9.
POLLUTION OF SOIL
193
by pesticides is determined by their extensive use in agriculture.
One of the main factors contributing to the
migration of pesticides in
groundwaters is their solubility. If organochlorine pesticide solubility
is
some milligrams per liter, other pesticides
may have a solubility
of 100-1000 mg/l. Over the course of time, as pesticides leak into
groundwater, they can be washed into the underground waters – the
source of drinking water.
0
5
10
15
20
25
30
Less
developed
countries
Development
countries
OECD
countries
Consum
prion,
tons/k
m
2
Insecticides
Fungicides
Herbicides
0
20
40
60
80
100
120
140
1963
1968
1973
1978
1983
1988
1993
1998
2008
Consumption, kg/ha
Industrially
developed countries
Development countries
0
50
100
150
200
250
Ecuador
Turkey
Canada
Brasil
India
Australia
China
USA
Active substances, tons
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