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
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home 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
                                            Sikora, Lawrenceitem
                                            Adler, Paul
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/1/2000
                                    Publication  Date: 11/5/2000
                                    Citation: Sikora, L.J., Adler, P.R. 2000. Phosphorus availability changes with poultry compost age. 2000 ASA, CSSA, SSSA Annual Meeting, November 5-9, 2000, Minneapolis, MN.Interpretive Summary: .
                                Technical Abstract: Manure application may alter the availability of the soil nutrients by stimulating biological activity and mineralization.  Composting stabilizes manures so that biological activity of the compost is less than the manure.  To test if the compost process alters the availability of P, a field-laboratory study was conducted which  followed the water- and Mehlich 1-P extractable levels in soils amended with poultry manure composts of different age or maturities. Composting was performed over 8 weeks using poultry manure- woodchips-straw mixture and the windrow composting method.  Samples were taken at 0, 2, 4, and 8 weeks and tested for stability using the self-heating test.  Samples were added to two soils, a clay and a silt, containing high and low extractable levels of P and incubated at room temperature for 8 weeks.  Data indicated that  extractable P levels of amended soils increased form 0 to 2 weeks of composting and declined thereafter to 8 weeks.  Soil type did not affect these results.  These results indicated that composting causes the release of inorganic P from organic forms resulting in the peak at two weeks.  Amending soils with immature or insufficiently stabilized composts may result in potentially higher P concentrations in runoff.


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