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| Wyngaard, Nicolas; Cabrera, Miguel Lorenzo; Jarosch, Klaus A.; Bünemann, Else Katrin. |
| A sound prediction of soil organic phosphorus (Po) mineralization would be helpful to improve fertilizer recommendations. However, in most mineral soils expensive and time consuming isotopic dilution experiments are required to assess Po mineralization. A proposed method to estimate Po mineralization is the quantification of P in the coarse fraction (CF, >53 μm) of the soil. The aim of this study was to evaluate if P in the CF can effectively predict Po mineralization. Soil samples from three North American long-term arable field experiments (>10 years) with different textures (sand content 15–82%) and different fertilization treatments (non-P-fertilized, mineral P fertilizer, poultry litter) were analyzed. Soil samples were physically fractioned... |
| Tipo: Journal paper |
Palavras-chave: Soil quality. |
| Ano: 2016 |
URL: http://orgprints.org/32310/1/wyngaard-etal2016-SoilBiolBiochem-Vol96-p107-118.pdf |
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| Oberson, Astrid; Jarosch, Klaus A.; Bosshard, Christine; Dubois, David; Frossard, Emmanuel; Hammelehle, Andreas; Mäder, Paul; Mayer, Jochen. |
| Organic and conventional cropping systems differ in the nature and amounts of nitrogen (N) inputs, which may affect efficiency and sustainability of N use. In the DOK (bio-Dynamic, bio-Organic, Konventionell) field experiment, organic and conventional cropping systems have been compared since 1978 at two fertilization levels. Nitrogen inputs via manure and/or mineral fertilizers, and N exports from plots with harvested products have throughout been recorded. For all treatments, N outputs with harvests have exceeded the inputs with fertilizers. Over the past years, symbiotic N2 fixation by soybean and clover grown in the trial has additionally been assessed, indicating average annual inputs of about 100 kg ha-1 yr-1 of N fixed from the atmosphere. Soil... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general; Soil quality; Soil tillage. |
| Ano: 2018 |
URL: http://orgprints.org/34559/1/oberson-etal-2018ESA2018_FinalAbstractBook_p44.pdf |
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