Sodium Adsorption Ratio can be expressed asSAR=Na+Ca2++Mg2+2SAR = \frac{Na^{+}}{\sqrt{\frac{Ca^{2+} + Mg^{2+}}{2}}}SAR=2Ca2++Mg2+Na+

Sodium Adsorption Ratio can be expressed as

$SAR = \frac{Na^{+}}{\sqrt{\frac{Ca^{2+} + Mg^{2+}}{2}}}$

$\frac{Na^+}{\sqrt{\frac{Ca^{2+}+Mg^{2+}}{2}}}$

$\frac{Na^+}{\sqrt{Ca^{2+} + Mg^{2+}}}$

$\frac{Ca^{2+} + Mg^{2+}}{Na^{+}}$

$\frac{Na^{+} + Mg^{2+}}{\sqrt{Ca^{2+} + Mg^{2+}}}$

Correct option is A

Sodium Adsorption Ratio (SAR) indicates the sodality of irrigation water or soil extract. It
is calculated as:
$\frac{Na^+}{\sqrt{\frac{Ca^{2+}+Mg^{2+}}{2}}}$

High SAR indicates potential for soil structure degradation.

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List-I (Land Capability Classes)	List-II (Colour)
(A) Class II	(I) Green
(B) Class IV	(II) Yellow
(C) Class III	(III) Brown
(D) Class I	(IV) Pink

Sodium Adsorption Ratio can be expressed as
$SAR = \frac{Na^{+}}{\sqrt{\frac{Ca^{2+} + Mg^{2+}}{2}}}$

$\frac{Na^+}{\sqrt{\frac{Ca^{2+}+Mg^{2+}}{2}}}$

$\frac{Na^+}{\sqrt{Ca^{2+} + Mg^{2+}}}$

$\frac{Ca^{2+} + Mg^{2+}}{Na^{+}}$

$\frac{Na^{+} + Mg^{2+}}{\sqrt{Ca^{2+} + Mg^{2+}}}$

Correct option is A

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​​Sodium Adsorption Ratio can be expressed asSAR=Na+Ca2++Mg2+2SAR = \frac{Na^{+}}{\sqrt{\frac{Ca^{2+} + Mg^{2+}}{2}}}SAR=2Ca2++Mg2+​​Na+​

​Na+Ca2++Mg2+2\frac{Na^+}{\sqrt{\frac{Ca^{2+}+Mg^{2+}}{2}}}2Ca2++Mg2+​​Na+​​​

​Na+Ca2++Mg2+\frac{Na^+}{\sqrt{Ca^{2+} + Mg^{2+}}}Ca2++Mg2+​Na+​​​

​Ca2++Mg2+Na+\frac{Ca^{2+} + Mg^{2+}}{Na^{+}}Na+Ca2++Mg2+​​​

​Na++Mg2+Ca2++Mg2+\frac{Na^{+} + Mg^{2+}}{\sqrt{Ca^{2+} + Mg^{2+}}}Ca2++Mg2+​Na++Mg2+​​​

Correct option is A

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Sodium Adsorption Ratio can be expressed as
$SAR = \frac{Na^{+}}{\sqrt{\frac{Ca^{2+} + Mg^{2+}}{2}}}$

$\frac{Na^+}{\sqrt{\frac{Ca^{2+}+Mg^{2+}}{2}}}$

$\frac{Na^+}{\sqrt{Ca^{2+} + Mg^{2+}}}$

$\frac{Ca^{2+} + Mg^{2+}}{Na^{+}}$

$\frac{Na^{+} + Mg^{2+}}{\sqrt{Ca^{2+} + Mg^{2+}}}$