Summary
Core Ideas Soil C and N measures are an integral component to soil health assessment. Active C and N were not sensitive to tillage and cropping intensity. We propose 7 criteria that will aid in selecting future soil health metrics. Permanganate oxidizable C scored the highest based on the 7 criteria. Monitoring soil health is an important component of any land management system that sustains soil resources. As metrics of soil health, we evaluated surface soil organic matter (SOM) properties from five field experiments ranging from 2 to 30 yr old and representing diverse agroecosystems across the inland Pacific Northwest (iPNW). The SOM properties measured included soil organic C (SOC), total N, acid nonhydrolyzable C (NHC), acid nonhydrolyzable N (NHN), acid-hydrolyzable C (HC), acid-hydro
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