A5059300245- Soil Carbon and Nitrogen Dynamics
- Agronomic Practices and Intercropping Systems
- Weed Control and Herbicide Applications
- Plant Water Relations and Carbon Dynamics
- Plant nutrient uptake and metabolism
- Bioenergy crop production and management
- Organic Food and Agriculture
- Soil and Water Nutrient Dynamics
- Climate change impacts on agriculture
- Crop Yield and Soil Fertility
- Agriculture, Land Use, Rural Development
- Water-Energy-Food Nexus Studies
- Scientific Research and Discoveries
- Legume Nitrogen Fixing Symbiosis
- Irrigation Practices and Water Management
- Energy and Environment Impacts
- Soil and Unsaturated Flow
- Global Energy and Sustainability Research
- Community and Sustainable Development
- Anaerobic Digestion and Biogas Production
- Rural development and sustainability
- Rice Cultivation and Yield Improvement
- Plant responses to elevated CO2
- Wheat and Barley Genetics and Pathology
- Environmental Education and Sustainability
Aarhus University
2024
Arizona State University
2022
Iowa State University
2014-2021
Washington State University
2015-2017
Centro Internacional de Mejoramiento de Maíz Y Trigo
2015
Abstract We used the Agricultural Production Systems sIMulator (APSIM) to predict and explain maize soybean yields, phenology, soil water nitrogen (N) dynamics during growing season in Iowa, USA. Historical, current forecasted weather data were drive simulations, which released public four weeks after planting. In this paper, we (1) describe methodology perform forecasts; (2) evaluate model prediction accuracy against collected from 10 locations over years; (3) identify inputs that are key...
Abstract In addition to soil health and conservation benefits, cover crops (CCs) may offer weed control in the midwestern United States, but individual studies report varying effects. We conducted a meta‐analysis of measuring biomass (WBIO) or density (WDEN) paired CC no‐cover treatments corn ( Zea mays L.)–soybean [ Glycine max (L.) Merr] rotations U.S. Midwest. Fifteen provided 123 comparisons WBIO 119 WDEN. Only grass CCs significantly reduced WBIO, while no found evidence management...
Abstract There is a strong link between nitrate (NO 3 -N) leaching from fertilized annual crops and the rate of nitrogen (N) fertilizer input. However, this leaching-fertilizer relationship poorly understood degree to which soil type, weather, cropping system influence it largely unknown. We calibrated Agricultural Production Systems sIMulator process-based model using 56 site-years data sourced eight field studies across six states in U.S. Midwest that monitored NO -N artificial subsurface...
Cool-season cover crops have been shown to reduce soil erosion and nutrient discharge from maize ( Zea mays L.) soybean [ Glycine max (L.) Merr.] production systems. However, their effects on long-term weed dynamics are not well-understood. We utilized five research trials in Iowa quantify germinable seedbank densities compositions after 10+ years of cropping treatments. All consisted zero-tillage maize-soybean rotations managed with without the inclusion a yearly winter rye Secale cereal...
Abstract The increased spring rainfall intensity and amounts observed recently in the US Midwest poses additional risk of nitrate (NO 3 ) leaching from cropland, contamination surface subsurface freshwater bodies. Several individual strategies can reduce NO loading to ecosystems (i.e. optimize N fertilizer applications, planting cover crops, retention active cycling N), but potential for synergistic interactions among management practices has not been fully examined. We applied portfolio...
Weeds present important challenges to both conventional farmers who rely on herbicides and organic cultivation. Data from field experiments indicate that diversifying crop sequences with additional species can improve weed suppression when either or cultivation serve as primary control tactics. Here, we report the results of modeling analyses investigated how cropping system diversification would affect population dynamics giant ragweed (Ambrosia trifida L.), an annual dicotyledonous is...
Genome‐wide association mapping is a powerful tool for dissecting the relationship between phenotypes and genetic variants in diverse populations. With improved cost efficiency of high‐throughput genotyping platforms, desirable method mining populations favorable alleles that hold value crop improvement. Stem rust, caused by fungus Puccinia graminis f. sp. tritici, devastating disease threatens wheat ( Triticum aestivum L.) production worldwide. Here, we explored basis stem rust resistance...
Abstract Addition of an overwintering cereal rye ( Secale cereale L.) cover crop (CC) to midwestern maize Zea mays L.)‐based systems offers several environmental benefits, but the long‐term effects this practice on soil hydrological properties are not well understood. We utilized four (10+ yr) trials (two commercial fields, two research plots) in Iowa that included a replicated winter CC and no‐cover treatment no‐till maize/soybean [ Glycine max (L.) Merr.] systems. took intact 7.62‐cm diam....
Food systems have been framed as a “wicked problem” due to the complex socio-ecological impacts they foster, ranging from contributing nearly quarter of anthropogenic greenhouse gas emissions myriad social (e.g., health, food safety, and security). In European green transition for systems, multiple actors are involved. However, farmers play unique critical role agricultural land managers navigators social, political, environmental factors. Using cover cropping intercropping examples, we...
Increasing soil carbon content via agricultural practices not only enhances the production potential of land, but also counteracts rising atmospheric CO 2 levels. When predicting systems’ effects on carbon, quantifying efflux derived from live roots is particular importance as it a through‐flux and does signify depletion carbon. This field study aimed to measure compare emissions in annual perennial agroecosystems. We used periodic 48‐hour shading over two growing seasons estimate root...
Cover crops and weed suppression in the US Midwest: A meta-analysis modeling study.AbstractIn addition to soil health conservation benefits, cover (CCs) may offer control Midwestern United States (Midwest), but individual studies report varying effects. We conducted a of measuring biomass (WBIO) or density (WDEN) paired CC no-cover treatments corn (Zea mays L.)-soybean (Glycine max (L.) Merr) rotations Midwest. Fifteen provided 123 comparisons WBIO 119 WDEN. Only grass CCs significantly...
Wicked problems are inherent in food–energy–water systems (FEWS) due to the complexity and interconnectedness of these systems, addressing challenges necessitates involvement diverse stakeholders FEWS. However, successful stakeholder engagement requires a strong understanding relationships between specific wicked problem. To better account for relationships, we adapted means, motive, opportunity (MMO) framework develop method analysis that evaluates agency related problem This involves two...