• degraded soils
• forest soils
• gley soils
• calcareous soils
• fertile soils
• brown soil
• irrigated soils
• skeletal soils
• uncultivated soils
• black soil
• acid soils
• water-logged soils
• clay soils
• peat
• compacted soils
• reclaimed soils
• saline soils
• sandy soils
• podzols