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| Kelm, Dr. Michael; Loges, Dr. Ralf; Taube, Prof. Dr. Friedhelm. |
| Nutrient balances are important agri-environmental indicators, which describe the magnitude of potential nutrient losses from farming systems to the environment. In order to analyze production systems at the entire farm scale, nitrogen balances and other agri-environmental indicators were assessed on 32 organic and conventional farms in Northern Germany. On organic farms, nitrogen fixation of legumes was determined on representative fields. Irrespective of the specialization (all-arable farms, dairy farms), nitrogen surpluses were always pronouncedly lower on organic farms compared to conventional farms. Organic farms generally conducted a sustainable nutrient management. However, the total nitrogen supply at the farm scale was not sufficient on many... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2007 |
URL: http://orgprints.org/11004/1/231_9707_Kelm_N%2DBilanzen.pdf |
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| Kelm, Dr. Michael; Loges, Dr. Ralf; Taube, Prof. Dr. Friedhelm. |
| Nutrient management is a key factor for both economic viability and environmental performance of farming systems. On 32 representative conventional and organic farms in Northern Germany, nutrient management was analyzed in the interdisciplinary monitoring project “COMPASS”. Organic farms had significantly lower nitrogen (N) surpluses compared with conventional farms. The majority of organic farms had very low or even negative N surpluses, indicating insufficient N supply in the cropping system. Nitrogen leaching, however, was too high in many cases on both conventional and organic farms. Strategies for a more targeted nutrient supply in organic farming need to be developed and implemented. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/11679/1/11679.pdf |
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