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dc.contributor.authorDrecht G van
dc.contributor.authorGoossensen FR
dc.contributor.authorHack-ten Broeke MJD
dc.contributor.authorJansen EJ
dc.contributor.authorSteenvoorden JHAM
dc.date.accessioned2012-12-12T18:14:03Z
dc.date.available2012-12-12T18:14:03Z
dc.date.issued1991-11-30
dc.identifier724901003
dc.identifier.urihttp://hdl.handle.net/10029/259179
dc.description.abstractAbstract niet beschikbaar
dc.description.abstractNine steady state nitrate leaching models have been tested. Predicted annual leaching rates have been compared with measured nitrate leaching of field experiments both statistically and visually (double mass). Five models give satisfactory results for grassland on sandy soil. No sufficient data are available to test the models for grassland on clayey soil. None of the teted models can predict the measured nitrate leaching from silage maize fields on sandy soil satisfactorily. All tested models underestimate the measured nitrate leaching rates from silge maize fields. This can be explained by the high mineralization rates of organic N in these fields that probably have contributed to the nitrate leaching. Scenario studies have been carried out for cut and grazed grassland, silage maize and arable land (crop rotation). In a situation of cut grassland on well drained sandy soil and a N-fertilization level of 400 kg.ha-1.a-1, five models, that gave satisfactory results in the test, show a wide range of computed nitrate leaching rates 953 to 172 kg.ha-1.a-1). However most models compute the same reduction of about 50% of nitrate leaching rates if the N-fertilization level is decreased to 300 kg. ha-1.a-1 and slurry is applied in spring by the method of injection instead of spreading.
dc.description.sponsorshipLNV VROM VW
dc.format.extent85 p
dc.language.isonl
dc.relation.ispartofRIVM Rapport 724901003
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/724901003.html
dc.subject13nl
dc.subject91-4nl
dc.subjectstikstofnl
dc.subjectmestnl
dc.subjectkunstmestnl
dc.subjectlandbouwnl
dc.subjecteg-drinkwaternormnl
dc.subjectvalidatie; nitrogennl
dc.subjectmanurenl
dc.subjectfertilizernl
dc.subjectagriculturenl
dc.subjectec drinkingwater standard; validationnl
dc.titleBerekening van de nitraatuitspoeling naar het grondwater met behulp van eenvoudige modellennl
dc.title.alternativeComputation of nitrate leaching to groundwater, using simple modelsen
dc.typeReport
dc.date.updated2012-12-12T18:14:04Z
html.description.abstractAbstract niet beschikbaar
html.description.abstractNine steady state nitrate leaching models have been tested. Predicted annual leaching rates have been compared with measured nitrate leaching of field experiments both statistically and visually (double mass). Five models give satisfactory results for grassland on sandy soil. No sufficient data are available to test the models for grassland on clayey soil. None of the teted models can predict the measured nitrate leaching from silage maize fields on sandy soil satisfactorily. All tested models underestimate the measured nitrate leaching rates from silge maize fields. This can be explained by the high mineralization rates of organic N in these fields that probably have contributed to the nitrate leaching. Scenario studies have been carried out for cut and grazed grassland, silage maize and arable land (crop rotation). In a situation of cut grassland on well drained sandy soil and a N-fertilization level of 400 kg.ha-1.a-1, five models, that gave satisfactory results in the test, show a wide range of computed nitrate leaching rates 953 to 172 kg.ha-1.a-1). However most models compute the same reduction of about 50% of nitrate leaching rates if the N-fertilization level is decreased to 300 kg. ha-1.a-1 and slurry is applied in spring by the method of injection instead of spreading.


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