Managing Our Natural Resources, 6e, Camp - 5

Chapter 1

Our Natural Resources

5

United States Army

FIguRE 1-1 a reconstruction

With this working definition of natural resources as useful to humans in
mind, let's continue. The remainder of this chapter will briefly examine the major
categories of natural resources.

SOIL reSOUrCeS
Land area
The United States has a total land area of 3,675,545 square miles in its 50 states.
That equates to 2.26 billion acres. The surface of our country ranges from 282 feet
below sea level in Death Valley to 20,320 feet above sea level on Mt. McKinley.
This vast area is covered by rocks, sand, water, organic matter, parent material,
subsoil, and soil as well as man-made structures. It is from the topsoil, the uppermost layer of soil, that we must get almost all of our food and natural fibers; it
is also where we, for the most part, live, work, and play. Someone has said that
"Man, despite his artistic pretensions, his sophistication and many accomplishments,
owes the fact of his existence to a six-inch layer of topsoil and the fact that it rains."
Of the land in this country in 1607, there seemed to be no practical limit.
There was more land than it seemed possible to use. Even 100 years later, there
was more land than we could settle. Today, that is no longer true.
In the early twenty-first century, almost one-third of our land area is not
suitable for farming. Another 8 percent is covered by cities, factories, homes,
highways, and other artificial structures. The remaining 60 percent is useful for
food and fiber production. Of that, only about 385 million acres, or 17 percent
of the total, is usable for crop production. An even smaller percentage is prime
farmland, and much of that is of only marginal value because of its location.
The soil's major enemy has been erosion. In the years since our nation began,
we have lost one-third of our topsoil to erosion. Only one-fourth of our cropland
remains undamaged by this menace. Another problem we are beginning to face is

of Fort clatsop is located in
the Lewis and clark national
historical park near astoria,
Oregon. Dense forest had to
be cleared to make way for
the safety of a log fort.



Table of Contents for the Digital Edition of Managing Our Natural Resources, 6e, Camp

