U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Agricultural Systems Research: Sidney, MT
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    NPARL
                        NPARL
                                    Pest Management Research
                                    Grasshoppers: Their Biology, Identification and Management:Search small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area Sidney, Montana Northern Plains Agricultural Research Laboratory Agricultural Systems Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Sainju, Upendraitem
                                            Caesar, Thecanitem
                                            Lenssen, Andrewitem
                                            Evans, Robertitem
                                            Kolberg, Robert
  Submitted to: USDA Greenhouse Gas Symposium
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 11/20/2006
                                    Publication  Date: 2/6/2007
                                    Citation: Sainju, U.M., Caesar, T., Lenssen, A.W., Evans, R.G., Kolberg, R.L. 2007. Long-term tillage and cropping system effects on dryland soil carbon sequestration and fractions. Positioning Agriculture and Forestry to Meet the Challenges of Climate Change. In Fourth USDA Greenhouse Gas Conference. February 6-8, 2007. Baltimore, MD. p.38.Interpretive Summary:
                                Technical Abstract: Management practices are needed to increase dryland soil C sequestration for C trading to reduce greenhouse gas emission and C fractions to improve soil quality. We evaluated the 21-yr effect of a combination of tillage frequency and cropping intensity [No-till continuous spring wheat (NTCW), spring till continuous spring wheat (STCW), fall and spring till continuous spring wheat (FSTCW), fall and spring till wheat-pea/barley (FSTW-P/B), and spring-till spring wheat-fallow (STW-F)] on soil surface residue C and soil C fractions in 2004 in eastern Montana. Mean annualized straw C returned to the soil from 1984 to 2004 was lower in STW-F than in other treatments. As a result, surface residue C was also lower in STWF than in NTCW and FSTCW. Soil inorganic (SIC) and organic (SOC) C, particulate organic C (POC), and potential C mineralization (PCM) at the 0 to 5 cm depth were higher in NTCW, STCW, and FSTCW than in STW-F. At 5 to 20 cm, SOC and POC were higher in NTCW and STCW than in STW-F, and PCM was higher in STCW and FSTW-P/B than in STW-F. No-tillage increased annualized straw C, SIC, SOC, and PCM at 0 to 5 cm, and POC at 0 to 5 and 5 to 20 cm compared with tillage. Similarly, continuous cropping increased annualized straw C, residue C, SIC at 0 to 5 cm, and SOC, POC, and PCM at 0 to 5 and 5 to 20 cm compared with crop-fallow. Reduced tillage and increased cropping intensity increased dryland C input, C storage in soil and residue, and C fractions that help to increase C sequestration and soil quality.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov