Search Results - "Wiedner, Katja"

Chemical evaluation of chars produced by thermochemical conversion (gasification, pyrolysis and hydrothermal carbonization) of agro-industrial biomass on a commercial scale by Wiedner, Katja, Rumpel, Cornelia, Steiner, Christoph, Pozzi, Alessandro, Maas, Robert, Glaser, Bruno

“…Technologies for agro-industrial feedstock utilization such as pyrolysis, gasification and hydrothermal carbonization at industrial scale develop rapidly. The…”
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Deciphering timing and rates of Central German Chernozem/Phaeozem formation through high resolution single-grain luminescence dating by von Suchodoletz, Hans, van Meer, Mike, Kühn, Peter, Wiedner, Katja, Schunke, Torsten, Reimann, Tony

“…Chernozems/Phaeozems are important agricultural resources and have been intensively used for millennia. However, their origin and age are still controversial…”
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Stability of Woodchips Biochar and Impact on Soil Carbon Stocks: Results from a Two-Year Field Experiment by Irene Criscuoli, Maurizio Ventura, Katja Wiedner, Bruno Glaser, Pietro Panzacchi, Christian Ceccon, Maximilian Loesch, Barbara Raifer, Giustino Tonon

“…Biochar has been shown to improve soil quality and crop yields. Furthermore, thanks to its high carbon content (C) and stable chemical structure, biochar can…”
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Biochar organic fertilizers from natural resources as substitute for mineral fertilizers by Glaser, Bruno, Wiedner, Katja, Seelig, Sebastian, Schmidt, Hans-Peter, Gerber, Helmut

“…Biochars are new, carbon-rich materials that could sequester carbon in soils improve soil properties and agronomic performance, inspired by investigations of…”
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Pedological properties related to formation and functions of ancient ridge and furrow cultivation in Central and Northern Germany by Langewitz, Theresa, Wiedner, Katja, Polifka, Steven, Eckmeier, Eileen

“…•Ridge and furrows were studied by morphological and physicochemical analyses.•Study sites revealed a diversity in morphology, environmental setting and…”
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Chemical modification of biomass residues during hydrothermal carbonization – What makes the difference, temperature or feedstock? by Wiedner, Katja, Naisse, Christophé, Rumpel, Cornelia, Pozzi, Alessandro, Wieczorek, Peter, Glaser, Bruno

“…► Hydrothermal carbonization temperature is the main control of hydrochar chemistry. ► Feedstock did not influence hydrochar composition except for N content…”
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Acceleration of Biochar Surface Oxidation during Composting? by Wiedner, Katja, Fischer, Daniel, Walther, Sabine, Criscuoli, Irene, Favilli, Filippo, Nelle, Oliver, Glaser, Bruno

“…Biochar composting experiments were performed to determine whether composting is a suitable method to accelerate biochar surface oxidation for increasing its…”
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Chernozem relics in the Hellweg Loess Belt (Westphalia, NW Germany) – Natural or man-made? by Kasielke, Till, Poch, Rosa M., Wiedner, Katja

“…Chernozems and Chernozem-like soils are widespread e.g. in Central Germany but its formation is still controversially discussed. Clustered findings of Luvic…”
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Increased CO2 fluxes from a sandy Cambisol under agricultural use in the Wendland region, Northern Germany, three years after biochar substrates application by Polifka, Steven, Wiedner, Katja, Glaser, Bruno

“…In recent years, biochar has been discussed as an opportunity for carbon sequestration in arable soils. Field experiments under realistic conditions…”
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Substitution of mineral fertilizers with biogas digestate plus biochar increases physically stabilized soil carbon but not crop biomass in a field trial by Greenberg, Isabel, Kaiser, Michael, Gunina, Anna, Ledesma, Philipp, Polifka, Steven, Wiedner, Katja, Mueller, Carsten W, Glaser, Bruno, Ludwig, Bernard

