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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

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2. Soybeans produced in the United States account for about ________% of world soybean trade.

   1 10 25 50

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3. Most corn grown in the United States is used for _________________________ production.

   animal feed corn chip high fructose corn syrup ethanol

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4. Which of the following is the number one cash crop grown by U.S. farmers?

   Wheat Corn Soybeans Rice

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5. There are approximately how many farms in the United States?

   10,000 1,000,000 2,000,000 20,000,000

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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

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7. The practice of planting along the slope instead of up-and-down slopes is called:

   Contour farming Cover cropping Strip cropping Terracing

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8. Nitrogen fertilizer is most efficient when applied

   In the fall In late winter At or after planting In late summer

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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

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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

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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

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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

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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

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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

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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

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