E. both a and b - correct answer ✔✔C. the process by which many winter planted crops are
converted to reproductive growth
In terms of agro-ecosystem diversity, an example of undesirable "simplification" of the system
would be the loss of predatory insects through indiscriminate use of a broad-spectrum
insecticide. (Ch. 17)
True or False? - correct answer ✔✔True
Alleycropping, silvopasture, buffers, windbreaks, and forest farming are all examples of
agroforestry production systems.
True or False? - correct answer ✔✔True
Dung beetles are valuable for incorporating cattle waste back into the soil. Which of the
following considerations should be taken when applying pesticides for cattle parasites and flies
to minimize damage to dung beetle populations? (Grazing systems lecture)
,A. select a compound known to do less damage to the "off-target" dung beetles, such as
Moxidectin instead of Ivermectim
B. Time the application of the pesticide so it does not coincide with dung beetle reproduction
C. consider the average stock density of cattle in the field where the pesticide is being applied
D. all of the above are important considerations
E. both A and B are important considerations
F. both B and C are important considerations - correct answer ✔✔E. both A and B are important
considerations
Generally speaking, the Hessian "Fly Free" date for SW Missouri is around October 14. (Pest
management Lec.)
True or False - correct answer ✔✔True
Select all FALSE statements about roller-crimping a cover crop.
Roller-crimping is most effective early in the morning.
Roller-crimping success requires waiting one week between rolling and planting for cover crop
death.
Roller-crimping can potentially create residue cover of 85% or more for the growing season.
Roller-crimping works by breaking the cover crop stems in multiple places, eliminating the need
to use an herbicide to kill the cover crop. - correct answer ✔✔Roller-crimping success requires
waiting one week between rolling and planting for cover crop death.
Living mulch is _______. (Overview of Cover Crops and Green Manures, Preston Sullivan).
A. a cover crop established after harvesting the main crop and is used primarily to reduce
nutrient leaching from the soil profile.
, B. a winter cover crop planted in late summer or fall to provide soil cover during the winter.
C. a cover crop planted alongside the main crop to attract pest insects away from the main crop
in order to reduce the need for pesticide application.
D. a cover crop that is interplanted with an annual or perennial cash crop - correct answer
✔✔D. a cover crop that is interplanted with an annual or perennial cash crop
According to the assigned reading on pasture management, a surfactant is the process of using
a boom type sprayer, boom-buster nozzle, airplane, or helicopter to treat larger weed
infestations with a solution of herbicide and water.
True or false - correct answer ✔✔False
A cover crop is
the use of plastic to cover winter vegetable crops to reduce runoff and increase soil
temperature
any crop grown to provide soil cover. It can be incorporated as a "green manure".
trees planted across hillsides to reduce over land flow of runoff
always incorporated into the soil - correct answer ✔✔any crop grown to provide soil cover. It
can be incorporated as a "green manure".
The common type of tall fescue grass grown in Missouri has a fungal endophyte symbiont. The
toxin produced by the fungus can cause _______ disorders. [Select all correct answers.]
"fescue foot"
vernalization
"summer slump"
mycorrhizal associations
