APES - Unit 5 Part 2 Study Guide

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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


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