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Click on the image
When phenophtaleine turns
pink, this indicates that the
pH of the water in contact with
the soil is above 9:Process
of sodification (J. Porta)
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Click on the image
Degradation processes by sodification: dispersed sodic clay.
(J. Porta)
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Click on the image
The highly alkaline water
dissolves the organic matter
and on evaporation deposits
a black crust on the soil
surface. Indus-Ganges
nplains (India)
(J. Porta)
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