|Title||Soil carbon dynamics and potential carbon sequestration by rangelands|
|Publication Type||Journal Article|
|Year of Publication||2002|
|Authors||Schuman G.E., Janzen H.H., Herrick JE|
|Date Published||March 1, 2002|
|ARIS Log Number||120375|
|Keywords||carbon,soil, journal, journals, sequestration, carbon, soil|
The U.S. has about 336 Mha of grazing lands of which rangelands account for 48%. Changes in rangeland soil C can occur in response to a wide range of management and environmental factors. Grazing, fire, and fertilization have shown to affect soil C storage in rangelands, as has converting marginal cropslands into grasslands. While losses due to soil erosion can influence soil C storage on rangelands, most important is the effect of erosion on soil C redistribution on the landscape through detachment and subsequent deposition. Proper grazing management has been estimated to increase soil C storage on rangelands from 0.1 to 0.3 Mg C ha- yr-1 and new grasslands have been shown to store as much as 0.6 Mg C ha-1 yr-1. Grazing lands are estimated to contain 10-30% of the world's soil organic carbon. Given the size of the C pool in grazing lands we need to better understand the current and potential effects of management on soil C storage.