Editing Agriculture — Agricultural Soils Emissions (section)

== Monitoring and Measurement ==
Measurement of agricultural soils emissions involves direct and indirect methods. Direct flux measurements typically use chamber techniques placed on soil surfaces to capture nitrous oxide emissions over time. These chambers can be static or dynamic and provide high temporal resolution data at specific locations. Indirect methods include eddy covariance towers that measure gas exchange over larger areas, and remote sensing combined with modeling approaches to estimate emissions at regional to global scales. Monitoring institutions such as the United States Geological Survey ([https://en.wikipedia.org/wiki/United_States_Geological_Survey USGS]), the National Oceanic and Atmospheric Administration ([https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospheric_Administration NOAA]), and various research organizations contribute data to improve understanding of emissions. Standardized protocols and calibration procedures are important for ensuring data comparability across studies.

Within the SIGNAL system, agricultural soils emissions are treated as a defined environmental signal whose boundaries and measurement conventions are described below.