|
|
|
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
|
