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Does organic agriculture reduce soil erodibility? The results of a long-term field study on loess in Switzerland Organic Eprints
Siegrist, S.; Schaub, D.; Pfiffner, L.; Mäder, P..
In a long-term field trial in northwestern Switzerland, the effects of organic and conventional land-use management on earthworm populations and on soil erodibility were investigated. A silt loam soil which had developed in deep deposits of alluvial loess characterised the study site. Three methods were applied to analyse soil erodibility, at three different periods between autumn 1992 and 1993: aggregate stability (measured in the laboratory by a high energy rainfall simulation and by percolation) and soil particle detachment (measured in the field by splash erosion). Earthworm biomass and density, as well as the population diversity, were significantly greater on the organic plots than on the conventional plots. Likewise, the aggregate stability of the...
Tipo: Journal paper Palavras-chave: Soil biology.
Ano: 1998 URL: http://orgprints.org/26776/1/Siegrist_et_al_1998_AEE.pdf
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A Comparison of Plant and Animal Based Fertiliser for the Production of Organic Vegetable Transplants Organic Eprints
Koller, Martin; Alföldi, Thomas; Siegrist, S.; Weibel, Franco.
In Switzerland, transplants for organic vegetable growing have been fertilised traditionally with slaughterhouse by-products. In autumn 2000, the Swiss government restricted the use of such products because of the BSE crisis. To maintain the production of organic transplants, alternative fertilisers needed to be tested. Eleven alternatives to horn powder (standard fertiliser) were selected based on the organic standards of the European Union, including feather powder (as an animal based product without BSE risk). The products were mixed with a standard growing media for organic transplants in a concentration of 300 mg nitrogen L-1 growing media. Different experiments where set up with head lettuce (Lactuca sativa), Chinese cabbage (Brassica rapa var....
Tipo: Book chapter Palavras-chave: Nutrient turnover Soil quality Vegetables Crop health; Quality; Protection Soil biology.
Ano: 2004 URL: http://orgprints.org/2743/1/koller%2Det%2Dal%2D2003%2Dacta%2Dhort.pdf
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