Developing a Long-Term Monitoring Network for Monitoring Soil Carbon Stocks in the U.S (original) (raw)

Abstract

Monitoring carbon pools is important for evaluating modeled results, particularly for the slower dynamics of soil C pools. Thus, a national, long-term soil monitoring network is being established on cropland and grazing lands in the U.S. Data from this network will serve as an independent evaluation for model-based estimates of soil carbon stocks. The soil monitoring network will consist of permanently marked sample sites associated with the USDA-NRCS Natural Resource Inventory (NRI), with an anticipated resampling frequency of 5-10 years. Sample stratification has been designed to minimize variance associated with soil carbon stock changes for similar land use and climate-soil combinations, with strata largely based on the USDA's Major Land Resource Areas (MLRA). The national sample has been distributed to minimize the standard error of prediction based on a Neyman Allocation, with goal of detecting soil carbon stock changes at regional and national scales over 5-10 year time p...

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