Search National Agricultural Library Digital Collections

NALDC Record Details:

Greenhouse gas contributions and mitigation potential of agriculture in the central USA

Permanent URL:
http://handle.nal.usda.gov/10113/155
File:
Download [PDF File]
Abstract:
The central USA contains some of the most productive agricultural land of the world. Due to the high proportion of land area committed to crops and pasture in this region, the carbon (C) stored and greenhouse gas (GHG) emission due to agriculture represent a large percentage of the total for the USA. Our objective was to summarize potential soil organic C (SOC) sequestration and GHG emission from this region and identify how tillage and cropping system interact to modify these processes. Conservation tillage (CST), including no-tillage (NT), has become more widespread in the region abating erosion and loss of organic rich topsoil and sequestering SOC. The rate of SOC storage in NT compared to conventional tillage (CT) has been significant, but variable, averaging 0.40 ± 0.61 Mg C ha-1 year-1 (44 treatment pairs). Conversion of previous cropland to grass with the conservation reserve program increased SOC sequestration by 0.56 ± 0.60 Mg C ha-1 year-1 (five treatment pairs). The relatively few data on GHG emission from cropland and managed grazing land in the central USA suggests a need for more research to better understand the interactions of tillage, cropping system and fertilization on SOC sequestration and GHG emission.
Author(s):
Johnson, J.M.F. , Reicosky, D.C. , Allmaras, R.R. , Sauer, T.J. , Venterea, R.T. , Dell, C.J.
Subject(s):
greenhouse gases , gas emissions , carbon sequestration , land use , tillage , agricultural management , literature reviews , soil organic carbon , Midwestern United States
Format:
p. 73-94.
Note:
In the special issue: Greenhouse gas contributions and mitigation potential in agricultural regions of North America / edited by A.J. Franzluebbers and R.F. Follett.
Source:
Soil & tillage research 2005 Aug., v. 83, issue 1
Language:
English
Year:
2005
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.