“…Various organic amendments are scrutinized as potential agricultural management strategies to ensure soil productivity while mitigating climate change due to…”
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Effects of microplastic and microglass particles on soil microbial community structure in an arable soil (Chernozem) by Wiedner, Katja, Polifka, Steven

“…Microplastic and microglass particles from different sources enter aquatic and terrestrial environments. The complexity of their environmental impact is…”
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Improvement of soil fertility in historical ridge and furrow cultivation by Langewitz, Theresa, Wiedner, Katja, Fritzsch, Dagmar, Eckmeier, Eileen

“…Ridge and furrow cultivation is the most widely used agricultural technique in medieval and postmedieval Europe, but the fertilization of soils during their…”
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The effect of biochar with biogas digestate or mineral fertilizer on fertility, aggregation and organic carbon content of a sandy soil: Results of a temperate field experiment by Greenberg, Isabel, Kaiser, Michael, Polifka, Steven, Wiedner, Katja, Glaser, Bruno, Ludwig, Bernard

“…Substitution of mineral fertilizers with organic soil amendments is postulated to improve productivity‐relevant soil properties such as aggregation and organic…”
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Charcoal and biological activity in formiguer soils of Catalonia (Spain): Application of a micromorphological approach by Alvarez, María Fernanda, Poch, Rosa Maria, Olarieta, José Ramón, Wiedner, Katja

“…The "formiguers" (earth mounds to burn woody plant residues) constituted a common practice of fertilization of soils in many regions of Spain in the past. The…”
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Anthropogenic Dark Earth in Northern Germany — The Nordic Analogue to terra preta de Índio in Amazonia by Wiedner, Katja, Schneeweiß, Jens, Dippold, Michaela A., Glaser, Bruno

“…During an archaeological excavation of a Slavic settlement (10th/11th C. A.D.) in Brünkendorf (Wendland region in Northern Germany), a thick black soil (Nordic…”
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Comparison of different methods for determining lignin concentration and quality in herbaceous and woody plant residues by Faust, Sibylle, Kaiser, Klaus, Wiedner, Katja, Glaser, Bruno, Joergensen, Rainer Georg

“…Aims Acid detergent lignin (ADL), acetyl bromide (AcBr), and cupric oxide oxidation (CuO) were compared as methods for determining lignin concentration and…”
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Increased CO 2 fluxes from a sandy Cambisol under agricultural use in the Wendland region, Northern Germany, three years after biochar substrates application by Polifka, Steven, Wiedner, Katja, Glaser, Bruno

“…In recent years, biochar has been discussed as an opportunity for carbon sequestration in arable soils. Field experiments under realistic conditions…”
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Changes in the molecular composition of organic matter leached from an agricultural topsoil following addition of biomass-derived black carbon (biochar) by Riedel, Thomas, Iden, Sascha, Geilich, Jennifer, Wiedner, Katja, Durner, Wolfgang, Biester, Harald

“…•Biochar amendments directly affected the soil carbon cycle.•Biochar reduced organic matter (OM) mobilization from a soil.•Carbon oxidation state of OM…”
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Can biochar and hydrochar stability be assessed with chemical methods? by Naisse, Christophe, Alexis, Marie, Plante, Alain, Wiedner, Katja, Glaser, Bruno, Pozzi, Alessandro, Carcaillet, Christopher, Criscuoli, Irene, Rumpel, Cornélia

“…•Acid dichromate oxidation distinguishes reactivity of biochars and hydrochars .•Feedstocks may significantly influence biochar reactivity.•Holocene charcoal…”
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Effect of biochar fertilizers on amino acid variability of Secale cereale and Lupinus angustifolius by Wiedner, Katja, Schimpf, Corinna, Polifka, Steven, Glaser, Bruno

“…Little is known on the effects of biochar on N uptake and amino acid variability in crops such as winter rye and narrow-leafed lupine despite the fact that…”
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