Science · Soils
Calcisol
Soils with qualifying secondary carbonate accumulation, often in dry climates.
WRB Reference Soil Group
Profile
- Diagnostic
- Calcic or petrocalcic features within WRB depth criteria
- Chemistry
- Carbonate accumulation is not synonymous with salinity
- Restriction
- Cemented petrocalcic layers can impede roots
- Texture
- Variable mineral texture
Water & soil targets
- Moisture (VWC)
- Site-calibrated; measure field capacity and dry-down
- Salinity tolerance
- Not inferable from soil classification; test EC, sodicity and water chemistry
- Drought tolerance
- Not inferable from taxonomy; measure accessible storage and plant response
Soil orders and WRB groups are not textures. Determine horizon-specific retention, field capacity, drainage, rooting depth and seasonal hydrology before setting irrigation triggers.
Problems to watch
- Iron chlorosis
- Cemented-layer restriction
- Salt buildup under poor irrigation
Stress signs
- Yellow young leaves
- Abrupt root termination
- Surface salt deposits
Where you'll find it
- Calcareous landscape planning
- Irrigation feasibility review
More soils
All Science profilesGeneral agronomic guidance and typical ranges; actual targets vary by site, soil, climate and season.