Silica-sesquioxide ratio is useful in the evaluation of soil in respect of

A. Nutrient availability

B. Iron and aluminum content

C. Silicon content

D. None of the above

Answer: Option B

Solution(By Examveda Team)

Silica-sesquioxide ratio is useful in the evaluation of soil in respect of Iron and aluminum content.
The usefulness of silica-sesquioxide ratios in the characterization of clay soil was studied by comparative analysis of primary and secondary minerals and clays isolated from the selected temperate region and tropical soils.