Multiple
Choice
Identify the letter of the choice that best completes the statement or answers the
question.
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| 1. | Tillage practices can be
generally defined as conservation tillage if they leave residue on the surface in excess of
_________.
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| 2. | Soybeans grown for food use in
the Midwest are of what life cycle? a. | perennial | b. | winter annual
| c. | annual | d. | biennial | | | | | | | | |
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| 3. | Corn should generally be
planted how deep? a. | .5 | b. | .75 | c. | 1.5 | d. | 3 inches | | | | | | | | |
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| 4. | Lime is most commonly added to
soils that have a pH which is? a. | Very low | b. | very high | c. | neutral | | | | | | |
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| 5. | Seminal roots on a corn plant
develop from the _________. a. | seed | b. | nodes | c. | radical | d. | coleoptile | | | | | | | | |
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| 6. | Organically grown soybean are
always healthier for humans than conventionally grown soybeans.
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| 7. | The movement of water from the
soil into the root cells is due mainly to a process called? a. | transpiration | b. | field capacity | c. | evaporation | d. | osmosis | | | | | | | | |
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| 8. | Soil pH is a measure of
a. | acidity | b. | alkalinity | c. | both A and B | d. | Neither A and B | | | | | | | | |
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| 9. | A insecticide is a pesticide
used to control _________ a. | weeds | b. | insects | c. | pathogens | d. | all of the above | | | | | | | | |
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| 10. | Potato leafhoppers damage
alfalfa by sucking plant sap and injecting ______. a. | nematodes | b. | water | c. | minerals | d. | a toxin | | | | | | | | |
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| 11. | Which of the following elements
is essential to wheat plant growth? a. | boron | b. | cadmium | c. | nickel | d. | gold | | | | | | | | |
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| 12. | Alfalfa, canning peas and
peanuts are examples of __________
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| 13. | Examples of positively charged
plant nutrients (cations) are a. | Manganese | c. | Calcium | b. | Potassium | d. | all of these are correct | | | | |
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| 14. | Global warning caused by
increased greenhouse gases will directly affect which compound used by corn and soybean
plants? a. | NH3 | b. | CO2 | c. | 18-46-0 | d. | 2,4-D | | | | | | | | |
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| 15. | Which of the following forces
commonly cause compaction to soils in the Midwest a. | sunlight | c. | evapotranspiration | b. | heavy
snowfall | d. | heavy traffic | | | | |
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| 16. | Of the following production
costs for growing soybeans in the Midwest, which category is generally the least expensive on a per
acre basis? a. | seed cost | b. | land cost | c. | fertilizer cost | d. | drying cost | | | | | | | | |
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| 17. | Which of the following is
not an example of gene transformation technology? a. | Bt corn | c. | Bollgard cotton | b. | Roundup Ready soybean
| d. | Hybrid field corn | | | | |
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| 18. | In a replicated corn hybrid
performance trial, Hybrid A yielded 161 bu/acre. The coefficient of variation for yield in the trial
was 6.5% and the LSD was 4 bu/acre. Which of the following varieties yielded statistically less than
Hybrid A. a. | Hybrid B at 160.3 bu/acre | c. | Hybrid D at 151.2
bu/acre | b. | hybrid C at 158.2 bu/acre | d. | Hybrid E at 166.5
bu/care | | | | |
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| 19. | Atrazine applications have been
prohibited in some areas of the Midwest because it has been found in _________? a. | animal feed | b. | seed corn | c. | dairy roughage | d. | ground water | | | | | | | | |
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| 20. | A corn grower wishes to plant
15 acres of corn at 32,000 seeds/acre. Each seed corn bag contains 80,000 kernels. The grower will
need to purchase how many bags of seed?
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| 21. | When you are feeling a soil to
determine its textural class, sand feels a. | sticky | b. | smooth | c. | stiff | d. | gritty | | | | | | | | |
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| 22. | Which of the following is a
soil structural class? a. | 52% sand, 22% silt, 28%
clay | c. | well drained | b. | loamy sand | d. | subangular
blocky | | | | |
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| 23. | Using the textural
triangle below, what is the texture of a soil with 60% clay, and 40% sand?
a. | loam | b. | clay | c. | sand | d. | silty clay | e. | sandy clay | | | | | | | | | | |
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| 24. | The analysis of the common
fertilizer stored in a tank like this is:
a. | 82-0-0 | b. | 0-14-42 | c. | 28-0-0 | d. | 18-46-0 | | | | | | | | |
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| 25. | Which one of these samples
would not usually contain Soybean Cyst Nematode cysts or eggs. a. | sandy soil | c. | peat based inoculant | e. | Answers B and C | b. | Certified soybean seed | d. | none of the above | | | | | | |
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| 26. | The amount in pounds of
N-P2O5-K2O per ton of bovine produced manure is
about: a. | 13-14-9 | b. | 20-10-10 | c. | 3-3-8 | d. | 25-10-10 | | | | | | | | |
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| 27. | Using the Grades and Grade
requirements sheet (below), grade the following class of market soybeans in order of first to
last.
a. | 1-2-3-4 | b. | 2-1-3-4 | c. | 1-2-4-3 | d. | 2-1-4-3 | | | | | | | | |
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| 28. | Using the Grades and Grade
Requirements sheet (below), grade the following class of market corn in order of first to
last.
a. | 1-2-3-4 | b. | 2-1-3-4 | c. | 1-2-4-3 | d. | 3-1-2-4 | | | | | | | | |
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