Estimating Nitrogen Availability of Heat-Dried Biosolids
As heat-dried biosolids become more widely produced and marketed, it is important to improve estimates of N availability from these materials. Objectives were to compare plant-available N among three different heat-dried biosolids and determine if current guidelines were adequate for estimating app...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2011/190731 |
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| author | Craig G. Cogger Andy I. Bary Elizabeth A. Myhre |
| author_facet | Craig G. Cogger Andy I. Bary Elizabeth A. Myhre |
| author_sort | Craig G. Cogger |
| collection | DOAJ |
| description | As heat-dried biosolids become more widely produced and marketed, it is important to improve estimates of N availability from these materials. Objectives were to compare plant-available N among three different heat-dried biosolids and determine if current guidelines were adequate for estimating application rates. Heat-dried biosolids were surface applied to tall fescue (Festuca arundinacea Schreb.) in Washington State, USA, and forage yield and N uptake measured for two growing seasons following application. Three rates of urea and a zero-N control were used to calculate N fertilizer efficiency regressions. Application year plant-available N (estimated as urea N equivalent) for two biosolids exceeded 60% of total N applied, while urea N equivalent for the third biosolids was 45%. Residual (second-year) urea N equivalent ranged from 5 to 10%. Guidelines for the Pacific Northwest USA recommend mineralization estimates of 35 to 40% for heat-dried biosolids, but this research shows that some heat-dried materials fall well above that range. |
| format | Article |
| id | doaj-art-fc354ef928654b93b86b76f54f81e8d0 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
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| series | Applied and Environmental Soil Science |
| spelling | doaj-art-fc354ef928654b93b86b76f54f81e8d02025-02-03T01:22:46ZengWileyApplied and Environmental Soil Science1687-76671687-76752011-01-01201110.1155/2011/190731190731Estimating Nitrogen Availability of Heat-Dried BiosolidsCraig G. Cogger0Andy I. Bary1Elizabeth A. Myhre2Washington State University Puyallup Research and Extension Center, 2606 W. Pioneer Ave Puyallup, WA 98371, USAWashington State University Puyallup Research and Extension Center, 2606 W. Pioneer Ave Puyallup, WA 98371, USAWashington State University Puyallup Research and Extension Center, 2606 W. Pioneer Ave Puyallup, WA 98371, USAAs heat-dried biosolids become more widely produced and marketed, it is important to improve estimates of N availability from these materials. Objectives were to compare plant-available N among three different heat-dried biosolids and determine if current guidelines were adequate for estimating application rates. Heat-dried biosolids were surface applied to tall fescue (Festuca arundinacea Schreb.) in Washington State, USA, and forage yield and N uptake measured for two growing seasons following application. Three rates of urea and a zero-N control were used to calculate N fertilizer efficiency regressions. Application year plant-available N (estimated as urea N equivalent) for two biosolids exceeded 60% of total N applied, while urea N equivalent for the third biosolids was 45%. Residual (second-year) urea N equivalent ranged from 5 to 10%. Guidelines for the Pacific Northwest USA recommend mineralization estimates of 35 to 40% for heat-dried biosolids, but this research shows that some heat-dried materials fall well above that range.http://dx.doi.org/10.1155/2011/190731 |
| spellingShingle | Craig G. Cogger Andy I. Bary Elizabeth A. Myhre Estimating Nitrogen Availability of Heat-Dried Biosolids Applied and Environmental Soil Science |
| title | Estimating Nitrogen Availability of Heat-Dried Biosolids |
| title_full | Estimating Nitrogen Availability of Heat-Dried Biosolids |
| title_fullStr | Estimating Nitrogen Availability of Heat-Dried Biosolids |
| title_full_unstemmed | Estimating Nitrogen Availability of Heat-Dried Biosolids |
| title_short | Estimating Nitrogen Availability of Heat-Dried Biosolids |
| title_sort | estimating nitrogen availability of heat dried biosolids |
| url | http://dx.doi.org/10.1155/2011/190731 |
| work_keys_str_mv | AT craiggcogger estimatingnitrogenavailabilityofheatdriedbiosolids AT andyibary estimatingnitrogenavailabilityofheatdriedbiosolids AT elizabethamyhre estimatingnitrogenavailabilityofheatdriedbiosolids |