Organic Fertilization in Maize Cropping Systems: Measures to Reduce N Losses by Hans-Werner Olfs

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Evaluation of the Dynamic Tube Method for Measuring Ammonia Emissions after Liquid Manure Application by Martin ten Huf, Hans-Werner Olfs

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Development of a Physicochemical Test Kit for On-Farm Measurement of Nutrients in Liquid Organic Manures by Max-Frederik Piepel, Hans-Werner Olfs

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Lessons learnt from the use of passive samplers to measure ammonia emissions in multi-plot experiments by Nils Carsten Thomas Ellersiek, Hans-Werner Olfs

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An Incubation System for the Simulation of Ammonia Emissions from Soil Surface-Applied Slurry: Effect of pH and Acid Type by Nils Carsten Thomas Ellersiek, Hans-Werner Olfs

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On-Farm Application of Near-Infrared Spectroscopy for the Determination of Nutrients in Liquid Organic Manures: Challenges and Opportunities by Charlotte Höpker, Klaus Dittert, Hans-Werner Olfs

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Evaluation of Physicochemical On-Farm Quick Tests for Estimating Nutrient Concentrations in Pig Slurry and Development of an Application for Mobile Devices by Max-Frederik Piepel, Klaus Dittert, Hans-Werner Olfs

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Effects of sample pre-treatments on the analysis of liquid organic manures by visible and near-infrared spectrometry by Michael Horf, Robin Gebbers, Hans-Werner Olfs, Sebastian Vogel

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Optical Spectrometry to Determine Nutrient Concentrations and other Physicochemical Parameters in Liquid Organic Manures: A Review by Michael Horf, Sebastian Vogel, Harm Drücker, Robin Gebbers, Hans-Werner Olfs

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Eco-innovations in the German fertilizer supply chain: Impact on the carbon footprint of fertilizers by Kathrin HASLER, Stefanie BRÖRING, Onno S.W.F. OMTA, Hans-Werner OLFS

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Determination of Nutrients in Liquid Manures and Biogas Digestates by Portable Energy-Dispersive X-ray Fluorescence Spectrometry by Michael Horf, Robin Gebbers, Sebastian Vogel, Markus Ostermann, Max-Frederik Piepel, Hans-Werner Olfs

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Influence of Light Intensity and Spectrum on Duckweed Growth and Proteins in a Small-Scale, Re-Circulating Indoor Vertical Farm by Finn Petersen, Johannes Demann, Dina Restemeyer, Hans-Werner Olfs, Heiner Westendarp, Klaus-Juergen Appenroth, Andreas Ulbrich

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Influence of the Nitrate-N to Ammonium-N Ratio on Relative Growth Rate and Crude Protein Content in the Duckweeds <i>Lemna minor</i> and <i>Wolffiella hyalina</i> by Finn Petersen, Johannes Demann, Dina Restemeyer, Andreas Ulbrich, Hans-Werner Olfs, Heiner Westendarp, Klaus-Jürgen Appenroth

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Nutritional Value of Duckweed as Protein Feed for Broiler Chickens—Digestibility of Crude Protein, Amino Acids and Phosphorus by Johannes Demann, Finn Petersen, Georg Dusel, Manuela Bog, Reindert Devlamynck, Andreas Ulbrich, Hans-Werner Olfs, Heiner Westendarp

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Effects of Liquid Manure Application Techniques on Ammonia Emission and Winter Wheat Yield by Martin ten Huf, Thorsten Reinsch, Mareike Zutz, Christoph Essich, Reiner Ruser, Caroline Buchen-Tschiskale, Heinz Flessa, Hans-Werner Olfs

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