Which one of the following is the largest component of the soil system ?

Soil is a complex mixture of four primary components: mineral matter, organic matter, water, and air. According to standard soil science and NCERT textbooks, the approximate volumetric composition of a typical productive soil is:

• Mineral matters (45%): This is the largest component, consisting of inorganic materials like sand, silt, and clay derived from the weathering of parent rocks.
• Soil Solution/Water (25%): This fills the pore spaces and carries dissolved nutrients to plant roots.
• Soil Air (25%): This occupies the pore spaces not filled by water, providing oxygen for root respiration.
• Soil Organic Matter (5%): This includes humus, roots, and living organisms (which constitute only a tiny fraction of this 5%).

Since mineral matter accounts for nearly half of the soil's volume, it is the largest component. Options A, C, and D represent significantly smaller proportions of the soil system.