Contents
Managing Our Natural Resources, 6e, Camp - Cover1
Managing Our Natural Resources, 6e, Camp - Cover2
Managing Our Natural Resources, 6e, Camp - i
Managing Our Natural Resources, 6e, Camp - ii
Managing Our Natural Resources, 6e, Camp - iii
Managing Our Natural Resources, 6e, Camp - iv
Managing Our Natural Resources, 6e, Camp - v
Managing Our Natural Resources, 6e, Camp - Contents
Managing Our Natural Resources, 6e, Camp - vii
Managing Our Natural Resources, 6e, Camp - viii
Managing Our Natural Resources, 6e, Camp - ix
Managing Our Natural Resources, 6e, Camp - x
Managing Our Natural Resources, 6e, Camp - xi
Managing Our Natural Resources, 6e, Camp - xii
Managing Our Natural Resources, 6e, Camp - xiii
Managing Our Natural Resources, 6e, Camp - xiv
Managing Our Natural Resources, 6e, Camp - xv
Managing Our Natural Resources, 6e, Camp - xvi
Managing Our Natural Resources, 6e, Camp - xvii
Managing Our Natural Resources, 6e, Camp - xviii
Managing Our Natural Resources, 6e, Camp - ixx
Managing Our Natural Resources, 6e, Camp - xx
Managing Our Natural Resources, 6e, Camp - xxi
Managing Our Natural Resources, 6e, Camp - xxii
Managing Our Natural Resources, 6e, Camp - 1
Managing Our Natural Resources, 6e, Camp - 2
Managing Our Natural Resources, 6e, Camp - 3
Managing Our Natural Resources, 6e, Camp - 4
Managing Our Natural Resources, 6e, Camp - 5
Managing Our Natural Resources, 6e, Camp - 6
Managing Our Natural Resources, 6e, Camp - 7
Managing Our Natural Resources, 6e, Camp - 8
Managing Our Natural Resources, 6e, Camp - 9
Managing Our Natural Resources, 6e, Camp - 10
Managing Our Natural Resources, 6e, Camp - 11
Managing Our Natural Resources, 6e, Camp - 12
Managing Our Natural Resources, 6e, Camp - 13
Managing Our Natural Resources, 6e, Camp - 14
Managing Our Natural Resources, 6e, Camp - 15
Managing Our Natural Resources, 6e, Camp - 16
Managing Our Natural Resources, 6e, Camp - 17
Managing Our Natural Resources, 6e, Camp - 18
Managing Our Natural Resources, 6e, Camp - 19
Managing Our Natural Resources, 6e, Camp - 20
Managing Our Natural Resources, 6e, Camp - 21
Managing Our Natural Resources, 6e, Camp - 22
Managing Our Natural Resources, 6e, Camp - 23
Managing Our Natural Resources, 6e, Camp - 24
Managing Our Natural Resources, 6e, Camp - 25
Managing Our Natural Resources, 6e, Camp - 26
Managing Our Natural Resources, 6e, Camp - 27
Managing Our Natural Resources, 6e, Camp - 28
Managing Our Natural Resources, 6e, Camp - 29
Managing Our Natural Resources, 6e, Camp - 30
Managing Our Natural Resources, 6e, Camp - 31
Managing Our Natural Resources, 6e, Camp - 32
Managing Our Natural Resources, 6e, Camp - 33
Managing Our Natural Resources, 6e, Camp - 34
Managing Our Natural Resources, 6e, Camp - 35
Managing Our Natural Resources, 6e, Camp - 36
Managing Our Natural Resources, 6e, Camp - 37
Managing Our Natural Resources, 6e, Camp - 38
Managing Our Natural Resources, 6e, Camp - 39
Managing Our Natural Resources, 6e, Camp - 40
Managing Our Natural Resources, 6e, Camp - 41
Managing Our Natural Resources, 6e, Camp - 42
Managing Our Natural Resources, 6e, Camp - 43
Managing Our Natural Resources, 6e, Camp - 44
Managing Our Natural Resources, 6e, Camp - 45
Managing Our Natural Resources, 6e, Camp - Cover4
http://www.nxtbook.com/nxtbooks/ngsp/autoservice5e
http://www.nxtbook.com/nxtbooks/ngsp/bodystructures13e
http://www.nxtbook.com/nxtbooks/ngsp/refrigerationactech8e
http://www.nxtbook.com/nxtbooks/ngsp/medterminology8e
http://www.nxtbook.com/nxtbooks/ngsp/naturalresources6e
http://www.nxtbook.com/nxtbooks/ngsp/heavydutytruck6e
http://www.nxtbook.com/nxtbooks/ngsp/sportsmedicine2017
http://www.nxtbook.com/nxtbooks/ngsp/agriculturalmechanics
http://www.nxtbook.com/nxtbooks/ngsp/introductoryhorticulture
http://www.nxtbook.com/nxtbooks/ngsp/basicrobotics
http://www.nxtbook.com/nxtbooks/ngsp/weldingprinciplesandapplications
http://www.nxtbook.com/nxtbooks/ngsp/delmars_electricity
http://www.nxtbook.com/nxtbooks/ngsp/modernlivestock_poultryproduction2016
http://www.nxtbook.com/nxtbooks/ngsp/introtoveterinaryscience_2016thirdedition
http://www.nxtbook.com/nxtbooks/ngsp/wildlifeandnaturalresourcemanagement_2016fourthedition
http://www.nxtbook.com/nxtbooks/ngsp/smallanimalcare_management_2016fourthedition
http://www.nxtbook.com/nxtbooks/ngsp/msoffice365_2016intro_illustrated
http://www.nxtbook.com/nxtbooks/ngsp/msoffice365_2016intermediate_illustrated
http://www.nxtbook.com/nxtbooks/ngsp/msoffice365_2016intermediate
http://www.nxtbook.com/nxtbooks/ngsp/msoffice365_2016intro
http://www.nxtbook.com/nxtbooks/ngsp/century21_10e
http://www.nxtbook.com/nxtbooks/ngsp/agriscience6
http://www.nxtbook.com/nxtbooks/ngsp/microsoftoffice2013_first
http://www.nxtbook.com/nxtbooks/ngsp/automotivetech6
http://www.nxtbook.com/nxtbooks/ngsp/dreamweaver_revealed
http://www.nxtbook.com/nxtbooks/ngsp/microsoftoffice2013_intro
http://www.nxtbookMEDIA.com