Which one of the following is the largest component of the soil system ?
[amp_mcq option1=”Living organisms” option2=”Mineral matters” option3=”Soil solution” option4=”Soil organic matter” correct=”option2″]
This question was previously asked in
UPSC CISF-AC-EXE – 2018
The correct option is B) Mineral matters.
In a typical mineral soil composition by volume, mineral particles (sand, silt, clay) constitute the largest proportion, usually around 45-50%. Soil solution (water) and soil air each occupy roughly 20-30% of the volume, depending on moisture content. Soil organic matter makes up a much smaller percentage, typically around 5% or less in mineral soils, while living organisms are present in very small quantities compared to the total volume.