Spatial variability of soil organic carbon in grasslands: implications for detecting change at different scales
Conant, RT & Paustian, K (2002) Spatial variability of soil organic carbon in grasslands: implications for detecting change at different scales. Environmental Pollution, 116(Suppl.), S127-S135.
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Extensive data used to quantify broad soil C changes (without information about causation), coupled with intensive data used for attribution of changes to specific management practices, could form the basis of an efficient national grassland soil C monitoring network. Based on variability of extensive (USDA/NRCS pedon database) and intensive field-level soil C data, we evaluated the efficacy of future sample collection to detect changes in soil C in grasslands. Potential soil C changes at a range of spatial scales related to changes in grassland management can be verified (alpha=0.1) after 5 years with collection of 34, 224, 501 samples at the county, state, or national scales, respectively. Farm-level analysis indicates that equivalent numbers of cores and distinct groups of cores (microplots) results in lowest soil C coefficients of variation for a variety of ecosystems. Our results suggest that grassland soil C changes can be precisely quantified using current technology at scales ranging from farms to the entire nation. (C) 2001 Elsevier Science Ltd. All rights reserved.
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|Item Type:||Journal Article|
|Additional Information:||Advances in Terrestrial Ecosystem: Carbon Inventory, Measurements, and Monitoring Conference, RALEIGH, NC, OCT 03-05, 2000|
|Keywords:||Soil carbon; Grasslands; USDA/NRCS pedon database; Soil sampling; Spatial variability|
|Subjects:||Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ECOLOGY (060200)|
|Divisions:||Past > Institutes > Institute for Sustainable Resources|
|Deposited On:||07 Oct 2010 06:35|
|Last Modified:||07 Oct 2010 14:51|
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