the physical appearance of soil as indicated by the arrangement of individual particle is known as

Answer Details

The physical appearance of soil as determined by the arrangement of individual soil particles into aggregates or clumps is called soil structure. Soil structure describes how sand, silt, and clay particles are grouped together into larger units called peds or aggregates, and the pattern of pore spaces between them.

Common soil structure types include granular (rounded aggregates, common in topsoil), blocky (angular or sub-angular blocks), prismatic (vertical columns), platy (horizontal plates), and single-grained or massive (no aggregation).

The other terms refer to different soil properties:

• Soil texture refers to the relative proportions of sand, silt, and clay particles in a soil sample - it describes particle size distribution, not how those particles are arranged.
• Capillarity is the ability of water to move upward through narrow pore spaces in the soil against gravity. It is a property related to water movement, not the arrangement of particles.
• Soil type is a general classification term and does not specifically describe the arrangement of particles.

Exam tip: Texture = what sizes of particles are present; Structure = how those particles are arranged. Both affect water retention, aeration, and root penetration, but they describe different physical attributes of the soil.