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
                                            Lenssen, Andrewitem
                                            Sainju, Upendraitem
                                            Caesar, Thecanitem
                                            Jabro, Jalal

                                                         - *Jay*item
                                            Allen, Brett
  Submitted to: Abstract of Agronomy Meetings
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 4/15/2009
                                    Publication  Date: 11/3/2009
                                    Citation: Lenssen, A.W., Sainju, U.M., Caesar, T., Jabro, J.D., Allen, B.L. 2009. Yield and Yield Components of Spring Wheat and Field Pea in Diversified Dryland Cropping Systems. Abstract of Agronomy Meetings. Paper No.54558.Interpretive Summary:
                                Technical Abstract: Available water, decreased soil quality, weed competition and plant diseases constrain dryland crop production in the northern Great Plains.  We initiated a field trial in 2004 comparing four crop rotations, with each component in a two-by-two matrix of tillage (conventional vs. zero tillage) and management (conventional vs. ecological) systems.  Rotations are continuous spring wheat (SW), SW-pea, SW-barley hay-pea, and SW-barley hay-corn-pea.  Ecological management practices vary by crop and are designed to improve competitiveness with weeds and snow capture.  After four years, the main effects of rotation and management system were significant for grain yield of SW and pea.  SW grain yield was greater in the two-year rotation with pea compared to continuous SW, but additional yield was not gained by planting SW every third or fourth year.  Continuous SW had the lowest reproductive tiller density.  Pea yield was 350 kg ha-1 greater following barley or corn than spring wheat, primarily due to more pods m-2.   Tillage system did not influence yield parameters of SW or pea.  Conversely, corn yield was 565 kg ha-1 greater under zero- than conventional tillage.  Results from the first 4-year cycle of this long-term study document that diversified rotations improve spring wheat and pea yield, in part by increasing pod and reproductive tiller densities.


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