Unit 3.2 – Questions

1. A watershed is the land area from which water drains to …

a. a lake
b. a river
c. the ocean
d. the same point


2. Water quality impacts to watersheds include which of the following?

a. industrial waste spills
b. nonpoint source pollution
c. soil erosion and sedimentation
d. all of the above


3. The Environmental Protection Agency identifies what as the number one water pollutant?

a. agricultural chemicals
b. agricultural animal wastes
c. sediment
d. litter


4. Agriculture accounts for what percentage of the nation’s consumptive water use?

a. 33%
b. 59%
c. 72%
d. 80%


5. Marginal lands are those not cropped because of what reasons (check all that appy)?

a. they are less economically productive than currently cultivated land
b. more pesticide and nutrient use is required to gain productivity
c. there is greater potential for erosion and nutrient runoff
d. they are best suited to other uses


6. Which of the following is not likely to happen if more land is needed to grow corn for corn-grain ethanol production?

a. marginal land will be brought into production
b. land in CRP will increase
c. crop rotations will change to support bioenergy demand
d. increases in the use of fertilizers and pesticides
e. ecological intensification of crop production


7. Converting land from CRP to crop production requires careful planning to achieve these goals (check all that apply)?

a. avoid violating CRP contracts by killing grass too early
b. provide sufficient nutrients to the crop in the first year after CRP
c. remove all grass cover so soil can be worked more easily
d. provide a long-term goal of crop productivity and soil and water protection


8. Where possible, planting soybeans the first year after CRP has which of the following advantages.

a. can be planted later in spring, allowing for one more application of herbicide
b. seed soil contact is not critical since soybeans compensate well for skips
c. little need for nitrogen application if soybeans are inoculated well
d. easy to plant no-till
e. all of the above


9. Which of the following in not a goal of Ecological Intensification?

a. producing grain crops nearer their genetic potential yield
b. increasing food, feed and fuel supply
c. reducing environmental impacts of cultivating marginal lands
d. avoiding use of modern technologies
e. preserving habitat


10. The need for Ecological Intensification is driven by which of the following (check all that apply).

a. the increasing global demand for grain
b. the demand for biofuels
c. the desire to protect the environment
d. All of the above

3.2 Answers