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dc.contributor.authorRyan, Michael*
dc.date.accessioned2017-07-24T11:57:16Z
dc.date.available2017-07-24T11:57:16Z
dc.date.issued1998-09-01
dc.identifier.citationRyan, M., Better management and economy of the N resource in Grassland:Relative denitrification rates in surface and subsurface mineral soil layers , End of Project Reports, Teagasc, 1998.en_GB
dc.identifier.isbn1901138852
dc.identifier.urihttp://hdl.handle.net/11019/1210
dc.descriptionEnd of Project Reporten_GB
dc.description.abstractThe project, which was carried out at Johnstown Castle, was concerned with measuring denitrification at depth in grazed grass plots receiving 362 kg fertiliser N per ha. Reports in the scientific literature had indicated that such was likely, given the conditions necessary for the denitrifying microbial reactions to take place. In one experiment, denitrification was detected in measurable amounts to 90cm soil depth in spring-summer, using the acetylene block technique. A second more extensive experiment carried out under similar conditions within one year from March to August and from October to March looked at denitrification in greater detail to 50 cm deep. Results showed the importance of soil water and soil ammonium (NH4) to rate of denitrification. The rate was much greater in the 0-10 cm layer than in the lower layers in both time periods. Of the total denitrification occurring in the 0-50 cm layers in the year, which was 16.6 kg N per ha, 80% occurred at 0-10 cm with 62% occurring in the second time period, October to March.en_GB
dc.description.sponsorshipEuropean Structural Funding (EAGGF)en_GB
dc.language.isoenen_GB
dc.publisherTeagascen_GB
dc.relation.ispartofseriesEnd of Project Reports;
dc.subjectDenitirificationen_GB
dc.subjectsoil depthen_GB
dc.subjectsoil wateren_GB
dc.subjectsoil ammoniumen_GB
dc.titleBetter management and economy of the N resource in Ireland.en_GB
dc.typeTechnical Reporten_GB
dc.identifier.rmis3830
refterms.dateFOA2018-01-12T08:58:12Z


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