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Registros recuperados: 6
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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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Current use of peat, plastic and fertiliser inputs in organic horticultural and arable crops across Europe Organic Eprints
Løes, Anne-Kristin; Katsoulas, Nikolaos; Caceres, Rafaela; de Cara, Manuel; Cirvilleri, Gabriella; Kir, Alev; Knebel, Lucas; Malinska, Krystyna; Oudshoorn, Frank; Raskin, Ben; Rayns, Francis; Valleix, Sophie; Schmutz, Ulrich.
The use of contentious inputs linked to plant protection, and the use of peat, plastic and fertilisers used in growing have been mapped in selected organically produced crops in 10 countries across Europe. This report refers the output of this mapping. It shows that organic production has not come very far to phase out peat or plastic. The consumption of these materials seems to be quite comparable to non-organic production systems.The main utilisation of peat is for production of young plants (transplants). Most organic growers purchase plants e.g. for citrus, olives and grafted tomatoes and the growing media has usually a high content of peat. Vegetable transplants are also commonly produced by special growers. Peat is also used for casing layers for...
Tipo: Report Palavras-chave: Greenhouses and coverings Breeding; Genetics and propagation Weed management Farm nutrient management Evaluation of inputs.
Ano: 2018 URL: http://orgprints.org/34357/1/D5_1%20O%2B%20Current%20use%20of%20contentious%20inputs%20WP5%20SOIL.pdf
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Economic analysis of stockless, horticultural crop rotations on a model farm in temperate zone organic systems Organic Eprints
Schmutz, Ulrich; Firth, Chris; Rayns, Francis.
Research draws on an organic research farm site in central England with a temperate zone climate - fairly common for the northern lowlands of Europe. The soil type is a sandy loam with 591 mm rainfall. Detailed economic and agronomic data have been collected since conversion began in 1995. The economic analysis discusses rotational gross and net margins of more than 30 different rotations with different fertility building and vegetable crops (potatoes, cabbages, onions, carrots, leeks and parsnips). Sensitivity and risk analysis of key variable costs important for successful organic vegetable production are shown. Rotational gross margins varied from –570 €/ha to 6,341 €/ha. Highest output-risk was introduced by yield variations, not price variation....
Tipo: Conference paper, poster, etc. Palavras-chave: Farm economics.
Ano: 2005 URL: http://orgprints.org/4473/4/Schmutz_etal_4p_revised%2Ded.doc
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Sort Out Your Soil: A practical guide to green manures Organic Eprints
Rosenfeld, Anton; Rayns, Francis.
The booklet is a compendium of green manures species used in UK. The introduction explains the reasons why to grow green manures and the benefits they bring into the system. What follows is a guide to the choice of the species to use as green manure, with details per species (leguminous species and other species) and some comparative assessments among the species. It is focused on UK climate and farming systems but its contents can easily be used also in other temperate environments. The booklet is clear and has several photos. This tool can be used to adapt strategies for green manure to specific case.
Tipo: Practice tool Palavras-chave: Soil quality Soil Crop health; Quality; Protection Weed management Farm nutrient management.
Ano: 2021 URL: http://orgprints.org/30588/1/Sort%20Out%20Your%20Soil.pdf
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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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Trials in Organic Horticulture Organic Eprints
Koller, Martin; Rayns, Francis; Schmutz, Ulrich.
A pre-condition for trials concerning organic vegetable and fruit crops is the EU regulation 834/2007 on organic farming, or any other equivalent regulation in countries outside the EU. Inside the EU, in addition to the public (legally binding) EU standard, private standards of certification bodies defining organic or bio-dynamic production are also relevant. Research should always be conducted on well-established organic land (ideally converted for at least 5 years), and the history of conversion should be documented in the Materials and Methods section of any report (for research studying the process of conversion this is obviously not applicable). If the research involves methods and products which are currently not part of organic standards (public or...
Tipo: Book chapter Palavras-chave: "Organics" in general; Vegetables; Research methodology and philosophy.
Ano: 2016 URL: http://orgprints.org/30600/1/koller-etal-2016-BioGreenhouse_Research-chapter2-p13-22.pdf
Registros recuperados: 6
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