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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Set A (Scientist)	Set B (Contribution)
[i] Thomas Way	[a] Borax
[ii] Thomas Graham	[b] Ammonium molybdate
[iii] Sorenson	[c] Copper sulphate
[iv] Schofield	[d] Zinc sulphate

Set A	Set B
[i] Robinson	[a] Pipette method
[ii] Yoder	[b] Wet sieving
[iii] Munsell	[c] Colour chart
[iv] Atterberg	[d] Consistency limits

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

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

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

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

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