Henry Doubleday Research Association HDRA

Coventry, United Kingdom

Henry Doubleday Research Association HDRA

Coventry, United Kingdom
SEARCH FILTERS
Time filter
Source Type

Rahn C.R.,University of Warwick | Zhang K.,University of Warwick | Lillywhite R.,University of Warwick | Ramos C.,Instituto Valenciano Of Investigaciones Agrarias Ivia | And 13 more authors.
European Journal of Horticultural Science | Year: 2010

A model has been developed which assesses the economic and environmental performance of crop rotations, in both conventional and organic cropping, for over 70 arable and horticultural crops, and a wide range of growing conditions in Europe. The model, though originally based on the N_ABLE model, has been completely rewritten and contains new routines to simulate root development, the mineralisation and release of nitrogen (N) from soil organic matter and crop residues, and water dynamics in soil. New routines have been added to estimate the effects of sub-optimal rates of N and spacing on the marketable outputs and gross margins. The model provides a mechanism for generating scenarios to represent a range of differing crop and fertiliser management strategies which can be used to evaluate their effects on yield, gross margin and losses of nitrogen through leaching. Such testing has revealed that nitrogen management can be improved and that there is potential to increase gross margins whilst reducing nitrogen losses. © Verlag Eugen Ulmer KG, Stuttgart.


Rahn C.R.,University of Warwick | Zhang K.,University of Warwick | Lillywhite R.,University of Warwick | Ramos C.,Instituto Valenciano Of Investigaciones Agrarias Ivia | And 14 more authors.
Acta Horticulturae | Year: 2010

A new model EU-ROTATE-N has been written which enables the assessment of the economic and environmental performance of nitrogen applied to crop rotations in either conventional or organic cropping for a wide range of crops and growing conditions in Europe. The model can simulate root development, the mineralization and release of N from soil organic matter and crop residues, the effect of freezing conditions, and water movement. New routines have also been added to estimate the effects of suboptimal rates of N and spacing on the marketable outputs and gross margins. Model performance was tested against experimental results and broadly simulated the patterns of crop growth, N response and N losses. The model provides a mechanism for comparing the relative effects of differing cropping and fertilisation practices on yield gross margin and losses of nitrogen through leaching. The running of a number of scenarios has demonstrated that nitrogen management in field vegetable rotations can be improved in Europe by following at least Good Agricultural Practice. The model also provides the potential for suggesting improvements which have a minimal effect on gross margin whilst reducing nitrogen losses.

Loading Henry Doubleday Research Association HDRA collaborators
Loading Henry Doubleday Research Association HDRA collaborators