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1. What are some of the positive environmental benefits of production agriculture?

   Improved soil quality Carbon repository Reduced storm runoff Ground water recharge All of the above

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2. USDA estimates that manure phosphorous exceeds crop needs in what percent of U.S. counties?

   0% 15% 30% 45%

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3. What is the common name for the class of production agricultural plants that do not need commercial nitrogen fertilizer?

   N Converters Maize Legumes Algae

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4. If biodegradable organic matter is added to a stream, fish kills most often result from:

   Lack of oxygen Turbulence Lack of visibility Build up of sludge deposits

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5. Most manure spills that enter streams result from:

   Pastured animals with stream access Rupture of manure storage Improper land application of manure Damage to manure transfer or irrigation pipes Feedlot runoff from animal area All of the above

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6. Nitrogen gas (N₂) account for ___________ % of the atmosphere?

   0% 24% 62% 78% 92%

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7. Nitrogen in manure can take many chemical forms. Which of the following is NOT included?

   Nitrogen gas Organic nitrogen Catatonic nitrogen Ammonia Ammonium

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8. Which nutrient in runoff from agricultural land has been blamed for the hypoxia problem in the Gulf of Mexico?

   Phosphorous Chlorine Sulfur Nitrogen Soil erosion

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9. Which of the forms of nitrogen are volatile?

   NH3 NO3 NO2 NH4

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10. High nitrate levels in drinking water can lead to the following serious condition in infants:

    "Green baby syndrome" Headaches Methemoglobinemia Colic Alzheimer's

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11. The most important method of reducing phosphorous entering streams is:

    Placing riprap along edge of stream Preventing soil erosion Improving field drainage

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12. Which of the following is NOT a significant source of air emissions around a livestock or animal production operation?

    Feed processing Land application of manure Animal production lots and buildings Manure Storage

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