Data collection ‐ ISCN4 database

The International Soil Carbon Network 4 (ISCN4) database targets geo-located layer-level soil carbon data. The purpose of this data collection is to inform soil carbon modeling and upscale mapping efforts by providing site level benchmarks.

Variables of interest for this collection include:

• latitude/longitude and associated datum
• observation year
• depth of the top and bottom of the layer from surface
• soil organic carbon fraction (any method)
• soil carbon density (any method)
• soil bulk density (any method)
• soil coarse fraction (any method)
• soil inorganic carbon fraction (any method)
• soil loss on ignition