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AP Environmental Science Module 31-33 Study Set Front Side Second Page

Terms in this set (9)

Describe the following about genetic engineering
Potential changes in pesticide use: reduces need for pesticides, resistance to herbicide;
Effects on biodiversity:new genes spread to wild plants, alters or eliminates natural plants;
Increased profits: lowers expenses, increase in revenues, higher income, lower price food;
Regulation of genetically modified organisms: no current regulations in USA, some people want to avoid them
Describe the "slash and burn" technique in agriculture. Why can this become a problem?
Slash and burn is cutting down vegetation in piles and then burning it in order to enrich with calcium and magnesium. This could be a problem because deforestation may cause a loss of nutrients and proper soil.
What is desertification? Why is this a problem?
Desertification is the transformation of arable land to desert or unproductive land due to climate land or destructive land use. It is a problem because there becomes less soil to grow crops on.
Intercropping
Two or more crops are planted in the same field to promote synergistic interaction
Crop rotation
crop species in a field are rotated from season to season
Agroforestry
trees and vegetables are intercropped
Contour plowing
plowing and harvesting are done parallel to topographic contours
What is no-till agriculture? What is an advantage and disadvantage of no-till agriculture?
No-till agriculture is an agricultural method in which farmers do not turn the soil between seasons. An advantage is that topsoil erosion is reduced. A disadvantage is an increase use of herbicides.
What is the main goal of an IPM? Are pesticide completes banned in IPM?
The main goal of an IPM is to minimize pesticide inputs. Yes, pesticide completes are banned.
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