Agriculture Reference
In-Depth Information
tAble 18.4
estimates of land Area Affected by soil degradation in the developing
countries
Area in developing countries
(mha)
% of the world's degraded
area in the tropics
degradation process
Water erosion
837
77
Wind erosion
457
83
Loss of nutrients
132
97
Salinization (L1)
72
94
Pollution
21
100
Acidification
5
83
Compaction
32
47
Waterlogging
10
91
L1 from Pritchard and Amthor (2005), see Table 18.5.
Source:
Recalculated from Oldeman, 1994.
tAble 18.5
estimates of cropland Area Irrigated and salinized in 2000
cropland area (106ha)
salinized Area
(106ha)
country
total
Irrigated
% salanized
Argentina
25.0
1.6
0.6
37.5
Australia
50.3
2.4
0.2
8.3
China
124.0
54.4
7.5
11.9
Egypt
2.8
2.3
1.0
43.4
India
161.8
54.8
20.0
36.4
Iran
14.3
7.5
2.0
26.6
Pakistan
21.3
18.1
4.5
24.8
South Africa
14.8
1.5
0.2
13.3
Thailand
14.7
5.0
0.45
0.9
United States
177.0
22.4
5.2
23.2
USSR (former)
204.1
19.9
3.5
17.5
World total
1364.2
271.7
72
26.5
Source:
Adapted from Pritchard and Amthor, 2005.
