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The use of computer modelling to evaluate the agronomic, economic and environmental impacts of N management in contrasting organic rotations Organic Eprints
Rayns, Francis; Schmutz, Ulrich; Firth, Chris; Thorup-Kristensen, Kristian; Zhang, Kefeng; Rahn, Clive.
A new computer model (EU-ROTATE_N) has been developed with the aim of improving nitrogen management on all farms across Europe which include fi eld vegetables in their rotations. It brings together aspects of many existing models and contains a number of features to make it applicable to organic producers (e.g. taking account of nitrogen fixation by legume containing leys, nitrogen conservation by winter cover crops and nitrogen supply by manures and composts). A key feature is the model’s ability to simulate economic output and this enables it to be of value to policy makers when considering the impact of new measures to reduce environmental pollution. This paper describes the model and some initial work that has been conducted to evaluate it under UK...
Tipo: Conference paper, poster, etc. Palavras-chave: Farm nutrient management; Vegetables; Farm economics.
Ano: 2006 URL: http://orgprints.org/10215/1/10215.pdf
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Can N Use and Farm Income be Optimized for Organic Field Vegetable Rotations in Europe? Organic Eprints
Schmutz, Ulrich; Firth, Chris; Rayns, Francis; Rahn, Clive.
Most fresh organic vegetables are produced in intensive rotations, which rely heavily on large inputs of nitrogen to maintain the yield and quality of produce demanded by customers. Field vegetable crops often use nitrogen inefficiently and may leave large residues of nitrogen in the soil after harvest, which can lead to damage to soil, water and air quality. The four-year project EU-ROTATE_N "Development of a model-based decision support system to optimize nitrogen use in horticultural crops rotations across Europe" aims to reduce some of these problems. The project, led by HRI Wellesbourne, started in January 2003 and involves seven research organizations from countries in northern, central and southern Europe. Work includes the evaluation of the effects...
Tipo: Journal paper Palavras-chave: Vegetables.
Ano: 2004 URL: http://orgprints.org/4792/1/4792.pdf
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