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| Registros recuperados: 71 | |
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| Urbatzka, Peer; Castell, Adelheid. |
| There is little experience in repeated growing of soybeans in a short term crop rotation in Germany. Also, the impact of soils with legume fatigue on soy beans is unknown. To gather information on potential problems with a high share of soybeans in organic cropping system under Bavarian soil and climate conditions, soybeans were grown each three years over three rotations in a long term field experiment on a legume fatigue soil. The yield and the crude protein content were raised or unchanged in the second and third cropping of soybeans. No pests were detected. Hence, a rotation break of two years seem to be in the medium term sufficient and there seem to be no interaction between soilborne diseases for pea and field bean. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds. |
| Ano: 2015 |
URL: http://orgprints.org/26907/1/26907_urbatzka.pdf |
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| Urbatzka, Peer; Cais, Kathrin; Salzeder, Georg. |
| The risk of nitrogen leaching in winter after breaking of grass-clover sward can be reduced by delayed ploughing. The impact of ploughing date (either late autumn or spring) was compared regarding grain yield and baking quality of spring wheat. The field trial was conducted from 2001 to 2003 and from 2006 to 2008 on a trial site with sandy-loamy site conditions nearby Freising, Bavaria. Two varieties of spring wheat were examined. Higher baking quality (protein content, falling number, Zeleny index, wet gluten content, loaf volume) was identified in all years after ploughing in late autumn compared to spring ploughing. On the other hand, grain yield was higher after ploughing in spring in two of the six environments, but in one year the opposite... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil tillage. |
| Ano: 2013 |
URL: http://orgprints.org/21339/1/21339_Urbatzka.pdf |
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| Urbatzka, Peer; Graß, Rüdiger; Haase, Thorsten; Schüler, Christian; Trautz, Dieter; Heß, Jürgen. |
| Winter peas have several agronomic advantages in comparison to spring pea, but the overwintering of winter peas are uncertain under the climatic conditions in Germany. Therefore, the winterhardiness of four genotypes (cvs. Assas, Cheyenne, EFB 33, Württembergische) was examined in two field trials in three growing seasons. In a first trial all peas were grown in pure and mixed stands with rye at the experimental farm of the University of Kassel and at the experimental farm of the University of Applied Sci-ence in Osnabrueck. In a second trial the impact of three sowing dates (mid of Sep-tember, end of September/begin of October and mid of October, respectively) was de-termined at the experimental farm of the University of Kassel only in pure stands. In... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2011 |
URL: http://orgprints.org/17506/3/Urbatzka_17506.pdf |
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| Urbatzka, Peer; Cais, Kathrin; Rehm, Anna; Salzeder, Georg; Schätzl, Robert. |
| The cropping of leguminous cover crops usually leads to higher yields in subsequent cereals. The economic efficiency of leguminous cover crops was calculated in several field trials. Criterion was the yield (with adjusted costs) from the succeeding crops winter triticale and spring oats, respectively, after different leguminous cover crops undersown or as stubble seed in comparison to a control plot without cover crop. Thereby, the costs for seeds and the variable machine costs were taken into account. The highest yield was reached for both types of grain following undersown white clover, the second highest following undersown black medic. In contrast, the yield was lower following red clover and grass-clover undersowings as well as different stubble... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Farm economics. |
| Ano: 2013 |
URL: http://orgprints.org/21329/1/21329_Urbatzka.pdf |
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| Urbatzka, Peer; Graß, Rüdiger; Schüler, Christian; Heß, J.. |
| In organic farming the cultivation of leguminous crops is one of the most important sources of nitrogen (N). However, in the case of winter field peas, the amount of N fixed, N supply to the subsequent crop and N balance there are hardly any published data. Therefore, the pre-crop effect of six genotypes of winter pea (five regular leaf type, one semi-leafless cultivar) and one semi-leafless spring pea cultivar in single and mixed cropping (with rye spring barley respectively) was examined in three suc-cesive growing seasons (2003/04-2005/06). Immediately after harvest, a catch crop was sown and sampled during the first half of October to determine biomass dry matter and N uptake. In single cropping, N uptake by the catch crop was usually significantly... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2007 |
URL: http://orgprints.org/9467/1/9467_Urbatzka_Vortrag.pdf |
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| Jobst, Florian; Demmel, Markus; Urbatzka, Peer. |
| Successful mechanical weed control is a crucial aspect in organic soybean production. Six weed control techniques (spring tine harrow, inter row hoe with duckfoot sweeps, separately used or in combinations, inter row hoe with additional tools: finger weeder, torsion weeder, ridging wings) were evaluated concerning the effects on weed ground cover and on plant losses. Soy bean plant stands have been established in various rows spacing using different types of seeders (12.5 cm with seed drill for harrowing variant and 50 cm with single seed drill for hoeing variants). The field trials were conducted at two sites in three years (2011-2013). The weed ground cover in the harrowing variant was higher than in the hoeing variants in three of five environments. In... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Weed management. |
| Ano: 2015 |
URL: http://orgprints.org/27160/1/27160_jobst.pdf |
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| Registros recuperados: 71 | |
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