Caliche soil is recognized by its:

• A. Ability to drain well.
• B. Abundance of humus.
• C. Tiny granules that promote deep water penetration.
• D. High alkaline content due to excess lime.

Answer: (D)

Caliche soil is defined by a cemented layer of calcium carbonate that forms as groundwater moves upward and lime precipitates with evaporation, creating a surface that is highly alkaline. That high pH from excess lime is the hallmark feature, which is why the statement about high alkaline content fits best.

Drainage tends to be adversely affected by the hard caliche layer, not well described by "drain well." So the other options don’t match caliche’s characteristics: it’s not notable for abundant humus, nor for tiny granules that promote deep water penetration.