APES - Unit 5 Part 2 Study Guide
which of the following statements best describes the most unsustainable method of clear-cutting forests to harvest timber?
All of the trees in a forest are cut down and removed in one operation
which of the following is likely to minimize soil erosion?
No till agriculture
clearing mature, forested land and converting it into agricultural land that would be used for cattle grazing
There will be a reduction in the uptake of atmospheric carbon dioxide
how to prevent soil ersoion
Windbreak, stip cutting, cover cropping, alley cropping, contour farming
soil erosion
a harmful process that involves the removal and transport of soil by wind and water.
commercially used method for harvesting trees and is most likely to lead to a fragmented landscape with serious impacts on biodiversity.
clear - cutting
Overgrazing, excessive plowing, and high pressure irrigation systems all speeds up
desertification
What method of irrigation would best suite a farmer that grows several crops on a farm that has mostly shallow,sandy soil?
drip irrigation
which of the following methods of agricultural irrigation results in the loss of the least amount of water by evaporation?
drip irrigation
A major environmental problem caused by using the agricultural practice of tilling
eutrophication from excessive fertilizer use
Which of the following changes to the hydrolic cycle will result if large areas of land experienced clear-cutting?
evaporation of water from soil will increase
One method farmers use of irrigation on crops?
flood irrigation is often used in agricultural fields, however it increases surface erosion and salinzation of the soil
salinization of the soil, especially if the agricultural fields are located in a warm climate with consistent sunlight
furrow irrigation
Two major effects of soil erosion
higher rates of runoff and shedding water and nutrients
Excessive irrigation in drier climates leads to
increased soil salinization
which is not a disadvantage of deforestation
maintenance of biodiversity
when a rain forest is slashed and burned, the local concentration of carbon dixode in the atmospehre increases primarily due to
oxidation of carbon compounds
Lands managed by agencies of the government
public lands
Irrigation cannot lead to
recharging of aquifers
Desertification usually occurs when
soil productivity decreases due to drought and poor farming practices
What does flood irrigation increase?
surface erosion and salinization of the soil
fundamental characteristic of the green revolution in food resources
the development of new strains of crops with higher yields
