Summary: 820 SSSAJ: Volume 71: Number 3 · May­June 2007
Soil Sci. Soc. Am. J. 71:820­828
doi:10.2136/sssaj2006.0303
Received 29 Aug. 2006.
*Corresponding author (rebecca.mcculley@uky.edu).
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Soil respiration is the total efflux of CO2 produced from soil
metabolic processes (Lundegardh, 1927), mainly micro-
bial decomposition of soil organic matter and root respiration
(Singh and Gupta, 1977). Thus, the abiotic and biotic factors
that influence microbial growth and activity and plant C alloca-
tion to roots exert significant control over SR rates (Hibbard et
al., 2005). Numerous studies have shown that climatic factors,

Source: Archer, Steven R. - Savanna/Woodland Ecology Lab., School of Natural Resources and the Environment, University of Arizona
Boutton, Thomas W. - Department of Ecosystem Science and Management, Texas A&M University

Collections: Environmental Sciences and Ecology