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Ag 101
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Crop Production Study Questions

Identify the definition that best fits the following terms:

  1. U.S. farmers produce about $___________________ worth of crops each year.
    1,000,000
    1,000,000,000
    10,000,000,000
    100,000,000,000
    Feedback

  2. Soybeans produced in the United States account for about ________% of world soybean trade.
    1
    10
    25
    50
    Feedback

  3. Most corn grown in the United States is used for _________________________ production.
    animal feed
    corn chip
    high fructose corn syrup
    ethanol
    Feedback

  4. Which of the following is the number one cash crop grown by U.S. farmers?
    Wheat
    Corn
    Soybeans
    Rice
    Feedback

  5. There are approximately how many farms in the United States?
    10,000
    1,000,000
    2,000,000
    20,000,000
    Feedback

  6. Which of the following is an off-farm impact of soil erosion?
    Lower soil fertility levels
    Development of rills and gullies in the field
    Less water infiltration into the soil
    Decreased water quality downstream
    Feedback

  7. The practice of planting along the slope instead of up-and-down slopes is called:
    Contour farming
    Cover cropping
    Strip cropping
    Terracing
    Feedback

  8. Nitrogen fertilizer is most efficient when applied
    In the fall
    In late winter
    At or after planting
    In late summer
    Feedback

  9. Sources of nutrients that can cause eutrophication and hypoxia in the Gulf of Mexico include:
    Sewage treatment plant discharge
    The atmosphere
    Fertilizer or manure application
    All of the above
    Feedback

  10. Restricted-use pesticides

    Cannot be applied on agricultural fields
    Can only be applied by Certified Applicators
    Should only be applied in the fall
    Are illegal on most crops
    Feedback

  11. Which of the following is not a reason that irrigation is used?
    To facilitate pesticide application
    Insurance against possible drought
    Moisture may not be available at the optimum time for crop growth
    To improve crop quality
    Feedback

  12. Since 1987, irrigated acres in the U.S. have been
    Steadily decreasing
    Steadily increasing
    Staying about the same
    Increasing in the West but decreasing in the East
    Feedback

  13. Positive effects of drainage on water quality include:
    Decreased loss of nitrogen to streams
    Decreased soil erosion
    Increased health of aquatic and wetland vegetation
    All of the above
    Feedback

  14. Perforated subsurface drains are often called "tiles" because
    They are square like tiles
    They are placed in a grid like a tiled floor
    An early plastic tubing manufacturer called them “tiles” as part of its brand name
    They used to be made of clay pipe called tiles
    Feedback

  15. Drainage systems are usually designed to:
    Lower the water table within a few hours after a rain
    Lower the water table within a few days after a rain
    Flow throughout the year
    Prevent excessive loss of nitrogen from the field
    Feedback

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