The world use land
The world land
The surface of the earth is
approximately 510.072 million sq km. In which
the land area is approximately 148.94 million sq km (29.1%)
and the water area is approximately 361.132 million sq
km (70.9%).
The world area
-Total: 510.072 million sq km (100 %).
-Land: 148.94 million sq km (29.1%).
-Water: 361.132 million sq km (70.9%).
The water area
-Total: 361.132 million sq km (70.9%).
-Pacific Ocean
155.557 million sq km;
-Atlantic Ocean
76.762 million sq km;
-Indian Ocean
68.556 million sq km;
-Southern Ocean
20.327 million sq km;
-Arctic Ocean
14.056 million sq km;…
The land area
-Total: 148.94 million sq km (29.1%).
-Total (not
contain water area in land): 148.647 million sq km (100%).
-Asia : 44.579 million sq km (30%).
-Africa : 30.065 million sq km (20.2%).
-North America : 24.474 million sq km (16.5%).
-South America : 17.819 million sq km (12%).
-Antarctica : 13.209 million sq km (8.9%).
-Europe : 9.938 million sq km (6.7%).
-Australia and Oceania :
8.112 million sq km (5.3%).
The world use land
Arable
land
In geography and agriculture, arable land (from Latin arō “I plough, I farm”) is land
that can be used for growing crops. It includes all land under temporary
crops (double-cropped areas are counted only once), temporary meadows for mowing or market and kitchen
gardens and land temporarily fallow (less than five years). Abandoned land
resulting from shifting cultivation is not included in this category.
Data for arable land are not meant to
indicate the amount of land that is potentially cultivable. As such, it has to
be distinguished from agricultural
land, which, according to Food
and Agriculture Organization's (FAO) definition, additionally includes land
under permanent crops as well as permanent pastures. In 2008, the world's total
arable land amounted to 13,805,153 km², whereas 48,836,976 km² was
classified as "agricultural land."
Although constrained by land mass and
topology, the amount of arable land, both regionally and globally, fluctuates
due to human and climatic factors such as irrigation, deforestation,
desertification, terracing, landfill, and urban sprawl. Researchers study the
impact of these changes on food production.
The most productive portion of arable
land is that from sediments left by rivers and the sea in
geological times. In modern times, rivers do not generally flood as often in
areas employing flood control.
Agriculture land
Agricultural land refers to the share of
land area that is arable, under permanent crops, and under permanent pastures.
Arable land includes land defined by the FAO as land under temporary crops
(double-cropped areas are counted once), temporary meadows for mowing or for
pasture, land under market or kitchen gardens, and land temporarily fallow.
Land abandoned as a result of shifting cultivation is excluded. Land under
permanent crops is land cultivated with crops that occupy the land for long
periods and need not be replanted after each harvest, such as cocoa, coffee,
and rubber. This category includes land under flowering shrubs, fruit trees,
nut trees, and vines, but excludes land under trees grown for wood or timber.
Permanent pasture is land used for five or more years for forage, including
natural and cultivated crops.
The following table shows the
land use in the world:
The features
|
Year
|
Quantity
|
Unit
|
Total
area
|
2011
|
136 096 598
|
km2
|
Density of population
|
2011
|
50.9
|
persons per km2
|
Total area per 1000
population
|
2011
|
19.6
|
km2 per 1000 population
|
Land area
|
2011
|
130 121 447
|
km2
|
Land area per 1000 population
|
2011
|
18.8
|
km2 per 1000 population
|
Land area (%)
|
2011
|
95.6
|
% of total area
|
Water surface
|
2011
|
5 975 151
|
km2
|
Water surface per 1000 population
|
2011
|
0.9
|
km2 per 1000 population
|
Water surface (%)
|
2011
|
4.4
|
% of total area
|
Agricultural land
|
2007
|
49 322 388
|
km2
|
Agricultural land per 1000 population
|
2007
|
7.1
|
km2 per 1000 population
|
Agricultural land (%)
|
2007
|
36.2
|
% of total area
|
Agricultural land (%)
|
2007
|
37.9
|
% of land
area
|
Arable land
|
2007
|
14 121 800
|
km2
|
Arable land per 1000
population
|
2007
|
2.0
|
km2 per 1000 population
|
Arable land (%)
|
2007
|
10.4
|
% of total area
|
Arable land (%)
|
2007
|
10.9
|
% of land
area
|
Arable land (%)
|
2007
|
28.6
|
% of agricultural area
|
Permanent crops
|
2007
|
1 426 704
|
km2
|
Permanent crops per 1000 population
|
2007
|
0.2
|
km2 per 1000 population
|
Permanent crops (%)
|
2007
|
1.0
|
% of total area
|
Permanent crops (%)
|
2007
|
1.1
|
% of land
area
|
Permanent crops (%)
|
2007
|
2.9
|
% of agricultural area
|
Permanent meadows and pastures
|
2007
|
33 773 884
|
km2
|
Permanent meadows and pastures per 1000
population
|
2007
|
4.9
|
km2 per 1000 population
|
Permanent meadows and pastures (%)
|
2007
|
24.8
|
% of total area
|
Permanent meadows and pastures (%)
|
2007
|
26.0
|
% of land
area
|
Permanent meadows and pastures (%)
|
2007
|
68.5
|
% of agricultural area
|
2007
|
39 394 070
|
km2
|
|
2007
|
5.7
|
km2 per 1000 population
|
|
2007
|
28.9
|
% of total area
|
|
2007
|
30.3
|
% of land
area
|
|
Other land
|
2007
|
41 404 989
|
km2
|
Other land per 1000
population
|
2007
|
6.0
|
km2 per 1000 population
|
Other land (%)
|
2007
|
30.4
|
% of total area
|
Other land (%)
|
2007
|
31.8
|
% of land
area
|
The fact
of the world productive land
The world's productive land is a constantly changing
resource. Climatic variations, natural disasters, and human intervention are
ceaselessly at work changing the boundaries of productive land - arable land,
pasture land, and forest.
Arable land covers 3% of the world's surface. Despite the
fact that this land is continually being lost to urbanization, the total area
under cultivation is rising because of deforestation. Demand for agricultural
land continues to increase in line with population growth, resulting in the
clearing of marginal land, such as hillsides. The exploitation of marginal land
is partly responsible for the erosion of the fertile soil layer, increased
drought, the loss of essential soil nutrients, and salt contamination -all
reasons for abandoning the land.
Land used for pasture occupies twice the area of land now
under the plow. Although livestock raising produces less protein per hectare
than grain, especially in developing countries, it enables farmers to take
advantage of marginal land that is less suitable for growing grain.
The loss of productive land can be attributed largely to the
destruction of forests. The cultivation of land once forested, however, has not
stopped the steady decrease in arable land or pasture land.
Finally, the land that produces our food, provides us with
firewood and construction lumber, purifies the atmosphere, maintains
precipitation levels, and slows down erosion is continually decreasing. It is
estimated that one hectare of productive land is lost every 7.67 seconds.
References
No comments:
Post a Comment