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| Burgt, Geert-Jan H.M.; Eekeren, N. van; Scholberg, Johannes; Koopmans, Chris. |
| On-farm nitrogen fixation is a driving force in organic agriculture. The efficiency with which this nitrogen is used can be increased by using lucerne (Medicago sativa) or grass-clover directly as sources of fertilizer on arable land: cut-and-carry fertilizers. In two arable crops, the use of lucerne and grass-clover as fertilizers was compared with the use of poultry manure and slurry. The nitrogen-use efficiency at crop level was comparable or better for the cut-andcarry fertilizers as compared to the animal manures. The relative P and K content of these fertilizers came closer to the crop demand than that of the poultry manure. Crop yields were comparable or better when using lucerne or grass-clover as fertilizer. It is concluded that cutand-carry... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring. |
| Ano: 2013 |
URL: http://orgprints.org/22962/1/2790.pdf |
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| Messmer, Monika; Uehlinger, Noemi; Berner, Alfred; Scholberg, Johannes; Mäder, Paul. |
| Most varieties have been selected under high input conditions, including seed treatment, herbicide applications, as well as optimal levels of fast releasing fertilizers. Under organic farming nutrient release is dependent on the temperature and biological activity of the soil and its interaction with the declining residues from previous crops and applied quantity of farmyard manure. As a consequence it is not always possible to match nutrient release with crop demand over time. This effect is even more severe under conservation tillage. To promote conservation tillage in organic farming, it is necessary to identify cultivars that show high nutrient use efficiency (NUE) under these conditions. While there is substantial evidence that breeding for low N... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil tillage Soil Breeding; Genetics and propagation Root crops. |
| Ano: 2013 |
URL: http://orgprints.org/26561/7/messmer-etal-2013-Eucarpia-Conference-GenotypeXmanagement_interaction_for_NUE_of_maize.pdf |
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