Výsledky vyhledávání - "N. J. Bradbury"

Modelling the fate of nitrogen in crop and soil in the years following application of 15N-labelled fertilizer to winter wheat

Autor: D. S. Jenkinson, Andrew P. Whitmore, N. J. Bradbury, P. B. S. Hart

Publikováno v: The Journal of Agricultural Science 121 (1993) 3

SUMMARYA computer model is presented that describes the flow of nitrogen between crop and soil on the field scale. The model has a compartmental structure and runs on a weekly time-step. Nitrogen enters via atmospheric deposition and by application o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4e46e1c98ea4f36c49a11aec5157a28
https://doi.org/10.1017/s0021859600085567

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Nitrogen deposition and its contribution to nitrogen cycling and associated soil processes

Autor: N. J. Bailey, T. W. Willison, N. J. Bradbury, P.R. Hargreaves, Keith Goulding, Paul R. Poulton, M. T. Howe, Daniel Murphy

Human activity has greatly perturbed the nitrogen cycle through increased fixation by legumes, by energy and fertilizer production, and by the mobilization of N from long-term storage pools. This extra reactive N is readily transported through the en

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https://repository.rothamsted.ac.uk/download/7c8e84b63426e165b78e1da21ed8069b1d33cf36fce97fe2bf02e3cb4259cb56/3728582/GOULDING_et_al-1998-New_Phytologist.pdf

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SUNDIAL: a PC-based system for simulating nitrogen dynamics in arable land

Autor: N. J. Bradbury, T. M. Addiscott, Jo Smith

SUNDIAL (SimUlation of Nitrogen Dynamics In Arable Land) is a user-friendly, PC-based version of the Rothamsted Nitrogen Turnover Model. It comprises a menu-driven system that allows agricultural advisers, even with minimal computing experience, to e

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The Potential Impact of Global Environmental Change on Nitrogen Dynamics in Arable Systems

Autor: David S. Powlson, N. J. Bradbury

Publikováno v: Soil Responses to Climate Change ISBN: 9783642792205

The response of nitrogen cycle processes to anticipated changes in climate will depend both on the direct effects of these changes (e.g. increased temperature, changes in rainfall amount and distribution, increased atmospheric CO2) and on indirect ef

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8acf96f4fb7022ba35fd1c1f5c48cb63
https://doi.org/10.1007/978-3-642-79218-2_9

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Demonstration of Sundial: Simulation of Nitrogen Dynamics in Arable Land

Autor: J. U. Smith, N. J. Bradbury

Publikováno v: Soil Responses to Climate Change ISBN: 9783642792205

SUNDIAL is a user-friendly PC-based version of the Rothamsted Nitrogen Turnover model (Bradbury et al., 1993). It is a dynamic model, describing the turnover of nitrogen and carbon in the soil crop system: inputs from fertilisers, organic manures, th

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https://doi.org/10.1007/978-3-642-79218-2_24

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Potential contribution of ploughed grassland to nitrate leaching

Autor: Andrew P. Whitmore, P.A. Johnson, N. J. Bradbury

An exponential decline was fitted to measured losses of organic nitrogen from grass soils during the 25 years after ploughing. The experiments were carried out on soils of the Romney and Blacktoft series from the Holland district of Lincolnshire. The

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Simulation of nitrogen in soil and winter wheat crops: modelling nitrogen turnover through organic matter

Autor: Kevin Coleman, T. M. Addiscott, Andrew P. Whitmore, N. J. Bradbury

Publikováno v: Nitrogen Turnover in the Soil-Crop System ISBN: 9789401055185

A computer model is described that simulates leaching, organic matter turnover and nitrogen uptake by a winter wheat crop. The model is assessed against a data set from the Netherlands where winter wheat was grown in two seasons (1982–1983 and 1983

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c2126237933e9dedbfb95474a497092
https://doi.org/10.1007/978-94-011-3434-7_13

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Constructing a nitrogen fertilizer recommendation system using a dynamic model: what do farmers want?

Publikováno v: ResearcherID

An effective fertilizer recommendation system requires information on seasonal, soil-related and cultural variations in soil mineral nitrogen (N) and nutrient requirements of the crop. This can be provided by dynamic N turnover models, such as listed

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http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000071627800009&KeyUID=WOS:000071627800009

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Ability of the SUNDIAL model to simulate the short-term dynamics of 15N applied to winter wheat and oilseed rape

Autor: G. Tuck, Benoit Gabrielle, N. J. Bradbury, Bernard Nicolardot, Sylvie Recous

Publikováno v: Scopus-Elsevier
Journal of Agricultural Science
Journal of Agricultural Science, Cambridge University Press (CUP), 2001, 137, pp.157-168. ⟨10.1017/S0021859601001241⟩

Labelling using the stable 15 isotope of nitrogen allows a close monitoring of the fate of the fertilizer applied to arable crops. Because 15N data give direct estimates of nitrogen transformation rates, they also provide more stringent tests for N m

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http://www.scopus.com/inward/record.url?eid=2-s2.0-0034822911&partnerID=MN8TOARS

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