<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Schuman, G.E.</style></author><author><style face="normal" font="default" size="100%">Herrick, J.E.</style></author><author><style face="normal" font="default" size="100%">Janzen, H.H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Dynamics of Soil Carbon in Rangelands</style></title><secondary-title><style face="normal" font="default" size="100%">Carbon Sequestration Potential of U.S. Grazing Lands</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">C storage</style></keyword><keyword><style  face="normal" font="default" size="100%">grazing strategies</style></keyword><keyword><style  face="normal" font="default" size="100%">management</style></keyword><keyword><style  face="normal" font="default" size="100%">rangeland</style></keyword><keyword><style  face="normal" font="default" size="100%">sequestration</style></keyword><keyword><style  face="normal" font="default" size="100%">soil carbon</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2001</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2001</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">bibliography/01-073.pdf</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Ann Arbor Press</style></publisher><pub-location><style face="normal" font="default" size="100%">Chelsea, MI</style></pub-location><pages><style face="normal" font="default" size="100%">267-290</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Carbon dynamics of rangeland soils are very complex and only limited detailed research has been conducted to assess the role of management and grazing strategies on soil C changes and the potential for enhanced C sequestration. Soil erosion also can impact the soil C pools in rangeland ecosystems, but much of the erosion does not result in loss of C from the  landscape but rather a repositioning on the landscape. In an attempt to estimate the effects of management on the C storage potential of the rangeland ecosystems, we have reviewed the literature on the subject and made some assumptions in order to make some qualitative estimates of C sequestration potential and potential avoided losses of C through management. We believe about 19 Tg C yr-1 can be sequestered through management on lands that are in need of improved management and through soil C regeneration in CRP lands. However, we estimate that 44 Tg C yr-1  can be maintained through ensured good management and by preventing CRP lands from being brought back into crop production. The estimated 63 Tg C yr-1 that can be sequestered and/or prevented from being lost from well- managed rangelands and through maintenance of CRP lands may be small in comparison to the estimates of C sequestration by improved production prac- tices on croplands in the U.S.; however, this level of C storage in a natural ecosystem tends to be more stable and less prone to major C losses through erosional losses and shifts in management.</style></abstract><accession-num><style face="normal" font="default" size="100%">JRN2172</style></accession-num><notes><style face="normal" font="default" size="100%">ARIS entry by Rangeland Resources Research, Cheyenne, WY</style></notes><section><style face="normal" font="default" size="100%">11</style></section></record></records></xml>