Terms in this set (14)
Identify what is wrong with this statement: As long as people have enough calories, they will survive.
People can obtain enough calories but still be malnourished because of a lack of certain nutrients.
Why do so many people not have adequate access to food?
The global food supply is unevenly distributed because certain regions are more productive than others, and many crops are used to feed livestock or make biofuels rather than feeding people.
Why do famines occur today?
Famines typically occur when unfavorable natural conditions such as drought are exacerbated by human actions.
Why would people cut down a piece of forest for use in agriculture and then abandon the land a few years later?
This practice helps the soil remain fertile and allows nutrients to re-enter the soil.
Increases in crop yields during the green revolution are attributed to all of the following...
the increased use of fertilizers, the increased use of irrigation in dry areas, and the increased use of pesticides
What is the major difference between modern agriculture and agriculture practiced more than 100 years ago?
We now get most of our food from monocultures, supported by fertilizers and harvested with mechanical equipment
All of the following are associated with industrial agriculture...
Mechanization, high crop productivity, increased cost of land cultivation (NOT an increase in the number of small farming operations)
Why are animals transported into concentrated animal feeding operations (CAFOS)?
To fatten them up quickly so they are more economically valuable
What aspect of concentrated animal feeding operations leads to increased use of antibiotics?
Animals in CAFOS are given antibiotics to counteract the negative effects of being fed food that is not natural for them, such as corn
Why is the loss of crop diversity a potential problem for future agriculture?
Diversity provides resistance to new diseases and may help provide crops capable of doing well in future climates.
What is the best explanation as to why nutrients have to be added to agricultural soils?
You have to replace the nutrients that are removed in the crops.
What is the difference between industrial and organic fertilizers?
Organic fertilizers come from plant or animal matter, whereas industrial fertilizers are synthesized from chemicals or mined from rock
How does irrigation lead to salinization?
Irrigation water naturally contains some salt, which stays in the soil when the water evaporates
What is the most labor intensive means of pest control?
Mechanical pest control