1. A type of soil with a light-colored, leached upper layer overlying a dense, clay-rich layer, typically found in poorly drained areas with seasonal waterlogging.
Usage: soil science; technical term

Examples

• Planosol soils are common in flat, low-lying regions with restricted drainage.
• The farmer's field contained planosol, which required improved drainage systems.
• Planosol formation occurs when water accumulates above an impermeable clay layer.
• Scientists classified the soil sample as planosol based on its distinctive layering.
• Planosol soils often support specialized vegetation adapted to wet conditions.