Summary
The USDA NRCS Comprehensive Assessment of Soil Health (CASH) framework is a guidance document establishing a structured, multi-indicator approach to evaluating soil health on agricultural land. It integrates biological, chemical, and physical measurements into a composite scoring system designed to reflect overall soil function and its capacity to support crop production and ecosystem services. The framework is intended to provide practitioners and advisers with a consistent, evidence-informed methodology for monitoring changes in soil health over time and in response to management interventions.
UK applicability
The CASH framework was developed specifically for United States agricultural conditions under USDA NRCS, and its indicator thresholds and scoring criteria may not translate directly to UK soils, climate, or regulatory contexts. However, the multi-indicator methodological approach has broad relevance and may inform UK soil health monitoring initiatives such as those developed by AHDB, Rothamsted Research, or emerging Environmental Land Management scheme requirements.
Key measures
Soil biological indicators (e.g. microbial biomass, respiration, active carbon); chemical indicators (e.g. pH, organic matter, nutrient availability); physical indicators (e.g. aggregate stability, bulk density, infiltration rate)
Outcomes reported
The framework sets out a standardised set of biological, chemical, and physical soil health indicators intended to assess and monitor soil function across agricultural systems. It provides guidance on sampling protocols, scoring methods, and interpretation of results to support land management decisions.
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