E-Dissertationen: Browsing E-Dissertationen by Author "Amelung, Wulf"
Now showing items 1-20 of 31
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Above- and belowground carbon stocks in semi-arid land-use systems under integrated watershed management in Gergera watershed, Ethiopia
Gessesse, Tigist Araya (2016-12-06)Enhanced carbon stocks help to improve the productivity and resilience of farming systems, especially in smallholder communities relying on subsistent agriculture. This study investigated the total terrestrial stock of ... -
Binding and mobilization of pharmaceuticals in wastewater-irrigated soils and sediments of the Mezquital Valley, Mexico
Carrillo, Manuel (2017-05-16)The irrigation of crop fields with treated or untreated wastewater has been an ancient practice in many cities around the world and is still a common practice nowadays. In doing so, wastewater is disposed and at the same ... -
Conservation tillage in Kenya: the biophysical processes affecting its effectiveness
Maguta, Job Kihara (2009-07-14)Appropriate soil management is important for improved ecosystem functioning and high crop production. This study investigates how different tillage [reduced tillage (RT) and conventional tillage (CT)], crop residue (plus ... -
Digital soil mapping using survey data and soil organic carbon dynamics in semi-arid Burkina Faso
Hounkpatin, Kpadé Ozias Laurentin (2018-04-27)With computer-assisted geostatistics and data mining methods, digital soil mapping (DSM) offers new possibilities for providing soil spatial information for data scarce areas such as West Africa. Such information could ... -
Ecological sanitation via thermophilic co-composting of humanure and biochar as an approach to climate-smart agriculture
Castro Herrera, Daniela (2022-06-01)Lack of basic sanitation and appropriate waste management, limited access to mineral and organic fertilizers, and land degradation are major public health and food security challenges, particularly in developing regions ... -
The effect of deep tillage and incorporated organic material on development of different cereal crops
Jakobs, Inga (2019-11-26)Climate change is the most challenging factor for modern agriculture. The risk of heatwaves combined with heavy precipitation events and steady rainfall absence determines agriculture in many regions of the world. One of ... -
Entwicklung, Optimierung, Validierung und Automatisierung eines Immunoassays zur sensitiven Detektion des endokrinen Disruptors 17β-Östradiol im Wasserkreislauf
Hintemann, Therese (2007)Über kommunale Abwässer und die Ausbringung tierischer Düngemittel (z.B. Gülle und Mist) kann das natürliche Sexualhormon 17β-Östradiol (E2) in den Wasserkreislauf gelangen und stellt dort auf Grund seiner hohen endokrinen ... -
Experiments and numerical studies on transport of sulfadiazine in soil columns
Unold, Myriam (2010-12-01)Veterinary antibiotics like sulfadiazine (SDZ) are used in large amounts worldwide. Excreted as parent compounds or in the form of metabolites they reach agricultural soils mainly via spreading of manure or sewage sludge ... -
Exploring the potential of multipurpose tree species for revegetating abandoned cropping sites in the lower Amu Darya Basin
Schachtsiek, Tilman (2015-03-04)The land degradation due to soil salinization that results from elevated groundwater table (GWT) is common in intensively irrigated and poorly drained cropping areas in the lower Amu Darya Basin. Given the decreasing ... -
Fate of veterinary pharmaceuticals in soil: An experimental and numerical study on the mobility, sorption and transformation of sulfadiazine
Wehrhan, Anne (2006)Among other sulfonamides sulfadiazine (SDZ) is a widely used antimicrobial substance in intensive livestock production to prevent and treat diseases. Up to 40 % of the administered sulfonamides are eliminated as microbial ... -
Homorhize und allorhize Wurzelsysteme: Vorfruchtwirkungen mehrjähriger Futterpflanzen auf die Ertragsbildung von Kulturpflanzen
Küpper, Paul Martin (2019-12-11)Seit dem Jahr 2007 wird ein mehrfaktorieller Feldversuch zu Früchtefolgen mit Feldfutterpflanzen auf dem Campus Klein-Altendorf nahe Bonn durchgeführt. Das Futter wird nicht geworben, sondern verbleibt nach Mulchschnitten ... -
Improving nitrogen retention in soils treated with Pig and cattle slurry through the use of organic soil amendments
Cao, Xinyue (2023-06-21)Animal slurry has recently experienced a renaissance as organic nitrogen (N) fertilizer because, on the one hand, sustainable organic farming is receiving growing attention in order to protect the environment and, on the ... -
Iron isotope fractionation in arable soil and graminaceous crops
Xing, Ying (2020-11-24)Soils contain large quantities of Fe, however, the Fe-solubility is very low. Plants have developed two efficient strategies to secure Fe uptake from soil under Fe-deficient conditions: (i) the sequential acidification-r ... -
Nutrient elements in micro- to nanosized fractions: occurrence, transport, and plant uptake in agroecosystems
Jia, Yunsheng (2023-04-04)As phosphorus (P) is a non-substitutable nutrient for all organisms and thus pivotal in supporting crop productivity, limited and unevenly distributed phosphate rocks drive research concerns on substituted P fertilizers ... -
Partitioning Water Vapor Fluxes by the Use of Their Water Stable Isotopologues: From the Lab to the Field
Quade, Maria Elisabeth (2019-09-04)Water stable isotopes are powerful tracers for partitioning of the terrestrial ecosystem water vapor fluxes into process-based components, i.e. evapotranspiration (ET) into soil evaporation (E) and plant ... -
Phosphorus forms in fertilized arable soil profiles and related 33P uptake
Koch, Maximilian (2019-09-13)Arable soils usually store several thousand kg phosphorus (P) per ha, thus far exceeding the recommended P fertilizer dose to sustain crop yields. However, the soil profile is frequently not considered in fertilizer ... -
Potential of conservation agriculture for irrigated cotton and winter wheat production in Khorezm, Aral Sea Basin
Tursunov, Mehriddin (2009-02-06)Intensive tillage of soils leads to their slow but steady degradation. Therefore, scientists and farmers have been turning their attention to a more sustainable development in agriculture based on reduced tillage. Zero and ... -
Räumliche Variabilität von Bodeneigenschaften mit Relevanz für das Verhalten von Herbiziden: ein Optimierungsansatz für den Präzisionspflanzenschutz
Mertens, Franz Michael (2008)Ziel dieser im Rahmen des DFG-Graduiertenkollegs 722 „Präzisionspflanzenschutz“ angefertigten Arbeit war es, die teilflächenspezifische Anwendung von Herbiziden durch die Einbindung von Bodeninformationen zu optimieren. ... -
Reactions between nitrite and soil organic matter and their role in nitrogen trace gas emissions and nitrogen retention in soil
Wei, Jing (2018-01-22)As a key intermediate of both nitrification and denitrification, nitrite (NO2-) is highly chemically reactive to soil organic matter (SOM), and it was proved previously that considerable amounts of ... -
Real-time quantification of oxygen isotope exchange between carbon dioxide and leaf/soil water in terrestrial ecosystems with laser-based spectroscopy
Gangi, Laura (2015-08-26)The oxygen isotope ratio of atmospheric carbon dioxide (δ18O-CO2) can be used to partition the gross fluxes of CO2 in terrestrial ecosystems, such as soil respiration and plant assimilation, ...