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11.Organisms and Populations
easy
Which element is responsible for causing soil salinity ? At what concentration does the soil become saline ?
Option A
Option B
Option C
Option D
Solution
Soil salinity is the salt content in the soil.
Salts are a natural component in soils and water.
The ions responsible for salination are : $\mathrm{Na}^{+}, \mathrm{K}^{+}, \mathrm{Ca}^{2+}, \mathrm{Mg}^{2+}$ and $\mathrm{Cl}^{-}$.
Soil becomes saline at a high soluble salts concentration $(0.2 \%$ or above) or $500 \mathrm{ppm}$ sodium (sodic soil).
Standard 12
Biology
