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dc.contributor.authorHauser, S.
dc.date.accessioned2019-12-04T11:31:12Z
dc.date.available2019-12-04T11:31:12Z
dc.date.issued1992
dc.identifier.citationHauser, S. (1992). Estimation of symbiotically fixed nitrogen using extended N difference methods. Biological nitrogen fixation and sustainability of tropical agriculture. Ibadan, Nigeria, 24-28 September 1990. Ibadan, Nigeria: IITA, (p.309-321).
dc.identifier.isbn0-471-98560-3
dc.identifier.urihttps://hdl.handle.net/20.500.12478/5465
dc.description.abstractThere are limitation to all methods currently available for estimating symbiotically fixed nitrogen. This paper evaluates the I5N dilution and N difference methods, and reports on the results of field experiments conducted with faba beans (Viciafaha) and peas (Pisum sativum). The objectives of these experiments were to investigate whether the limitations of the N difference method, hitherto the least-used method, could be overcome, to study the effect of extending the simple N difference method, and to compare the preconditions of this extended method with those of the I5N dilution method. The extension of the N difference method from using only shoot nitrogen to include consideration of nitrogen in litter fall, roots and nodules increased the estimates of fixed nitrogen by 2 1 kg/ha (11%) for faba beans. Additional consideration of nitrate-N in the soil increased estimates of fixed nitrogen by 40 kg/ha (21%) for faba beans and by 33 kg/ha (18%) for peas. A comparison between the preconditions for the extended N difference method and the I5N dilution method showed them to be the same.
dc.description.sponsorshipDeutsche Forschungsgemeinschaft
dc.language.isoen
dc.subjectNitrogen
dc.subjectFaba Beans
dc.titleEstimation of symbiotically fixed nitrogen using extended N difference methods
dc.typeConference Paper
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAcp
cg.coverage.regionEurope
cg.coverage.countryGermany
cg.authorship.typesCGIAR single centre
cg.iitasubjectSoil Fertility
cg.iitasubjectGrain Legumes
cg.accessibilitystatusOpen Access
local.dspaceid103822


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